Walker H12 Operator's Manual
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Walker H12 Operator's Manual

Two-stage snowblower
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H12: 42" Two-Stage Snowblower
H17: 50" Two-Stage Snowblower
Operator's Manual
Safety, Assembly, Operating and Maintanence Instructions
H12 compatible with tractor models: MC, MD, MT
H17 compatible with tractor models: MH
Please Read and Save These Instructions
For Safety, Read All Assembly and Opeartion Instructions
Prior to Operating Attachment
H12 Beginning S/N: 21508289
H12 Effective Date: 03.25.15
H17 Beginning S/N: 21516633
H17 Effective Date: 09.22.15
P/N: 6670-14

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Summary of Contents for Walker H12

  • Page 1 H12: 42” Two-Stage Snowblower H17: 50” Two-Stage Snowblower Operator’s Manual Safety, Assembly, Operating and Maintanence Instructions H12 compatible with tractor models: MC, MD, MT H17 compatible with tractor models: MH H12 Beginning S/N: 21508289 H12 Effective Date: 03.25.15 Please Read and Save These Instructions...
  • Page 2 Foreword Thank you. . .for purchasing a Walker Two-Stage Snowblower. Every effort has been made to provide you with the most reliable machine on the market, and we are sure you will be among our many satisfied customers. If for any reason this product does not perform to your expectations, please contact your local dealer. Every customer is important to us.

  • Page 3: Table Of Contents

    Walker Manufacturing recommends that any service requiring special training or tools be performed by an authorized Walker Mower Dealer. There are several general practices to be aware of in the area of safety. Most accidents associated with the operation or maintenance of a Walker product are caused by disregarding basic safety precautions or specific warnings.

  • Page 4: Safety Instructions

    Failure to follow safety instructions contained in this manual may result in personal injury or damage to equipment or property. If you have any questions concerning setup, operation, maintenance, or safety, please contact your authorized Walker Mower dealer or call Walker Manufacturing Company at (970) 221-5614.

  • Page 5: Before Operating

    Replacement Operator’s Manuals are available by sending the model and serial number to: Walker Manufacturing Company 5925 E. Harmony Road Fort Collins, CO. 80528 2.

  • Page 6: Operating

    12. Handle gasoline or diesel fuel with care. Gasoline is highly flammable and its vapors are explosive: a. Use an approved fuel container. b. Never add fuel to a running engine or hot engine (allow hot engine to cool several minutes). c.

  • Page 7: Maintenance

    14. Never adjust gauge wheels or skid shoes with the engine running. Before adjusting height or servicing, disengage the PTO clutch, stop the engine, and remove the ignition key. Wait for all movement to stop before getting off the seat. NOTE: The PTO brake should stop drive line rotation within five (5) seconds of disengaging the PTO clutch.
  • Page 8 5. If the engine must be running to perform a maintenance adjustment, keep hands, feet and clothing away from moving parts. Do not wear jewelry or loose clothing. 6. Always use proper engine service manuals when working on the engine. Unauthorized maintenance operations or modifications to the engine may result in unsafe operating conditions.
  • Page 9 GLOSSARY There are many terms that are either unique to this equipment or that are used as acronyms. The following terms and their definitions will help while using this manual. • FORWARD SPEED CONTROL (FSC) controls the maximum forward speed of the tractor; functioning as a cruise control.
  • Page 10 Two Adjustable, Replaceable Skid Shoes, Adjustable from 1/4 to 3/4 in. (6 to 19 cm) * H12 with model MT, H17 with model MH NOTE: The manufacturer reserves the right to make changes in specifications shown herein at any time...
  • Page 11 Deflector Deflector Position Control Knob Chute Hand Guard Chute Rotation Handle Gearbox Support Bracket Auger Gearbox Auger Frame Two-Stage Snowblower Front View and Right Side View (Not Installed)
  • Page 12 Deflector Deflector Position Control Knob Chute Chute Rotation Handle Snowblower Housing Reduction Box Cover Skid Shoe Skid Shoe Female Quick Hitch PTO Drive Shaft Two-Stage Snowblower Rear View (Not Installed)

  • Page 13: Decals

    Decals SAFETY, CONTROL, AND INSTRUCTION DECALS Safety, Control, and Instruction Decals are installed on the machine; if any are missing, illegible, or damaged, a replacement should be ordered and installed before putting the machine into operation. The Decal Part Number is listed below. Safety Decal: Rotating Driveline Safety Decal: Keep Hands Out Location: Discharge Chute...
  • Page 14 AND OPEN FLAME. Shut off engine before NEVER ALLOW PASSENGERS ON THE ATTACHMENT. servicing. Important Decal: Use Shear Bolts Decal: Walker Decal Location: Snowblower Housing Location: Inside Housing Behind Auger Part Number: 5800-9 Part Number: 657346 (RAD) IMPORTANT...

  • Page 15: Assembly

    Assembly 1. Remove the rear shaft support from the chute base lip and discard the existing bolt. Refer to Figure 1.2 to locate the rear shaft support. 2. Place the plastic anti-friction insert over the chute base as shown in Figure 1.1. Only one position provides a perfect fit.
  • Page 16 6. Insert two (2) 5/16 x 1 in. carriage bolts through each of the skid shoes from inside the bend. Place a flat washer, lock washer, and nut loosely on each bolt and place the bolt heads through the round holes in the outer ends of the bottom angle of the snowblower body as shown in Figure 1.4.
  • Page 17 Drive Shaft 1/4 x 1/4 x 1-1/4 Key Set Screw PTO Drive Shaft Yoke Figure 1.6: Attach PTO Drive Shaft Yoke to Snowblower Drive Shaft 9. Slide the drive shaft yoke over the drive shaft. 10. Secure the yoke to the drive shaft with a 1/4 x 2-1/2 in. bolt and nylon locknut. Tighten the nut and the 3/8 x 3/8 in.

  • Page 18: Installation

    Installation 1. Grease the drive shaft spline sliding surfaces and slide the PTO coupler (tractor half) onto the shaft as shown in Figure 2.1. Figure 2.1: Install PTO Coupler on Drive Shaft 2. Retract the spring-loaded quick disconnect ring on the PTO Coupler and insert the Coupler Installation Tool (provided in Owner’s Packet) as shown in the Figure 2.2.
  • Page 19 3. Insert the male quick hitch section of the implement hitch into the female socket of the snowblower as shown in Figure 2.3 and Figure 2.4. Male Hitch Female Socket Figure 2.3: Male To Female Hitch Connection Figure 2.4: Hitch Connected To Snowblower 4.
  • Page 20 H19: Locking/Removing Implements • Locking: Rotate the hitch lock lever fully backward to the LOCKED position as in Figure 2.7. • Removing: Move the hitch lock lever forward to the UNLOCKED position as in Figure 2.8. Locking Lever Locking Lever UNLOCKED LOCKED Figure 2.7: H19 Locking Lever in “LOCKED”...
  • Page 21 IMPORTANT: To prevent damage to the mower, make sure the PTO quick disconnect is securely locked on the tractor, with the locking balls fully seated in the groove and the ring in the locked position (refer to the Quick Disconnect Ring “Locked”...
  • Page 22 Handle Grip Figure 2.15: Install Handle Grip 9. For GHS (Grass Handling System) equipped Walker tractors, install a blower intake cover (P/N 5595-2) in the blower intake tube. The cover “unloads” the blower and seals the intake to effectively eliminate power loss and noise when the blower is not being used.
  • Page 23 10. Counterweight should be installed on the tail of the tractor for stability when transporting the tractor with the snowblower in raised position. Optional tail weights for the various tractor models are available from your Walker dealer, or a sandbag or similar weight may be used.

  • Page 24: Operation

    Operation PREOPERATION CHECKLIST Before operating the snowblower for the first time, and as a routine before daily operations, it is important to make sure the machine is properly prepared and ready for operation. The following is a list of items to be checked.

  • Page 25: Snowblower Controls

    CHECK CHUTE AND DEFLECTOR • Make sure the chute and deflector are not clogged with snow and/or ice. • Turn the chute rotation handle and rotate the chute. The chute should rotate freely. • Loosen the deflector position knobs to raise and lower the deflector. The deflector should move freely.
  • Page 26 Deflector Position Knobs Set the angle of the deflector according to the distance the snow must be thrown. To adjust the deflector angle: 1. Loosen the two knobs on the sides of the deflector. 2. Slide the deflector to the required angle, and securely retighten the two knobs. Deflector Position Knobs Figure 3.2: Deflector Position Knobs...

  • Page 27: Snowblower Operation

    SNOWBLOWER OPERATION CAUTION Before operating the snowblower, read and understand all Safety Instructions and Operating Instructions. WARNING If an implement is installed on the hitch, it must be locked in place before beginning any operation. Engaging the Snowblower 1. Set the engine throttle at about 1/3 speed. DO NOT attempt to engage the PTO clutch at high engine speeds.
  • Page 28 DANGER If the auger strikes a solid object or the machine begins to vibrate abnormally, immediately disengage the PTO clutch, stop the engine, and wait for all moving parts to stop. Disconnect the fuel solenoid wire [diesel engines] or the spark plug wire(s) [gasoline engines] to prevent accidental starting.
  • Page 29 IMPORTANT: DO NOT use the snowblower as a dozer blade to push snow. Let the snowblower work its way through deep snow. If the tractor is driven forward into snow too fast, the snowblower may become overloaded and clog. When snow can be thrown to only one side of an area, use the pattern shown in Figure 3.4. Start on the side farthest from where the snow will be thrown.
  • Page 30 Clogging Checklist In case of clogging, the snow throwing action will decrease and finally stop. When this occurs, disengage the PTO clutch, stop the engine, disconnect the fuel solenoid wire [diesel engines] or spark plug wire(s) [gasoline engines], and remove the ignition key. Make sure all movement has stopped before attempting to unclog. DANGER DO NOT attempt to unclog the snowblower or make any adjustments with the tractor engine running.

  • Page 31: Removing And Storage

    Removing and Storage H10 and H19 Instructions 1. Park the tractor on a level surface and lower the snowblower. 2. Remove the spring clip and clevis pin from the parallel bar at the hitch end, and remove the parallel bar from the implement hitch.

  • Page 32: Maintenance

    Maintenance CAUTION Maintenance procedures requiring special training or tools should be performed by a trained technician. WARNING DO NOT perform any maintenance with the tractor engine running. Disengage the PTO clutch, shut off the machine, and remove the ignition key before performaing any maintenance on equipment.
  • Page 33 4. Wipe the threads of the gearbox plug before reinstalling. 5. Torque to 24 lb-in (3 N•m). Oil Fill Plug Figure 4.1: Oil Fill Plug Snowblower Reduction Chain Lubricate the reduction chain every 25 hours of operation. A light pentrating oil or special purpose chain oil is recommended.
  • Page 34 Ident Location Lubrication Type No. Places Auger Sections Grease Gearbox Oil* Reduction Chain Oil** Sprockets PTO Shaft Assembly Grease (Spline Slide Area) PTO Universal Joints Grease Quick Hitch Pivot Grease Gearbox is permanently lubricated and sealed requiring no scheduled lubrication. Oil level should be checked only when an oil leak is noted.

  • Page 35: Replacing/Repairing Parts

    REPLACING/REPAIRING PARTS WARNING To prevent accidental engine starting when replacing parts or repairing the machine, remove the key from the ignition switch and disconnect the fuel solenoid wire [diesel engines] or the spark plug wire(s) [gasoline engines]. Snowblower Cutting Edge The cutting edge should be rotated or replaced before it is worn to the point that the snowblower housing can make contact with the ground.
  • Page 36 Snowblower Reduction Chain The reduction chain should be replaced if, when adjusted for proper tension, it can be pulled away from the top of the reduction sprocket more than 1/2 the height of a tooth on the sprocket. Running the snowblower with a worn chain increases wear on the sprockets.
  • Page 37 Snowblower Reduction Sprockets A sprocket should be replaced when the teeth become asymmetric (when the front side of a tooth is a different shape than the back side of the tooth) as shown in Figure 4.6. Symmetric (Acceptable) Asymmetric (Replace) Figure 4.6: Reduction Sprocket Wear NOTE: Generally, a small sprocket wears faster than a large sprocket.

  • Page 38: Adjustments

    Replacing Large Sprocket (P/N I161) 1. Remove the PTO guard cover and reduction chain. Refer to REPLACING/REPAIRING PARTS - Snowblower Reduction Chain in this section. 2. Remove the four (4) carriage bolts and nuts securing the reduction box assembly to the frame and remove the reduction box assembly.
  • Page 39 Snowblower Reduction Chain Tension Adjust the tension on the reduction chain as follows: 1. Remove PTO guard covering the reduction box. 2. Loosen the four (4) carriage bolts and nuts securing the reduction box assembly to the frame. 3. Using a pry bar, apply leverage to push the reduction box assembly down to increase tension on the chain.
  • Page 40 H19 Hitch Lock Tension Adjustment After installing an implement onto the hitch, the hitch lock clevis will need to be adjusted according to the following procedure: 1. Adjust the H19 hitch lock clevis to properly secure the implement. To adjust the tension on the tongue latch, remove the bowtie clip and the clevis pin as shown in Figure 4.10, and twist the male clevis clockwise to tighten, or counterclockwise to loosen, as needed.
  • Page 41 This page left intentionally blank...
  • Page 42 H40C11 NOTE: Decals are illustrated in greater detail on pages 6-7 of this 6671-10 U-Joint Shaft Assembly, Spline manual. (Includes Items # 27-29) NOTE: NS items are “Not Sold” by Walker Manufacturing. I395 657763 Decal, Rotating Driveline 6671-1 6671-1 PTO Outer Shield NOTE: O/L indicates “Obtain Locally.”...
  • Page 43 SNOWBLOWER DRIVE COMPONENTS (H12) F113 F447 F113 F020 F309 6 F020 F309 F309 F034 F020 F318 F004 F149 F271 24 6 F020 F309 F034 F255 F020 F020 F020 F255 F309...
  • Page 44 Decal, Walker Round (4-3/4”) I125 669674 Skid Shoe 6625-8 42” Cutting Edge 669690 Frame I205 657332 Worm Gearbox Support 5809-2 2500937 Decal, Walker Logo 5/16-NC x 3/4 Hex Bolt Beginning S/N 21508289 Effective Date 03.25.15 Use only genuine Walker® replacement parts...
  • Page 45 SNOWBLOWER HOUSING COMPONENTS (H12) F020 F169 F169 F381 F049 F020 F032 F032 F032 F032 F032 F381 F381 F381 F036 F051 F005 F175 F381 F016 F020 F168 F051 F174 F174 F175 F051 F168 F020 F016 F020 F020 F020 F168 F020 F168...
  • Page 46 (Includes Items # 25-27) I395 657763 Decal, Rotating Driveline manual. 6671-1 PTO Outer Shield NOTE: All NS items are not sold by Walker Manufacturing. 6651-5 Bearing & Retainer Kit 657346 Decal, Use Shear Bolts NOTE: O/L indicates “Obtain Locally.” I543...
  • Page 47 SNOWBLOWER DRIVE COMPONENTS (H17) F447 F113 F113 4 F168 F020 F309 F020 4 F168 F309 F309 F034 F020 F168 F318 F004 F271 F149 23 F168 F020 F309 F034 F255 F020 F020 F255 F020 F168 F309...
  • Page 48 NOTE: O/L indicates “Obtain Locally.” Reduction Box Assembly I196 669612 PTO Guard 5/16-NC x 1/2 Serrated Flange Bolt I164 657355 Reduction Box I543 0300002 Carriage Bolt, 5/16 x 3/4 Beginning S/N 21516633 Effective Date 09.22.15 Use only genuine Walker® replacement parts.
  • Page 49 SNOWBLOWER HOUSING COMPONENTS (H17) F020 F169 F169 F003 F049 F020 F032 F032 F032 F032 F032 F003 F003 F003 F036 F034 F051 F005 F175 F003 F016 F020 F168 F051 F469 F469 F175 F051 F020 F168 F016 F020 F020 F168 F168 F020 F051 F169...
  • Page 50 OPERATOR’S NOTES...

  • Page 51: Warranty

    (90) days. At Walker’s request, customer will make the defective part available for inspection by Walker and/or return the defective part to Walker, transportation charges prepaid.
  • Page 52 WALKER MFG. CO. 5925 HARMONY ROAD, FORT COLLINS, CO. 80528 - (970)221-5614 FORM NO. 041217 PRINTED IN USA...

This manual is also suitable for:

H17

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