MTD Central Distributors Map, Addresses, and Phone Numbers are on the CD-ROM CPD
Brand News MTD makes some private branded equipment. We always have. MTD makes some products under the Brand: Sold at various retailers. Craftsman warranty will be handled though Sears. Outside of warranty, MTD dealers are free to work on the Craftsman branded equipment on a customer–pay basis.
Brand News MTD does make some LX lawn tractors and GT garden tractors sold under the TORO brand. Dealers are likely to recognize the basic tractor designs when they are brought in for service. For warranty purposes, they are to be treated as TORO products. MTD is not involved.
Brand News MURRAY is a different situation. Murray branded equipment made by MTD will be treated just like YardMan, YardMachine, TroyBilt, or Bolens. Look for the MTD model and serial number tag.
Brand News There is very little that is serviceable on Remington Electric Chainsaws.
Brand News Unusual Remington Service features: • Saw Chain has unusual link counts • Do not use bar and chain lube - fill the chain lube tank with motor oil Warranty: There is very little to be done under warranty, but equipment that fails within the warranty period does need to be inspected. This is good for ½ hour diagnosis on the warranty claim.
Legal Disclaimer On December 29, 2008, DHP Holdings II Corporation and its affiliates, including DESA Specialty LLC and DESA, LLC (“DESA”), filed a bankruptcy petition with the U.S. Bankruptcy Court for the District of Delaware, Case No. 08-13422 (MFW) (Jointly Administered). Effective as of May 15, 2009, MTD Southwest Inc (“MTD”) purchased certain assets of DESA, including “Remington” trademarks for certain outdoor lawn and garden power equipment.
2005 Model Numbering System 13AD789G790 Customer Number:063 Lowes Troy-bilt, 401 Yardman, 790 White,etc Deck Deck Size Size (( F=38 F=38 G=42 G=42 H=46 H=46 P=50 P=50 K=54 K=54 Style Style (Hood (Hood // Grill) Grill) Transmission Transmission Frame Frame Size Size Engine Engine Number Number // Letter Letter Sales Sales Indicator Indicator Product type: 11=push mowers 12=self propelled mowers 13=lawn tractor 14=garden tractor 21=tillers 24=chipper shedders / vacs 31=snow throwers 41=hand held products
2005 Walk Behinds 12A–979L401 Customer Number Engine Number / Letter Two Digit Deck Number Sales Indicator Model Type: 11=Push, 12=Self Propelled
2005 Tillers / Chore Performers Example: Troy-Bilt 21 A – 6 8 2 J 7 6 6 Customer Number Engine Number / Letter Platform: 8=Horse, 3=Tuffy, 6=Pony 6 = Gear Drive Rear Tine Tillers Sales Indicator Model Type: 21=Tiller, 24=Chore Performer
Current Serial Numbers 2L213C20001 Sequence unit was manufactured Assembly line which manufactured unit Plant where unit was manufactured Year unit was manufactured 3 = 2003 Day of the month unit was manufactured Month of the year unit was manufactured Lot / engineering level.
Hand-Held Warranty Exchange Policy Under MTD’s handheld warranty, all customers are to obtain inspection and service from authorized servicing center. If a dealer determines that any of the following conditions exceed 75% of the purchase price, then replacement of the product is necessary.
Hand-Held Warranty Exchange Policy To save time and cost, the preferred method of exchange is to refer the customer to the retailer as follows: 1. The authorized dealer should write the customer an invoice stating the situation 2. The customer should visit the retail store, from which the original product purchase occurred 3. The retailer will exchange the hand held product 4. The retailer will then contact MTD’s Single Point of Contact (SPOC) team for credit 5.
Hand-Held Warranty Exchange Policy If this is not possible (i.e. the retailer has gone out of business or no longer carries the product line) MTD’s customer service group may handle the situation as follows: 1. MTD will obtain the customer's information, such as name address & phone number 2. MTD will obtain product information, such as model and serial numbers 3. MTD will obtain dealer information, such as dealer name, address, phone, and verify failure 4. MTD manager will approve the exchange 5.
Hand-Held Warranty Exchange Policy Service Dealer should submit claim for .50 (30 Min.
Hand -Held Repair Guidelines Hand-Held We have included a document that will help you determine whether you should take the time to repair a hand-held product It covers such topics as: EVALUATION CHECKING FUEL FLOODING IGNITION COMPRESSION HEAT RELATED ISSUES
Hand Held Products String Trimmer – Chain Saws Vacs/Blowers Edgers- Hedge Trimmers The “Repair Time Allowed” for profitability, Of almost any “Hand Held Chore Performer product must be based on: “What is the retail value?” With this concern, several items and thoughts must be kept in mind
Start With a Systematic Repair Procedure Observation • Condition of unit, does it show reasonable care? • Is tampering and damage obvious? • Proper trimmer line or spool? • Recoil rope or spring problems? • Engine related problems?
Start With a Systematic Repair Procedure Cont. Evaluation • What was the retail value when new? Were there add on accessories that will place the unit in a higher pricing evaluation? • Is it within the warranty periods? • How old is it? Age, must be considered, the possibility of engine fatigue, excessive usage, (commercial use), causing wear and heat conditions • Items not considered a manufacturing defect, etc.
Engine Issues Fuel: • Smell test. Old fuel smells like shellac • Has the chore performer been sitting for a season or longer with fuel in the gas tank? Drain tank and replace with fresh fuel • Save a sample of the old fuel and compare with the recommended fuel • Save in a see-through container to show the customer.
Engine Issues Cont. Fuel/Oil Mix • For 2-cycle units, a proper fuel/oil mix is necessary.
Failure to Start Check spools for the proper gauge of trimmer line • Is the line properly wrapped on the spool? The wrong wrap and line diameter can cause hard starting conditions • Check air filters and gas tank filters (clean / replace) • Check gas lines for hardening, broken / cracked, loosely connected, or for wear holes, causing the line to take in excessive amounts of air
Failure to Start Cont. Listen: • When pulling the recoil rope to start, the engine will attempt to start, when this occurs, immediately, remove from the choke position and pull again.
Heat Cont. The cause is usually obvious, for all products. On chain saws, saw dust can be jammed packed around the cooling fins, causing blocked air flow passages inside the housing Chain saw overheating can be due to forcing the engine to run without proper chain lubrication and trying to cut with a dull chain Air-cooled engines must be kept as clean as possible. Saw chains must be kept sharpened Time to call a “Halt” or “Next” and “Move on.” Communicate the repair/replace options with the customer.
Further Failure to Start: Cont. Ignition: • Replace the Spark Plug and/or check for spark with a tester away from the spark plug hole to prevent a possible flair-up fire • Depending on condition and age, changing the spark plug would be the next thing to do after you have performed a fuel test Still will not start: • Check the Air Gap between the flywheel and the coil and adjust, (generally in the range of .008 to .
Observe: Visually check the wiring and check the wire path for the possibility of a pinched or shorted / broken wire If the coil shows a resistance reading of around 90 to 160 Ohms, at approximately 70 degrees Fahrenheit, the coil windings are good Still will not start: Move on If you have ignition and it still appears to be a fuel issue, consider rebuilding the carburetor.
Compression Test Prior to rebuilding, check the compression. If compression is within specs, consider rebuilding the carburetor When checking for compression: • If the unit has a compression release button, be sure to close when checking • If compression is below 60 PSI.
Heat Issues The remaining factor to be considered: • You could now encounter a major repair and the need for a short block • Compare the cost of repair versus cost of replacement • Remove the spark plug, pull the starter rope slowly and look for evidence of excessive heat, and scoring on the sides of the cylinder, caused by heat or dirt ingestion • On a two cycle unit, remove the muffler and, using a light, look into the exhaust port and observe the condition of the piston and rings
Conclusion There are many extensive troubleshooting guides available to increase knowledge with pictured analysis for reference With the in-depth knowledge and experience gained each time you work on a hand-held engine, you will gain evaluation speed.
Mini 4cycle Engine Spark Plug: • Champion RDZ19H, gasket seat plug • Torque the spark plug to 100-110 in. lbs.(11.3-12.4 Nm) • The spark plug gap is .025”(.
Mini 4cycle Engine • To adjust the valves remove the valve cover with a T-25 driver
Mini 4cycle Engine • Use the starter rope to turn the crank shaft to bring the piston to top dead center of the compression stroke (valves closed) • The valve clearance for this engine is .003”-.006”(.08-.
Mini 4cycle Engine • If the engine has less than 90 psi (6.2 bar) compression, the carburetor will not have enough vacuum to draw fuel into the engine • The engine will have to be torn down to determine the cause of the low compression • If the engine has more than 125 psi (8.
Handheld Electric Starter Press2Start™ Electric Starter 625-04120 • 110V electric starter • Non-serviceable • 2 year warranty • For warranty, replace the whole starter
Bit Adaptor for Drill Power-Start 49MESCBP953
Troy-Bilt Horse Oil capacity of the power unit case is 60 ounces. The tine drive case capacity is 12 ½ ounces To check for proper oil level in the tine drive case, place 3 stacked 2X4’s under the depth stake.
MTD Tiller – Model 410/430 Reports from the field indicate that some of these tillers are hard to push in neutral The following test must be performed before condemning any tiller gear case 1. Start the engine and engage the tiller gear case, forward and reverse making certain the tiller tines do not hit the ground 2. Continue this for approximately two minutes making certain the lubrication inside the gear case has a chance to lubricate all rotating gears and shafts 3.
MTD Tiller – Model 410/430 TEST CONTINUED 4. With the tiller on a smooth hard surface, and the tiller gear case in neutral, attempt to move the tiller forward while pulling on the fish scale NOTE: Have a helper lift the tiller tines off the ground using the tiller handles. It should take no more then 20 to 25 pounds pull to move the tiller 5.
Testing the Hydraulics Before testing the hydraulics: • Make sure reservoir is full with the proper fluid • The beam is oiled • Check the air filter and oil of the engine • Using a tach, set the engine to 3500 rpm • Check the belt condition and tension
Equipment Needed Flow gauge Extra length of hose Various adapters
Install the Flow Gauge at the Pump Install the flow gauge between the pump and the inlet port of the control valve
Walk Behind Snow Throwers Walk behind snow throwers with electric discharge chute control may be changed to manual operation using Kit # 753-04027 For 2004 the hex shaft used in previous production 717-1444, is being replaced by a new hex shaft 717-0494.
2007 People in short pants Snow just got scared… and ran
300 Series Compact New reversible low-wear polycarbonate slide shoes used on some models. This part will fit all 300 thru 700 series snowthrowers. number is 73106439.
Sealed Transmission Replacement Only
500-600 Series 2nd Generation Small Frame 22” Thru 30” Models
500 -600 Series Changes • Over 90 percent is new for 05 • All units come fully assembled • New Polypropylene Chute adapter • New Extreme augers • New belt cover to help belt trap out • 22 – 28” units have 2 augers per side • No more PTO (Camshaft Drive) • 30” units have 3 augers per side • All new handle panel designs • New transmission components • Needle bearings used on drive shafts • New second stage fan with Double D drive system • New friction wheel drive • Single 1/2” cog-style auger belt
Auger Gear Box Changes New thicker collar used instead of 4 thrust washers Single thrust washer replaces 3 shim washers Slip fit dowel design replaces pressed in roll pin
New Extreme Augers 22-28” use 2 augers per side 30” use 3 augers per side
Drive System Changes Camshaft drive has been removed. Wheels are now driven direct off the engine crankshaft.
Transmission Changes Belt keeper added to assist in trapping auger belt New gear reduction needed due to direct drive off the crankshaft
Transmission Changes Cont.
Transmission Changes Cont. Friction wheel assembly now uses 4 self tapping fasteners instead of 6. Travel of rubber disc is now stopped using snap ring instead of roll pin. Note: The friction wheel rubber disc material has not changed.
Double D Fan Shaft & Fan replaces splined fan and shaft
New ½” Single Auger Drive Belt
New Belt Cover Internal mould has changed to assist trap out of the auger drive belt when clutch lever is released
New Design Lower Chute Snap on chute keepers on all models
New ‘Ultra High Molecular Weight’ reversible skid shoes on select models only 731-05984
New Universal Fit Slide Shoes Part number OEM-731-05984 Fits Toro, Sears, Murray, Husqvarna and many others.
Important Special Note Models not equipped with a 120v or 220v starter DO NOT have a ring gear installed. In order to install a starter, a ring gear must be purchased if the customer wants to add a starter.
P90 Engines 26 C.I.D.
MTD Vertical Engine Model Designators Starter/Alternators 1=Recoil start 4 P 90 M 0 A 2=Electric start (12V) Major Revision 3=E. start/alt. 18W Change 4=E. start/alt. 3A/5A 5= AutoChoke/ Recoil 6= AutoChoke/Electric Start Compliance 7= AutoChoke/Electric Start/ U H C 0 (Zero) G W Alt P= Vertical (1 cyl.) Q= Vertical (2 cyl.) United States (50 State) Europe California 49 State U.S.(49) and Europe U.S.(50) and Europe Bore Dia.
Engine Specifications Displacement 420 cc (25.6 cubic inches) Bore 90 mm (3.54”) Compression ratio 8.5:1 Cranking pressure 55 – 80 psi Charging system 3.75A DC/5A AC Oil capacity 1.7L (57.
Maintenance Intervals Maintenance items Interval Oil Change* 50 hrs Oil filter 200 hours Oil pre-screen Annually Clean the air filter 100 hrs Replace the air filter 200 hrs Spark plugs 100 hrs Fuel filter 100 hrs Clean the engine 100 hours * First oil change at 5 hours
P90 Engines Maintenance Critical seal The pleated paper air filter pushes over the neck of the air intake elbow. A foam prefilter wraps around the paper filter.
P90 Engines Maintenance The P90 also has a spin-on oil filter
Charging System The charging system consists of a dual output alternator and a rectifier/regulator Regulator/ Rectifier Stator, under flywheel Rotor = magnets on the inside of the flywheel
Charging System A look closer at the Stator: Red wires = A.C. output to Regulator/rectifier. Orange wire = 5amp A.C.
Charging System At the Regulator/Rectifier: Regulator / Rectifier Stator 1. The paired red wires feed A.C. through. 2. The white wire provides a ground for the system. Main harness plug 3. The violet wire carries 12 volt D.C. to the main harness. Fuel solenoid plug Mag.
Charging System Testing the net-end result: 1. At the harness plug, we should see 11-20 V.A.C. from the orange wire to ground 2. At the harness plug, we should see 13.75-15.5 V.D.C. from the violet wire to ground Regulator / Rectifier Main harness plug 3. What if the violet wire does not provide the specified D.C.? 4. What if the orange wire does not provide the specified A.C.? Stator Fuel solenoid plug Mag.
Charging System To identify the source of a D.C. voltage output problem: The Regulator/Rectifier must be isolated from the stator output. Unplug the connector and check A.C. voltage on the two red wires. Each of the two red wires should show 8.5-10 Volts A.C. to ground. Ground Volts A.C. Regulator / Rectifier 13.75-15.5 Volts D.C.
Electric Starter The starter motor used on the 4P90 engine is a permanent magnet DC motor: The brushes and brush holder are mounted to the end cap and the rotor will ride on top of them.
Rebuilding the Starter Match-mark the end cap and the gearreduction drive to the magnet housing before disassembling the starter.
P90 Engines 26 C.I.D. (420cc) Displacement Pressurized lube to the crankshaft Balance shaft Power output: more than sufficient.
MTD Engine Updates
MTD Vertical Engine Model Designators Starter/Alternators 1=Recoil start 2=Electric start (12V) 3=E. start/alt. 18W 4=E. start/alt. 3A/5A 5= AutoChoke/ Recoil 6= AutoChoke/Electric Start 1P61MUA Major Revision Change Compliance U H C 0 (Zero) G W P= Vertical (1 cyl.) Q= Vertical (2 cyl.) Bore Dia. (mm) United States (50 State) Europe California 49 State U.S.(49) and Europe U.S.
MTD Horizontal Engine Model Designators Starter/Alternators 161- SHA 1=Recoil start 2=Electric start 3=E. start/alt. 20W/20W 4=E. start/alt. 3A DC/5A Bore Dia. (mm) Major Revision Change Compliance U H C 0 (Zero) G W United States (50 State) Europe California 49 State U.S.(49) and Europe U.S.
MTD Engine Serial Numbers 1P65FH/0510271A0023 Year Month Date Model number Producing Line# A = 1st shift B = 2nd shift Engine number
Electric Start • Since the beginning of June, 2005 Engines used on some mowers equipped with the electric start feature are no longer being equipped with a stator to recharge the batteries • A charger is equipped with the mower and will be needed to maintain an adequate charge to the battery pack
Maintenance ONLY TORCH SPARK PLUGS Torch model F6RTC or F7RTC
Diagnosis: Fuel, Air, Compression, Spark Correct spark plug is: Torch F7RTC or F6RTC There are no alternatives that have been tested and are proven to perform as an equivalent. Visual examination of the spark plug: “read” the plug for indications of lean running, rich running, overheating, electrode erosion, oil fouling. It is not practical to visually check the spark at the gap on a resistor plug: most spark orange.
Maintenance: Valve Lash The engine may run for many years before valve lash adjustment is needed. To check valve lash: • Disconnect and ground the H.T.
Maintenance: Valve Lash Confirm that the piston is at Top Dead Center on the Compression stroke: • Piston at top of travel • Both valves should be closed
Maintenance: Valve Lash • Adjusting nut (fulcrum): 14mm wrench • Jam nut: 10mm wrench • Intake valve: .005”-.007” (.13mm.17mm) • Exhaust valve: .007”-.009” (.18mm.
Diagnosis: Fuel, Air, Compression, Spark Most discussions (and issues) of fuel and air involve the carburetor, and the correct mixing of the two fluids. NOTE: Steel/rubber gasket is embossed with a bowl-vent channel.
Fuel System Throttle-side bowl-vent port Throttle-side bowl-vent channel Small port in gasket leads to additional bowl vent channel In insulator
Fuel System The bowl comes off easily Drain bolt Gasket Bowl bolt O-ring
Fuel System The float should sit level, though it is not readily adjustable. Note that the fuel entry port in the central column is well above the bottom of the bowl. This makes the carburetor fairly resistant to sediment and water.
Fuel System The tip of the float valve and the compression spring are both subject to wear, and should be replaced when the carburetor is disassembled for cleaning.
Fuel System The main jet screws into the central column, retaining the emulsion tube.
Fuel System The lip of the idle speed screw retains the pilot metering plug. Idle speed screw Pilot metering plug The long leg to the central column supplies fuel to the pilot passage. The shorter leg on the fuel-inlet side feeds air to the emulsion tube.
Fuel System The metering plug can be carefully priedout of the carburetor body.
Fuel System The metering plug contains a small metal orifice that regulates fuel flow. Metering plug O-ring End view: metering plug Air passage Orifice Air flow is regulated by the orifice in the emulsion air port.
Fuel System • Fuel and air meet at the metering plug • From there they feed the transition ports • Further down-stream is the pilot port Metering plug Transition ports Pilot port Pilot air orifice
Fuel System 1 Roll-over valve 49-state compliant tractors have rollover valve fuel tank vents. This is what they look like.
Fuel System 2 Vent line from roll-over valve 49-state compliant tractors have roll-over valve fuel tank vents. This is the other end of the vent line.
Fuel System 3 Tethered fuel caps: EPA phase-3 compliance includes tethered fuel caps.
Fuel System 4 To carburetor Charcoal canister To intake elbow California compliant tractors have rollover valve fuel tank vents and charcoal canisters.
PCV System The PCV chamber is located under the flywheel PCV Chamber
PCV System Within the PCV chamber: A baffle works to separate the oil from the air A disc covers the port that leads to the crankcase, acting as a check valve A port high in the chamber passes pressure pulses to the PCV hose Baffle in cover Disc Port to PCV hose
PCV System The disc is kept in place by bosses around the port, and a dimple above it, in the PCV chamber cover.
PCV System • Folded mesh screen within the chamber captures the oil mist • Oil accumulates in the screen and drips to the bottom of the chamber
PCV System A drain port under the screen allows de-aerated oil to drip back into the crankcase.
Operator Controlled Reverse Dash Panel Key Switch This system will eventually be installed on all our riders
Sorting-out the alphabet soup: In Cub Cadet, Cadet it is called “Revtek”, Revtek with OCR Technology Troy-bilt, bilt they call it “Reverse Mowing Control (RMC) with OCR Technology” Technology In Yard Man, Man they just call it “OCR” OCR
Featuring: a safe way to mow in reverse
Operator Controlled Reverse How does it work? 1. Start unit normally 2. After unit is running turn key to position #2, this was the former headlight position 3. Press OCR button (Triangle shaped indicator) 4.
Operator Controlled Reverse The unit will mow in reverse until 1 of 3 things happen: The operator leaves the seat The engine is turned off The key is turned back to the normal mow position (Position # 3)
Operator Controlled Reverse (OCR) Revised ANSI Standard B71.1 taking effect September 1, 2004 states “A means shall be provided that prevents reverse drive operation at a ground speed greater than 1 ft/sec. with powered blade(s). An override capability may be provided to permit reverse drive with powered blades temporarily.
The RMS module is a separate component from the key switch.
The electrical system is largely conventional, other than the RMC module.
IGNITION SWITCH CONFIGURATION G A1 S L A2 G A1 S L A2 B M OFF M G A1 S L A2 B M RUN REVERSE CAUTION NORMAL MOWING MAGNETO M B START LIGHTS GROUND STARTER SOLENOID B G A1 S L A2 G S L M 725-1741 A1 A2 B RUN POWER LIGHT POWER BATTERY IGNITION SWITCH CONFIGURATION
SEAT SWITCH CONFIGURATION TO BRAKE SWITCH, PTO SWITCH, KEY SWITCH, GROUND YELLOW WIRE WITH BLACK TRACE TO RMC MODULE SEAT SWITCH YELLOW WIRE WITH WHITE TRACE CONTACTS OPENCLOSED WHEN SEAT NORMALLY IS OCCUPIED 725-1303 + 725-1439 SEAT SWITCH
SEAT SWITCH 725-1303 725-1439 SEAT SWITCH
REVERSE SWITCH CONFIGURATION WHEN REVERSE IS ENGAGED, PATH TO GROUND IS ESTABLISHED.
REVERSE SWITCH PATH TO GROUND IS COMPLETED WHEN REVERSE IS ENGAGED 725-1303 725-1439 SEAT SWITCH
BRAKE SWITCH CONFIGURATION CHART MAG GROUND CIRCUIT START CIRCUIT BRAKE SWITCH MAGGROUND GROUNDCIRCUIT CIRCUITCLOSED OPEN / STARTER CIRCUIT CLOSED MAG / STARTER CIRCUIT OPEN BRAKE APPLIED (PLUNGER DOWN) UP) WHENWHEN BRAKE RELEASED (N/C, N/O) (PLUNGER 725-1657A BRAKE SWITCH
BRAKE SWITCH LOCATION When the brake is applied, the switch plunger is depressed 725-1657A BRAKE SWITCH
PTO SWITCH CONFIGURATION CHART MAG GROUND CIRCUIT START CIRCUIT PTO SWITCH MAG / STARTER CIRCUIT CLOSED MAG GROUND GROUND CIRCUIT CIRCUIT OPEN CLOSED / STARTER CIRCUIT OPEN WHEN PTO (PLUNGER DOWN) UP) WHEN PTO ONOFF (N/C, N/O) (PLUNGER 725-1657A PTO SWITCH
PTO SWITCH LOCATION When the PTO is engaged, the switch plunger is released PTO:PTO ONSWITCH 725-1657A PTO SWITCH
A COUPLE OF THINGS TO REMEMBER ABOUT THE RMC MODULE: • The module draws ground from the headlight circuit. The lights are powered by a separate AC circuit of the alternator, and are turned-on whenever the engine is running.
A1 is hot when key in any position but off A2 sends ground signal to module when the key in reverse caution position, enabling the module When the mag primary windings are grounded, ignition turns off SEAT SWITCH DC POWER FROM A1 ON KEY SWITCH GROUND FROM A2 ON KEY SWITCH MAGNETO PRIMARY CIRCUIT MODULE GROUND RMC MODULE TO REVERSE SWITCH TO GROUND IN REVERSE MANUAL PTO 725-04227 RMC MODULE
When the module is enabled, enabled pressing the orange triangular button turns it on When the module is turned-on, on the reverse safety switch is disconnected from the system SEAT SWITCH DC POWER FROM A1 ON KEY SWITCH GROUND FROM A2 ON KEY SWITCH MAGNETO PRIMARY CIRCUIT MODULE GROUND RMC MODULE With the module enabled and turned-on, on it is possible to mow in reverse until: 1. The seat is vacated, closing the contacts on the seat safety switch -OR- 2.
• When the seat is empty, the module disconnects from the A2 Ground, Ground disabling the module • The tractor will then operate as our tractors always have: the engine will turn-off if the blades and reverse gear are engaged at the same time SEAT SWITCH DC POWER FROM A1 ON KEY SWITCH GROUND GROUND GROUND FROM A2 ON BROKEN BROKEN KEY SWITCH MAGNETO PRIMARY CIRCUIT • MODULE GROUND REVERSE SWITCH RMC MODULE When the seat is empty, the contacts will close • If the contacts are closed, current passes-on to
Putting these components together in a manual PTO clutch application: • All the switches operate without relays • Other than the RMC Module, this is a very simple system
STARTER SOLENOID STARTER BATTERY BATTERY STATOR FUSE HEADLIGHTS - + AMMETER FUEL SOLENOID AC OUT PUT REGULATOR / RECTIFIER G A1 S L A2 B M D B C A PARK SWITCH REV. SWITCH KEY SWITCH A1 PWR PARK SW PTO SWITCH (OFF) A2 PWR GROUND MAG REV.
With an Electric PTO: Putting these components together in an Electric PTO clutch application: There is one relay in the system, an electric PTO Clutch, and an electric PTO Switch. The PTO switch is of the two-pole, three throw variety.
STARTER SOLENOID STARTER FUEL SOLENOID BATTERY BATTERY STATOR FUSE ELECTRIC PTO AC OUT REGULATOR / PUT RECTIFIER G A1 S L A2 A A AA M B HEADLIGHTS OFF B B B KEY SWITCH, START C C C RELAY 3 D B D 4 A1 PWR B SEAT SW 5 C A SEAT SWITCH (EMPTY) C A2 PWR A BRAKE SWITCH (BRAKE ON) 1 2 GROUND E. PTO REV.
STARTER SOLENOID STARTER FUEL SOLENOID BATTERY BATTERY STATOR FUSE ELECTRIC PTO AC OUT REGULATOR / PUT RECTIFIER G A1 S L A2 A A AA M B HEADLIGHTS OFF B B B KEY SWITCH, RUN C C C RELAY 3 D B D 4 A1 PWR B SEAT SW 5 C A SEAT SWITCH (EMPTY) C A2 PWR A BRAKE SWITCH (BRAKE ON) 1 2 GROUND E. PTO REV.
STARTER SOLENOID STARTER FUEL SOLENOID BATTERY BATTERY STATOR FUSE ELECTRIC PTO PTO ON AC OUT REGULATOR / PUT RECTIFIER G A1 S L A2 A A A AA M B HEADLIGHTS OFF ON B B B KEY SWITCH, RUN C C C RELAY 3 D D B B D 4 A1 PWR B SEAT SW 5 C C A A SEAT SWITCH SEAT SWITCH (OCCUPIED) (EMPTY) C A2 PWR A BRAKE SWITCH (RELEASED) (BRAKE ON) 1 2 GROUND E. PTO REV.
STARTER SOLENOID STARTER FUEL SOLENOID BATTERY BATTERY STATOR FUSE ELECTRIC PTO AC OUT REGULATOR / PUT RECTIFIER G A1 S L A2 A A A AA M B HEADLIGHTS OFF ON B B B KEY SWITCH, RUN C C C RELAY 3 D D B B D 4 A1 PWR B SEAT SW 5 C C A A SEAT SWITCH SEAT SWITCH (OCCUPIED) (EMPTY) C A BRAKE SWITCH (RELEASED) (BRAKE ON) LATCHED 1 A2 PWR 2 GROUND E. PTO REV.
STARTER SOLENOID STARTER FUEL SOLENOID BATTERY BATTERY STATOR FUSE ELECTRIC PTO AC OUT REGULATOR / PUT RECTIFIER G A1 S L A2 A A A A AA UND O R G BRO KE N B B B M B HEADLIGHTS OFF ON OFF KEY SWITCH, RUN C C C C RELAY 3 D D B B D 4 A1 PWR B SEAT SW 5 C C A A SEAT SWITCH SEAT SWITCH (OCCUPIED) (EMPTY) C A BRAKE SWITCH (RELEASED) (BRAKE ON) RELEASED LATCHED 1 A2 PWR 2 GROUND E. PTO REV.
STARTER SOLENOID STARTER FUEL SOLENOID BATTERY BATTERY STATOR FUSE KEY SWITCH, REVERSE CAUTION ELECTRIC PTO PTO ON AC OUT REGULATOR / PUT RECTIFIER G A1 S L A2 A A A AA M B HEADLIGHTS OFF ON B B B C C C RELAY 3 D D B B D 4 A1 PWR B SEAT SW 5 C C A A SEAT SWITCH SEAT SWITCH (OCCUPIED) (EMPTY) C A2 PWR A BRAKE SWITCH (RELEASED) (BRAKE ON) 1 2 GROUND E. PTO REV.
STARTER SOLENOID STARTER FUEL SOLENOID BATTERY BATTERY STATOR FUSE KEY SWITCH, REVERSE CAUTION ELECTRIC PTO PTO ON AC OUT REGULATOR / PUT RECTIFIER G A1 S L A2 A A A AA M B HEADLIGHTS OFF ON B B B C C C RELAY 3 D D B B D 4 A1 PWR B SEAT SW 5 C C A A SEAT SWITCH SEAT SWITCH (OCCUPIED) (EMPTY) C A2 PWR A BRAKE SWITCH (RELEASED) (BRAKE ON) 1 2 GROUND E. PTO REV.
STARTER SOLENOID STARTER FUEL SOLENOID BATTERY BATTERY STATOR FUSE KEY SWITCH, REVERSE CAUTION ELECTRIC PTO PTO ON AC OUT REGULATOR / PUT RECTIFIER G A1 S L A2 A A A AA M B HEADLIGHTS OFF ON B B B C C C RELAY 3 D B D 4 A1 PWR B SEAT SW 5 C A SEAT SWITCH SEAT SWITCH (OCCUPIED) (EMPTY) C A2 PWR A BRAKE SWITCH SWITCH BRAKE (RELEASED) (BRAKE ON) (APPLIED) 1 2 GROUND E. PTO RV.
STARTER SOLENOID STARTER FUEL SOLENOID BATTERY BATTERY STATOR FUSE KEY SWITCH, REVERSE CAUTION ELECTRIC PTO PTO ON AC OUT REGULATOR / PUT RECTIFIER G A1 S L A2 A A A AA M B HEADLIGHTS OFF ON B B B C C C RELAY 3 D B D 4 A1 PWR B SEAT SW 5 C A SEAT SWITCH SEAT SWITCH (OCCUPIED) (EMPTY) C A2 PWR A BRAKE SWITCH SWITCH BRAKE (RELEASED) (BRAKE ON) (APPLIED) 1 2 GROUND E. PTO REV.
STARTER SOLENOID STARTER FUEL SOLENOID BATTERY BATTERY STATOR FUSE KEY SWITCH, REVERSE CAUTION ELECTRIC PTO G A1 S L A2 A A A A AA B B B AC OUT REGULATOR / PUT RECTIFIER M B HEADLIGHTS OFF ON OFF C C C C RELAY 3 D C B A SEAT SWITCH SEAT SWITCH (OCCUPIED) (EMPTY) D B C A 4 A1 PWR SEAT SW 5 BRAKE SWITCH SWITCH BRAKE (RELEASED) (BRAKE ON) (APPLIED) A2 PWR 1 2 GROUND E. PTO REV.
STARTER SOLENOID STARTER FUEL SOLENOID BATTERY BATTERY STATOR FUSE KEY SWITCH, REVERSENORMAL CAUTION ELECTRIC PTO PTO ON AC OUT REGULATOR / PUT RECTIFIER G A1 S L A2 M A A A A B B B B HEADLIGHTS ON ON OFF C C C C RELAY 3 D C B A SEAT SWITCH SEAT SWITCH (OCCUPIED) (EMPTY) D B C A 4 A1 PWR SEAT SW 5 BRAKE SWITCH SWITCH BRAKE (RELEASED) (BRAKE ON) (APPLIED) A2 PWR 1 2 GROUND E. PTO REV.
STARTER SOLENOID STARTER FUEL SOLENOID BATTERY BATTERY STATOR FUSE KEY SWITCH, REVERSE CAUTION ELECTRIC PTO PTO ON AC OUT REGULATOR / PUT RECTIFIER G A1 S L A2 M A A A A B B B B HEADLIGHTS ON ON OFF C C C C RELAY 3 D C B A SEAT SWITCH SEAT SWITCH (OCCUPIED) (EMPTY) D B C A 4 A1 PWR SEAT SW 5 BRAKE SWITCH SWITCH BRAKE (RELEASED) (BRAKE ON) (APPLIED) A2 PWR 1 2 GROUND E. PTO REV.
STARTER SOLENOID STARTER FUEL SOLENOID BATTERY BATTERY STATOR FUSE KEY SWITCH, REVERSE CAUTION ELECTRIC PTO PTO ON AC OUT REGULATOR / PUT RECTIFIER G A1 S L A2 M A A A A B B B B HEADLIGHTS ON ON OFF C C C C RELAY 3 D C B A SEAT SWITCH SEAT SWITCH (OCCUPIED) (EMPTY) D B C A 4 A1 PWR SEAT SW 5 BRAKE SWITCH SWITCH BRAKE (RELEASED) (BRAKE ON) (APPLIED) A2 PWR 1 2 GROUND E. PTO REV.
Now we’ve seen how it works, and it is time to put that knowledge to work for us in a diagnostic exercise: Å Use symptoms to direct search Å RMC module is a handy starting point because it is central to the system Å Reminder: RMC module is not tied into the starter circuit in any way
Question #1: What is it doing (or not doing)? Å Confirm symptoms yourself…ALWAYS Å Test all safety systems before letting any service work out the door Å Understand what the system is supposed to do Å Check the simple “preliminaries” like battery voltage Å Give the machine a quick look-over for obvious things like corroded terminals or chafed wires
Question #2: Where do the symptoms point? Å Are there multiple symptoms with a common root? Å Is there obvious physical damage that might be related to the symptoms? Å Know the system: eg.
Question #3: Where do I start? Å One end or the other Å It is reasonable to work from either end of a system in an orderly fashion Å In this system, most of the circuits end at or near the RMC module Å The RMC module is a handy place to start, but by no means the only place to start Å Understand what each component is supposed to do Å Previous experience: good Å Superstition: bad
As it fits in the dash: RMC plug Key Switch
Scenario #1: PTO / Brake / Seat Circuit Å Typical symptoms: Engine turns-off when the seat is occupied, or when the seat is empty and the parking brake is set Å Alternate failure mode: Engine continues running with seat empty and manual PTO engaged, or brake not applied Å Find the junction of the involved circuits
In this case, it is the yellow wire with black trace. Probing it with a DVOM should yield: 1. Continuity to ground when the seat is empty 2. Continuity to ground when the PTO is ON and the brake is released If there is continuity at other times, there is a short. If 1 or 2 are not true, there is a fault.
To identify the short or fault, Trace wire to the pigtail plug: • The Y/Bk wire splits into two Y/Bk wires entering the pigtail plug • One Y/Bk wire continues as Y/Bk • One Y/Bk wire changes to yellow with a white trace (Y/W) RMC Plug Pigtail Pigtail Plug
The Y/W wire leads directly to the seat switch: • Isolate and test Y/W wire for short or fault • Test with switch to confirm contact through switch
A Review of Belt Basics
Normal Wear The belt should have even wear and no shiny or glazing
Types of Wear • Glazing - belt too lose • Deep cracks - radius to small • Small cracks - belt hardened • Separation - oil • Streaked sidewalls - dirty pulley • Tensile break - tension too high, belt pried onto pulley or foreign object damage
Shock Load • Impact load (Blade impacts #1 cause) • Rough PTO engagement
Belt/Pulley Width • Pulley opening up or wore out • Wrong belt • Wrong pulley • Wrong belt • Wrong pulley
Engine Warranty
MTD Dealer Responsibilities • Check for proper lubrication and level. Lack of lubrication or improper lubrication will not be warranted • If carburetor has problems, use the Carburetor Warranty Check List • A bent or damaged crankshaft is not warrantable • Look for signs of over-use or abuse. Engines that fail because of over use or abuse are not warrantable.
MTD Dealer Responsibilities Cont. • If an engine/part is replaced under warranty, the original engine/part may be called-back for evaluation by MTD Vendor Recovery Dept. If so, please return the engine completely assembled.
Carburetor Check List • MUST be completed BEFORE replacing a carburetor under warranty • It MUST be sent in with the carburetor or the claim WILL be denied • The check list is a useful diagnostic tool to help determine what is wrong with the engine
HINT! Warrantable failures usually show up in the first couple of hours of use Failures after the first season are almost never warrantable
Wonder why your engine claims are not getting paid? Here are some examples of actual engine claims that are not warrantable
Claim #1 Purchase date 05/27/2009 Failure Date 06/15/2009 Model Number 11A-41MB006 Engine 1P65M0 Probable cause (as stated by the dealer) Unit will not run off choke. Work performed Checked spark, good. Checked fuel line, good. Try to blow through inlet to carb, very hard. Inlet not letting gas by. Float was good. Seat was installed wrong. Remove and replace carb. R&R air filter check oil. Test run.
Claim #1 Varnish build up Not Warranty
Claim #2 Purchase date None Failure Date 08/01/2009 Model Number 21C-64M1011 Engine 170-T0 Probable cause (as stated by the dealer) Unit surging needs new carb Work performed Installed new carb
Claim #2 Rust Not Warranty
Claim #3 Purchase date 11/15/2008 Failure Date 09/26/2009 Model Number 11A-41MY229 Engine 1P65MC Probable cause (as stated by the dealer) Carburetor failure. Machine starts and it turns off. Work performed Replaced carburetor under warranty. Unit is working properly.
Claim #3 Float has a greenish tint from the algae growth Corrosion from water and/or alcohol in the fuel Not Warranty
Claim #4 Purchase date 06/23/2008 Failure Date 07/23/2009 Model Number 11A-08MA029 Engine 1P61P0 Probable cause (as stated by the dealer) Carb stop running/gas floods Work performed Replaced carb
Claim #4 corrosion corrosion Not Warranty
Claim #5 Purchase date 12/12/2008 Failure Date 09/11/2009 Model Number 11A-41MY229 Engine 1P65MC Probable cause (as stated by the dealer) carburetor Work performed WE REPLACE GASKET SET BECAUSE GASKET THAT GOES BETWEEN CARBURATOR WAS BROKEN DID IMPROVE ON MOTOR PERFERMANCE , REPLACE ROLL OVER VALVE AND CARBON CANISTER , MOTOR RUN BETTER REPLACE CARBURATOR AUTHORISED BY MTD TECH
Claim #5 GREEN CORROSION Jet is completed plugged from corrosion Green varnish NOTE: Having an authorization from a MTD Tech does not guarantee the claim will be paid. If the failed parts don’t match what was told to the MTD Tech, the claim will be denied. If the failed parts are obviously not warranty failures, the claim will be denied.
Claim #6 Purchase date 08/25/2008 Failure Date 08/23/2008 Model Number 11A-50MB031 Engine 1P65M0 Probable cause (as stated by the dealer) unit had no compression Work performed check out unit would not start checked for fire & unit firing check for fuel & unit had fire check compression & had none but piston is moving in cyl removed head to check head gasket & was ok called tech & was instructed to replace engine ordered & installed new engine add oil run test & fill out warranty claim
Claim #6 Engine was run with bad fuel Varnish in the throat of the carburetor Intake valve opening has carbon build up Intake runner is completely carboned up Carbon build up on intake valve Not Warranty
Claim #7 Purchase date 09/30/2008 Failure Date 06/09/2009 Model Number 12A-18MC056 Engine 1P70FUA Probable cause (as stated by the dealer) Engine leaks fuel at the carburetor. Found carburetor was flooding and fuel was in the crankcase. Engine oil was diluted. Found no dirt in the fuel. Float level was correct. Replace carburetor as per Cub Tech. Work performed Replace carburetor and air filter. Test engine operation.
Claim #7 Not warranty!
Engine Replacement Warranty Process MTD Service Centers 1. The dealer must make a thorough inspection using specific diagnostic techniques to determine whether the engine must be replaced 2. The Central Distributor will gather the claim number from the dealer and attach it to the replacement order. Each Central is responsible for maintaining an available supply of engines to be used for warranty repairs 3.
Engine Replacement Warranty Process MTD Service Centers 4. The dealer MUST submit a copy of the properly completed warranty claim form to the Central Distributor. Each Central will need this information so that the Customer Service Center can create a replenishment order. Any copy of a claim form received without COMPLETE information will be returned to the Central Distributor without a re-order placed 5.
Model and Serial Number Model and Serial Number
Service Kits, Advisories, and Supplements
What’s the Difference ? ÅService Kits Generally involve parts that will be sent as a complete package with instructions. ÅService Advisories Generally involve no parts, parts that a dealer would typically stock, or parts that are readily available from a reputable local source.
The Dealer Portal How to use the Dealer Portal – online interactive training http://service.mtdproducts.
The Dealer Portal Dealer Portal Login at: https://www.mtdtech.
