OPERATOR AND PARTS MANUAL Snowblower Model 7420, 8420 & 8420G 042014 FK331
Table of Contents - 7420, 8420 & 8420G Snowblower Table of Contents Introduction..................................................................................................................................4 Safety.............................................................................................................................................5 • Safety.................................................................................................................................
Introduction - 7420, 8420 & 8420G Snowblower Introduction Allied has years of snowblower manufacturing expertise and thousands of acreages, farms and cities depend on Allied snowblowers. PTO-driven Allied snowblowers attach to a tractor’s 3-point hitch. This snowblower is supplied with Category 1 pins with conversion bushings to Category 2 available. The 7420 and 8420 snowblowers have open gearboxes. The Y8420G has an oil bath gearbox. Adjustable side mounted skid shoes are standard on all models.
Safety - 7420, 8420 & 8420G Snowblower Safety Safety Instructions Remember, YOU are the key to safety. Good safety practices not only protect you, but also the people around you. Make these practices a working part of your safety program. Be certain that everyone operating this equipment is familiar with the recommended operating and maintenance procedures and follows all the safety precautions. Most accidents can be prevented. Do not risk injury or death by ignoring good safety practices.
Safety - 7420, 8420 & 8420G Snowblower General Safety Instructions • • • • • • • • • Have a first-aid kit available for use and know how to use it. Have a fire extinguisher available, stored in a highly visible location, and know how to use it. Wear appropriate protective gear.
Safety - 7420, 8420 & 8420G Snowblower Transport Safety • • • • • Review Transport Safety instructions in tractor manual before moving. Check with local authorities regarding transport on public roads. Obey all applicable laws and regulations. Make sure the SMV (Slow Moving Vehicle) emblem and all the lights and reflectors that are required by the local highway and transport authorities are in place, are clean, and can be seen clearly by all overtaking and oncoming traffic.
Safety - 7420, 8420 & 8420G Snowblower Safety Signs • • • The following illustration shows the approximate location and detail of safety signs. Keep all safety signs clean and legible and replace any that are damaged or missing. When original parts are replaced, any safety signs affixed to those parts should be replaced as well. Replacement safety signs are available from your local dealer. Installation • To install safety signs, ensure the installation area is clean and dry.
Assembly - 7420, 8420 & 8420G Snowblower Assembly Instructions 1. 740: Turn the bottom tube weldments (907213) as shown in drawing and slide them into the sleeve welded to the main body. 840 & 840G: Turn the bottom tubes (907250) as shown in drawing and slide them into the sleeve welded to the main body. All sizes: The correct position for each individual tractor will be determined when mounting the snowblower on the tractor.
Assembly - 7420, 8420 & 8420G Snowblower 6. Mounting Snowblower on Tractor -- Mount the snowblower on a tractor with a Category 1 or Category 2 hitch. -- Using tape or a bright colored marking pen, mark on the outer shields the position where the shaft is completely pushed together and the position where you have a 4" overlap. Watch these marks when moving the blower through all possible operating angles to see that the PTO shaft stays within this range.
Assembly - 7420, 8420 & 8420G Snowblower 7. PTO Shield: -- All snowblowers are supplied with a PTO shield. Bolt the shield (965410) to the hinges on the top of the gearbox on both the 740 and 840 snowblowers using 1/4" x 1/2" hex bolts, lock washers and hex nuts. Insert a 3/16" cotter pin in the hole in the shield and in the hole at the bottom corner of the gearbox. Fold back the cotter pins to hold them in place. Hook the ends of the spring (960135) into these cotter pins to hold the shield down.
Operation - 7420, 8420 & 8420G Snowblower Operation Instructions 1. Do not operate the snowblower in the fully raised position. The 3-point hitch on some tractors raises high enough to cause the PTO shaft to bind. This can cause damage to the PTO shaft and/or to the hitch and pins. NOTE: PTO shaft angle should not exceed 20° for optimum performance and life. Damage may occur to PTO and/or snowblower if angle becomes more extreme. 2.
Operation - 7420, 8420 & 8420G Snowblower CAUTION Always check to see that both ends of the PTO shaft are securely attached as per instructions every time you are preparing to use the snowblower. 10. When replacing bearings or tightening a loose bearing collar, always tighten collar in the direction of shaft rotation using a center punch or a similar tool. 11. Shear Sprocket: The shear sprocket (965826) should be checked at the beginning of every season to make sure it will spin freely.
Maintenance - 7420, 8420 & 8420G Snowblower Maintenance Refilling 840G Gearbox with Oil • • • 14 If the gearbox requires refilling with oil because of repairs to the gearbox, add oil to the level shown in the drawing. Check the level regularly using the plug in the lid. The correct level is even with the bottom of the plug.
Bolt Torque - 7420, 8420 & 8420G Snowblower Bolt Torque Checking Bolt Torque The tables shown below give correct torque values for various bolts and hex bolts. Tighten all bolts to the torques specified in chart unless otherwise noted. Check tightness of bolts periodically, using bolt torque chart as a guide. Replace hardware with the same strength bolt. Bolt Torque* Bolt Diameter Grade 2 Bolts Grade 5 Bolts Grade 8 Bolts (inches) SAE 2 SAE 5 SAE 8 “A” (lb-ft) (N.m) (lb-ft) (N.m) (lb-ft) (N.
Bolt Torque - 7420, 8420 & 8420G Snowblower Hydraulic Fittings Jam Nut or Straight ORB Fitting Torque SAE 37° (JIC) Swivel Nut Torque Dash Size Thread Size (lbs-ft) (NM) (lbs-ft) (NM) -4 (1/4) 7/16-20 16 - 14 20 - 22 11 - 10 13 - 15 -5 (5/16) 1/2-20 20 -18 24 - 27 15 - 13 18 - 20 -6 (3/8) 9/16-18 26 - 24 33 - 35 19 - 17 23 - 26 -8 (1/2) 3/4-16 60 - 50 68 - 78 38 - 34 47 - 52 -10 (5/8) 7/8-14 80 - 72 98 - 110 56 - 50 69 - 76 -12 (3/4) 1-1/16-12 135 - 125 170 - 183 7
59 14 16 34 47 62 61 33 5 37 20 15 59 16 34 47 75 36 76 6 8 7 67 8 6 7 72 57 45 52 26 29 30 15 51 10 15 56 93 14 69 70 62 71 84 26 26 48 23 90 77 73 83 50 31 85 63 15 56 25 66 34 18 22 26 58 23 74 24 14 64 71 60 23 73 23 22 Parts - 7420, 8420 & 8420G Snowblower 7420 & 8420 Snowblower Drawings 17
Parts - 7420, 8420 & 8420G Snowblower 8420G Snowblower Drawings Check Oil Level Decal 95 23 50 96 20 18 23 95
30 35 38 3 9 9 99 98 94 12 13 42 1 16 11 98 17 86 98 82 97 41 49 44 39 7 43 7 53 92 89 44 46 81 79 8 8 32 40 28 32 27 16 78 28 27 39 65 88 28 55 87 55 32 3 28 32 19 27 27 28 74" Models Hitch 32 28 84" Models Hitch (Optional 74" Models) 27 54 40 27 43 32 54 68 55 4 65 Parts - 7420, 8420 & 8420G Snowblower 19
Parts - 7420, 8420 & 8420G Snowblower When Ordering Parts Always give your dealer the Model, Color and Serial Number of your machine to assist them in ordering and obtaining the correct parts. Use the exploded view and tabular listing of the area of interest to exactly identify the required part. 20 Item Part Number 1 811792 Bolt Hex 0.375 x 1.50 Description Qty 8 2 812363 Nut Lock (Steel) 0.375 Grb Pl 8 3 815263 74" Hitch LHS 1 4 815264 74" Hitch RHS 1 5 81527 Bolt Hex 0.25Nc x 1.
Parts - 7420, 8420 & 8420G Snowblower Item Part Number 33 84498 Description Qty 1/4" Lock Nut (Pl) 1 34 86170 Hex Bolt 0.375 Unc x 1.0 12 35 812639 Washer Flat 0.
Parts - 7420, 8420 & 8420G Snowblower 22 Item Part Number 68 966527 Description 7/8" x 2-1/2" Hex Bolt (Pl) Qty 2 69 9812410 3/8" Lock Washer 4 70 9812356 Bolt Hex 3/8" Nc 1.
Parts - 7420, 8420 & 8420G Snowblower 8420G Snowblower Gearbox Drawing Item Part Number Description BU50506 Gearbox Complete 1 BU50310 Gearbox Casting Only 2 BU500089-3 3 BU50457 4 BU500167-1 5 BU50458 Gearbox Gasket 6 BU50508 Cross Shaft 7 BU50502 Pinion Shaft 8 BU50329 Bevel Gear - 1-1/2" Bore Pipe Plug Gearbox Cover Relief Valve 9 BU50331 Bevel Gear - 1-3/8" Bore 10 BU50428 Staking Lock Nut 11 BU50444 Staking Lock Nut 12 BU50422-1 Oil Seal (3 Used) 13 BU50415 Re
Parts - 7420, 8420 & 8420G Snowblower Snowblower PTO Drawing 24
Parts - 7420, 8420 & 8420G Snowblower Item Part Number F842 Description Standard PTO Shaft Complete 936263 Tractor Half of PTO (Shear) 936264 Implement Half of PTO (Clamp Yoke) 1 936277 Shear Assembly 2 936199 Safety Slide Lock Repair Kit 3 936249 (Collar, Spring, Ret.
Parts - 7420, 8420 & 8420G Snowblower Optional Long PTO Shaft Item Part Number F844 Description Long PTO Shaft Complete (Optional) 936285 Tractor Half of PTO (Shear) 936280 Implement Half of PTO (Clamp Yoke) 1 936277 Shear Assembly 2 936199 Safety Slide Lock Repair Kit 3 936249 (Collar, Spring, Ret.
Parts - 7420, 8420 & 8420G Snowblower 1.75 x 5 Cylinder Assembly Drawing (Optional) Item Part Number 24930M - Description Cylinder Complete X3913 Seal Kit F9117 Spout Deflector Cylinder & Hose Kit 1 116984 Hose 3/8 x 120 c/w Fittings 2 24930M Cylinder 1.75 Dia x 5.0 9/16 Orb 3 960913 Clevis Pin 0.500 x 1.813 Pl 4 9812430 Cotter Pin 0.125 x 1.
Optional Kits - 7420, 8420 & 8420G Snowblower Optional Kits Hand Crank Spout Rotation Assembly Use picture below or exploded view on next page for reference Open Gearbox Models Closed Gearbox Models Hand Crank Unit Correct Ring Gear Orientation Empty Holes Empty Holes Use these holes Use these holes P-Clamps for use with Hydraulic Deflector Control 1. Empty hole Bolt horizontal brace (816893) to crank bracket (816895) using the supplied hardware (81570, 81344, & 86171). 2.
Optional Kits - 7420, 8420 & 8420G Snowblower Operation, Maintenance and Troubleshooting 1. Ensure all hardware remains tight or function of unit may become impaired. 2. Keep gears lubicated. 3. If equipped with optional hydraulic chute control, ensure hoses are not interfering with the gears. Item Part Number 1 81344 Lock Nut (Nylon) 0.375 Nc Description Qty 9 2 815250 P-Clamp For 3/4 Od, .406 Hole 2 3 81531 Bolt Hex 0.25 Nc x 2.00 Gr5 Pl 1 4 81570 Washer 0.
Optional Kits - 7420, 8420 & 8420G Snowblower Hydraulic Spout Rotation Assembly Use picture below or exploded view on next page for reference Hose Holder for use with Hydraulic Deflector Control Correct Ring Gear Orientation Hydraulic Spout Rotation Unit Hose Parts 1. Bolt manifold (816919) to the motor (971518) using 5/16" socket head bolts (967249). Make sure o-rings are in place after disposable protective shield is removed. 2.
Optional Kits - 7420, 8420 & 8420G Snowblower Operation, Maintenance and Troubleshooting 1. Ensure all hardware remains tight or function of unit may become impaired. 2. Keep gears greased. 3. If equipped with optional hydraulic chute control ensure hoses are not interfering with the gears. 4. Ensure proper hydraulic fluid level in tractor. 5.
Parts - 7420, 8420 & 8420G Snowblower Shipping Kit and Bundle Numbers The following is a list of Kit Numbers for this product and the Bundle Numbers, Descriptions, and Quantities for each Kit.
Warranty - 7420, 8420 & 8420G Snowblower Allied by Farm King Limited Warranty This document limits your warranty rights. Base Limited Warranty Buhler Industries Inc. provides this warranty only to original retail purchasers of its product. Buhler Industries Inc. warrants to such purchasers that all Buhler Industries Inc.
Warranty - 7420, 8420 & 8420G Snowblower Authorized Dealer and Labor Costs Repairs eligible for labor under this limited warranty must be made by Buhler Industries Inc. or an authorized Farm King dealer. Buhler Industries Inc. retains the exclusive discretion to determine whether it will pay labor costs for warranty repairs or replacements, and the amount of such costs that it will pay and the time in which the repairs will be made. If Buhler Industries Inc.
Warranty - 7420, 8420 & 8420G Snowblower (Note that some provinces or states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidental or consequential damages, so the above limitations and exclusion may not apply to you.) This warranty gives you specific legal rights and you may also have other rights, which vary from province to province or state to state. Buhler Industries Inc.
www.farm-king.com 1330 43rd Street NW Fargo, ND USA 58102 Ph.: 701.282.7014 | Fax: 701.282.5865 Toll Free: 888.524.1004 E-mail: info@buhler.com www.farm-king.com Equipment shown is subject to change without notice. ©2014 Buhler Trading Inc. Printed in USA. TSX:BUI a division of Buhler Industries Inc.
