Operator’s Manual Auto Drive Lawn Tractors Models 604G & 604H IMPORTANT: Read safety rules and instructions carefully before operating equipment. Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-covered, brush-covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting applicable local or state laws (if any).
TABLE OF CONTENTS Content Customer Support Important Safe Operation Practices Tractor Set-Up Operation Making Adjustments Page 2 3 7 9 15 Content Maintenance Attachments & Accessories Illustrated Parts List Warranty Page 17 24 26 Back Cover FINDING MODEL NUMBER This Operator’s Manual is an important part of your new lawn tractor. It will help you assemble, prepare and maintain the unit for best performance. Please read and understand what it says.
SECTION 1: IMPORTANT SAFE OPERATION PRACTICES WARNING: This symbol points out important safety instructions which, if not followed, could endanger the personal safety and/or property of yourself and others. Read and follow all instructions in this manual before attempting to operate this machine. Failure to comply with these instructions may result in personal injury. When you see this symbol—heed its warning.
27. Use only accessories and attachments approved for this machine by the machine manufacturer. Read, understand and follow all instructions provided with the approved accessory or attachment. 28. Data indicates that operators, age 60 years and above, are involved in a large percentage of riding mowerrelated injuries. These operators should evaluate their ability to operate the riding mower safely enough to protect themselves and others from serious injury. 29.
b. Never fill containers inside a vehicle or on a truck or trailer bed with a plastic liner. Always place containers on the ground away from your vehicle before filling. c. When practical, remove gas-powered equipment from the truck or trailer and refuel it on the ground. If this is not possible, then refuel such equipment on a trailer with a portable container, rather than from a gasoline dispenser nozzle. d.
SECTION 2: SLOPE GAUGE FO LD O ND OTT ED L I NE 15° NTIN G A 15 °S LO P E OR A FENCE POST A CORNER OF A BUILDING A POWER POLE SIGHT AND HOLD THIS LEVEL WITH A VERTICAL TREE , RE P RE SE WARNING Do not mow on inclines with a slope in excess of 15 degrees (a rise of approximately 2-1/2 feet every 10 feet). A riding mower could overturn and cause serious injury.
SECTION 3: TRACTOR SET-UP NOTE: This manual covers specifications of two models. Please follow instructions and parts numbers pertaining to your tractor only. Attaching the Battery Cables NOTE: If these cables are already attached, proceed to “Attaching Steering Wheel.” IMPORTANT: The positive battery terminal is marked Pos. (+). The negative battery terminal is marked Neg. (–). 1.
WARNING: Before operating this machine, make sure the seat is engaged in the seat stop, stand behind the machine and pull back on seat until fully engaged into stop. 2. Slide the seat slightly rearward in the seat pivot bracket, lining up the rear slots in the pivot bracket with the remaining two holes in the seat’s base. 3. Select desired position for the seat, and secure with the two knobs removed earlier. See Figure 3.
SECTION 4: OPERATION Know the Controls Read this owner’s manual and safety rules before operating your lawn mower. Compare figure below with your lawn tractor to learn about the loction and purpose of various controls and adjustments. Save this manual for future reference. It is very important to follow the instructions and operate the controls properly.
Throttle Control Lever The throttle control lever controls the speed of the engine. When set in a given position, the throttle will maintain a uniform engine speed. Fast IMPORTANT: When operating the tractor with the cutting deck engaged, throttle control lever must always be in the FAST (rabbit) position. Choke Control The choke control can be found on the left side of the dash panel and is activated by pulling the knob outward.
Headlights • • To turn on the headlights, rotate the same ignition key from ON position to ON/LIGHTS position of the ignition switch. To turn off the headlights, rotate the ignition key from ON/LIGHTS position to either ON position (to leave the engine running) or OFF position (to shut the engine off). WARNING: Never move the key into the Start position while the engine is running. Doing so may cause damage to your engine’s starter.
• To change to the reverse direction when operating with cruise control, depress the brake pedal to disengage the cruise control and bring the tractor to a complete stop. Then place the shift lever in the REVERSE position and depress the drive pedal. Seat Adjustment Lever To adjust the seat forward or backward, loosen the two seat adjustment knobs and reposition the seat to the desired position. Once a comfortable position is found, tighten the adjustment knobs to lock the seat in place.
Starting the Engine NOTE: Refer to the TRACTOR SET-UP on page 7 manual for gasoline and oil fill-up instructions. 1. 2. 3. 4. 5. Insert the tractor key into the ignition switch. Disengage the PTO (Blade Engage) lever. Engage the tractor’s parking brake. Pull the Choke Control knob outward. Turn the ignition key clockwise to the START position. After the engine starts, release the key. It will return to the ON position.
• • • • • • For best results it is recommended that the first two laps be cut with the discharge thrown towards the center. After the first two laps, reverse the direction to throw the discharge to the outside for the balance of cutting. This will give a better appearance to the lawn. Do not cut the grass too short. Short grass invites weed growth and yellows quickly in dry weather. Mowing should always be done with the engine at full throttle.
SECTION 5: MAKING ADJUSTMENTS WARNING: Never attempt to make any adjustments while the engine is running, except where specified in the operator’s manual.Disconnect spark plug wire(s) and ground against the engine before performing any adjustments, repairs or maintenance. Seat WARNING: Before operating this machine, make sure the seat is engaged in the seat stop, stand behind the machine and pull back on seat until fully engaged into stop. Seat Knob 1. Flip the seat up as shown in Figure 7. 2.
1. With the tractor parked on a firm, level surface, place the deck lift lever in the top notch (highest position) and rotate the blade nearest the discharge chute so that it is parallel with the tractor. 2. Measure the distance from the front of the blade tip to the ground and the rear of the blade tip to the ground. The first measurement taken should be between 1/4" and 3/8" less than the second measurement.
SECTION 6: MAINTAINING YOUR LAWN TRACTOR WARNING: Before performing any maintenance or repairs, disengage PTO, move shift lever into neutral position, set parking brake, stop engine and remove key to prevent unintended starting. Engine Refer to the engine manual for engine maintenance instructions. • Check engine oil level before each use as instructed in the engine manual. Read and follow instructions carefully. Refer to this manual for details about type and grade of oil.
tractor and/or its serviceability. WARNING: Before servicing, repairing, or inspecting, always disengage PTO, move shift lever into neutral position, set parking brake, stop engine and remove key from tractor to prevent unintended starting. Tire Pressure IMPORTANT: Never exceed the maximum inflation pressure shown on the sidewall of the tire. • The recommended operating tire pressure is approximately 10 psi for the rear tires and 14 psi for the front tires.
4. Connect the other end of the negative (-) cable to the engine block of the stalled tractor, away from the battery, and stand back. 5. Start the stalled tractor and leave it running to charge the battery. 6. Disconnect the negative (-) jumper cable from the tractor. 7. Disconnect the other end of the negative (-) jumper cable from the negative (-) post of the good battery. 8. Disconnect the positive (+) jumper cable from the positive (+) post of the good battery. 9.
IMPORTANT: Each cutting blade edge has to be ground equally to maintain proper blade balance. A poorly balanced blade will cause excessive vibration, may damage the tractor and/or result in personal injury. Hex Flange Nut Wood Block Blade separation Worn blade edge Wind Wing Sharpen edge evenly 5/8" m inimum Spindle Assembly Figure 14 5. Test the blade by balancing it on a round shaft screwdriver. Grind metal from the heavy side until it balances evenly. 6.
IMPORTANT: When removing the battery, disconnect the NEGATIVE (Black) wire from its terminal first, followed by the POSITIVE (Red) wire. Re-install in reverse order. Upper Drive Belt 1. Locate the transmission idler pulley on the upper drive belt by looking through the battery tray opening. See Figure 15. 2. Grasp the bracket and pivot the transmission idler pulley toward the rear of the tractor to release tension on the upper drive belt. 3. Remove the belt from around the transmission idler pulley. 4.
After replacing the drive belts, adjust the drive pedal on your tractor as follows: Idler Adj. Rod 1. Locate the speed control assembly on the underside of the steering support bracket. See Figure 17. 2. Remove both hairpin clips from the pin which is fastened to the speed control assembly (be careful not to lose the small flat washers found on the pin). See Figure 17. 3. Remove the drive pedal return spring. 4. Using two 9/16" wrenches, remove the pin from the speed control assembly. See Figure 17. 5.
4. 5. 6. 7. Remove the PTO belt from around the engine pulley and the PTO idler pulley. Grasp the deck idler pulley and pivot it toward the left side of the deck to relieve tension on the deck belt. Remove the belt from around all pulleys, including the deck idler pulley. Route the new belts as in Figure 18 & Figure 19. Remount belt guards removed earlier.
SECTION 7: OFF-SEASON STORAGE WARNING: Never store the machine or fuel container indoors where there is an open flame, spark or pilot light such as on water heater, furnace, clothes dryer or other gas appliance. • Clean and lubricate the tractor as instructed on page 17 before storing for an extended period. WARNING: Drain fuel only into an approved container outdoors, away from an open flame. Allow engine to cool. Extinguish cigarettes, cigars, pipes, and other sources of ignition prior to draining fuel.
SECTION 8: TROUBLESHOOTING Trouble Possible Cause(s) Corrective Action Engine fails to start 1. 2. 3. 4. 1. 2. 3. 4. Place PTO lever/knob in OFF position. Engage parking brake. Connect wire(s) to spark plug. Place throttle lever to CHOKE position. 5. 6. PTO lever/knob engaged. Parking brake not engaged. Spark plug wire(s) disconnected. Throttle control lever not in correct starting position. Fuel tank empty, or stale fuel. Blocked fuel line. 5. 6. 7. 8. Faulty spark plug. Engine flooded. 7. 8.
SECTION 9: PARTS LIST FOR MODELS 604G & 604H 13 11 25 28 24 38 17 20 22 35 14 39 4 1 12 29 37 7 30 36 19 4 A 18 27 34 3 4 B 1 3 19 10 18 21 31 33 17 20 1 22 22 15 5 8 19 2 4 B A 9 6 26 32
Models 604G & 604H REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 PART NO. 710-3015 710-0599 712-0324 710-0895 710-0924 710-0376 712-0292 712-0429 726-0201 783-0808A 731-1978 731-1979 747-1132A 731-1980A 731-1981C 731-1982C 736-0329 736-0342 783-04323 736-3078 710-0809 710-1611B REF. NO. 22 23 24 25 26 27 28 29 30 31 32 33 34 35 DESCRIPTION Hex Cap Screw, 1/4-20 x .75 Self-tapping Screw, 1/4-20 x .5 Hex Lock Nut, 1/4-20 Self-tapping Screw, 1/4-15 x .75 Pan Phillips Screw, 1/4-20 x .
Models 604G & 604H 39 44 28 6 29 30 13 36 35 6 31 37 38 14 47 49 34 51 11 27 33 28 41 46 40 6 24 14 2 18 18 43 8 32 6 12 23 17 21 10 20 19 21 22 24 6 45 43 25 3 1 26 5 4 15 28 9 7
Models 604G & 604H Ref. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 Part No.
Models 604G & 604H 40 23 24 31 19 6 38 21 14 20 4 2 20 13 22 11 8 13 22 18 7 30 15 12 5 28 1 30 11 3 2 10 17 27 39 34 33 25 9 16 26 32 32 37 36 29 30
Models 604G & 604H Ref. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 — — — — — 37 38 39 40 Part No.
Models 604G & 604H 19 37 6 4 13 IMPORTANT: For a proper working machine, use Factory Approved Parts. V-belts are designed to engage and disengage safely. A substitute (non OEM) V-belt can be dangerous by not disengaging completely.
Models 604G & 604H Ref. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 Part No.
Models 604G & 604H 2 3 5 8 6 7 8 4 9 11 10 13 12 21 20 12 11 19 18 16 17 15 22 3 23 24 14 25 28 26 27 29 34
Models 604G & 604H Ref. Part No. No. 1 732-0614 2 716-0231 3 736-0336 736-0337 736-0349 4 736-0335 5 710-1325 6 719-04017 7 711-1109 8 741-0335 9 717-1464 10 716-0108 11 741-0340 12 721-0338 13 618-04041 14 741-0336 15 717-1362 16 717-1363 17 718-0228 18 736-0519 19 711-04053 20 736-0495 21 741-0337 22 611-0011 23 741-0862 24 732-0863 25 719-04018 26 717-0678 27 761-0202 28 710-1206 29 661-0001 — 737-0148 Description Ring, Wire Ring, E Type, .750 Flat Washer, 5/8 x 1.0 x .030* Flat Washer, 5/8 x 1.0 x .
Models 604G & 604H 55 50 60 54 61 18 51 52 62 22 55 53 63 32 4 11 1 58 56 57 17 55 58 5 A 11 59 64 47 26 14 23 26 7 39 23 7 23 10 13 10 A 2 2 33 40 13 34 A 31 34 12 34 30 16 24 43 24 16 3 24 16 44 45 12 34 30 19 24 21 16 16 20 42 46 48 41 36 27 49 36 8 27 8 29 28 25 9 6 27 11 Model 604H Model 604G 36 24 15 11 20 29 35 37
Models 604G & 604H Ref. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Part No. Description 17962 Switch Plate 647-0064 Lever Assembly: PTO Engage 683-0450 Plate Assembly: PTO Engage 710-0224 AB Screw #10-16 x 0.5 710-0276 Carriage Screw: Special 710-0520 Hex Bolt 3/8-16 x 1.5 710-0726 AB Screw 5/16-12 0.75 710-0831 Hex Bolt 3/8-16 x 5.5 710-3029 Hex Bolt 7/16-20 x 1.
Models 604G & 604H 11 9 7 (for choke) 13 9 24 4 12 23 18 20 19 3 22 2 6 REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 PART NO. 710-0227 710-0599 710-0604A 710-1237 710-1314A 710-1315 712-3017 721-0460 726-0205 725-0157 736-0300 751B221535 751-0535 751-0564 751-0616 751-0650 751-0651 751-3140 751-3141 751-3142 783-0615B 783-0625C 712-0271 746-1086 21 DESCRIPTION Self-tapping Screw, #8-18 x .5 Self-tapping Screw, 1/4-20 x .5 Self-tapping Screw, 5/16-18 x .
STARTER MAGNETO AFTERFIRE SOLENOID ALTERNATOR ALTERNATOR OIL SENSOR BLK LOW OIL INDICATOR LIGHT HEADLIGHTS HEADLIGHTS BLK FUSE 20 AMP RED SOLENOID 725-1426 RED BLU ORG/WHT YEL/BLK RED YEL WHT GRN FUSE 20 AMP YEL/WHT ORG/BLK S A2 BRAKE SWITCH 725-1657A M L ORG PARKING BRAKE INDICATOR LIGHT PTO SWITCH 725-1657A PTO INDICATOR LIGHT A1 B G BRAKE SWITCH OFF 4 3 PTO OFF TRACTOR UNOCCUPIED DESCRIPTION Conditions as shown: MECHANICAL REVERSE KILL Ammeter KEY SWITCH OF
Model 604G 12 34 15 24 8 20 2 38 41 42 20 10 34 16 17 45 10 57 31 C 37 37 22 32 61 58 26 C 39 B 63 60 23 62 25 44 7 5 46 19 56 55 6 29 21 3 43 4 30 13 36 17 15 19 28 40 27 33 1 9 16 18 16 50 54 49 51 32 48 47 35 11 14 40
Model 604G Ref. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Part No. Ref. No. Description 711-04069 Grass Catcher Pin, 1/4-20 618-0565 Spindle Assy., 5.75 Dia. w/ Fitting 683-0198G 42-inch Deck Shell 683-0254 Deck Adj. Bracket w/ Weld Nut 736-0140 Flat Washer, .385 x .62 x .063 710-0520 Hex Cap Screw, 1/4-20 x 1.5 710-0528 Hex Cap Screw, 5/16-18 x 1.25 710-0726 Self-tapping Screw, 5/16-12 x .75 710-0751 Hex Cap Screw, 1/4-20 x .
Model 604H 41 1 7 13 35 34 7 C 39 13 1 28 42 4 A 21 1 32 20 17 6 3 2 17 24 22 B 18 23 11 15 20 32 9 13 19 29 25 14 43 44 5 10 11 45 37 8 47 38 46 B 48 A 31 7 C 30 49 12 12 12 42 30
Model 604H Ref. No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Part No. 618-04137 683-0254 683-04103 710-0347 710-0514 710-0528 710-0599 710-0751 710-1260A 711-04069 712-0324 712-0417A 712-0431 712-0641 712-3006 712-3083 714-0111 717-04074 726-0233 732-0306A 732-0594A 734-0973 736-0119 736-0270 Ref. No. 25 27 28 29 30 31 32 34 35 36 37 38 39 40 41 42 43 44 45 46 47 Description Pulley-Spindle Assembly Deck Hanger Bracket Assembly Deck Assembly Hex Bolt 3/8-16 x 1.
MANUFACTURER’S LIMITED WARRANTY FOR: The limited warranty set forth below is given by MTD LLC with respect to new merchandise purchased and used in the United States, its possessions and territories. “MTD” warrants this product against defects in material and workmanship for a period of two (2) years commencing on the date of original purchase and will, at its option, repair or replace, free of charge, any part found to be defective in materials or workmanship.
