Yard-Man 31AH553G401 User Manual

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). If a spark arrester is used, it should be maintained in effective working order by the operator. In the State of California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized service dealer or contact the service department, P.O. Box 368022 Cleveland, Ohio 44136-9722.
ECO No. 1281
770-10028B (10/2000)
Content Page
Important Safe Operation Practices...................................................................3
Assembling Your Snow Thrower .......................................................................5
Know Your Snow Thrower.................................................................................8
Operating Your Snow Thrower ..........................................................................10
Making Adjustments ..........................................................................................12
Maintaining Your Snow Thrower........................................................................13
Service ..............................................................................................................14
Parts List............................................................................................................18
This Operator’s Manual is an important part of your new Snow Thrower. It will help you assemble, prepare and maintain the unit for best performance. Please read and understand what it says.
Before you star t to prepa re yo ur sno w thr ower for its first use, please locate the model plate and copy the information from it in this Operator’s Manual. The information on the model plate is very important if you need help from your dealer or the MTD customer support department.
You can locate the model number by looking at the lower frame cover on the rear of your snow thrower. A sample model plate is explained below. For future reference, please copy the model number and the serial number of the equipment in the space below.
(Model Number)
(Serial Number)
Copy the model number here:
Copy the serial number here:
P.O. BOX 368022
If you have difficulty assembling this product or have any questions regarding the controls, operation or maintenance of this unit, please call the Customer Support Department.
Call 1- (330) 220-4MTD (4683) or 1- (800)-800-7310 to reach a Customer Support representative. Please have your unit’s model number and serial number ready when you call. See previous section to locate this information. You will be asked to enter the serial number in order to process your call.
For more details about your unit, visit our website at www.mtdproducts.com
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.
WARNING: Engine Exhaust, some of its constituents, and certain vehicle components contain or emit
chemicals known to State of California to cause cancer and birth defects or other reproductive harm.
DANGER: This machine was built to be operated according to the rules for safe operation in this
manual. As with any type of power equipment, carelessness or error on the part of the operator can result in serious injury. This machine is capable of amputating hands and feet and throwing objects. Failure to observe the following safety instructions could result in serious injury or death.
Tra in in g
1. Read, understand, a nd follow all in struction s on the machine and in the manual(s ) before a ttempting to assemble and o perate. Keep this ma nual in a safe pl ace for future and regular re ference a nd for orde ring replacement parts.
2. Be familiar with all controls and their prope r operation. Know how to stop the mach ine and d isengage them quickly.
3. Never allow childre n under 14 y ears old to operate this machine. Children 14 years old and over should rea d and understand the op eration in struction s and sa fety rules i n this manual and should be trained and sup ervised b y a parent.
4. Never allow adults to operate this machine without proper instruction.
5. Thrown objects can cause seriou s personal injury . Plan your snow throwin g pattern to avoid di scharge of mat erial toward roads, bystanders and the like.
6. Keep bystanders, hel pers, pets and chi ldren at l east 75 feet from the machin e while it is in operatio n. Stop machine if anyo ne enters the area.
7. Exercise caution to avoid s lipping o r falli ng, espe cially when operating in reverse.
1. Thoroughly inspect the area wh ere the eq uipment i s to be used. Remove all door mat s, newspa pers, sle ds, boards, wires and o ther foreig n object s which c ould be tripped over or throw n by the auger/imp eller.
2. Always wear safet y glasses or eye s hields d uring operation and while performing an adjustment or repair to protect your eyes. T hrown ob jects whi ch ricochet can cause serious inj ury to the eyes.
3. Do not operate wit hout wearing adequate winter outer garments. Do not wear jewelry, long scarves or other loose clothing which cou ld becom e entang led in m oving parts. Wear footwear w hich wi ll improve footing on slippery surfaces.
4. Use a grounded three wire ex tension cord and receptac le for all units with electric start engi nes.
5. Adjust collector housing height to clear gravel or crushed rock surfaces.
6. Disengage all cl utch levers before st arting the engin e.
7. Never attempt to m ake any adjustme nts while engine i s running, except where spec ifically recomm ended in the operator’s manual.
8. Let engine and m achine adju st to outd oor tem perature before starting to clear snow.
9. To avoid personal injury or pro perty damage use extre me care in handling gasolin e. Gasol ine is e xtremely flammable and the v apors are explosiv e. Serious personal injury c an occur w hen gas oline is spilled o n yourself or your c lothes which c an ignit e. Wash y our skin and change clot hes immedi ately.
a. Use only an approved gasoline container. b. Extinguish all cigarettes, cig ars, pipes and other
sources of ignition. c. Never fuel machine indoo rs. d. Never remove gas cap or add fue l whil e the
engine is hot or running. e. Allow engine to cool at leas t two minu tes before
refueling. f. Never over fill fuel tank. Fil l tank to no more tha n
½ inch below bottom of fill er neck to provide space
for fuel expansi on. g. Replace gasoli ne cap an d tighten secu rely. h. If gasoline is sp illed, wip e it off th e engine and
equipment. Move machine to another area . Wait 5
minutes before start ing the e ngine. i. Never store the machine or fuel containe r inside
where there is an o pen flam e, spark or pilot l ight
(e.g. furnace, water heater, space heate r, clothes
dryer etc.). j. Allow machine to cool 5 minute s before storin g.
1. Do not put hands o r feet near rotating p arts, in the a uger/ impeller housing o r disc harge chu te. Cont act wit h the rotating parts can am putate ha nds and feet.
2. The auger/impelle r clutch lev er is a safety de vice. Nev er bypass its operati on. Doing so, makes the ma chine unsafe and may cause p ersonal i njury.
3. The clutch leve rs must o perate easily in both d irections and automatical ly return to the disengaged pos ition when released.
4. Never operate with a miss ing or da maged di scharge chute. Keep all safe ty devic es in pl ace and working.
5. Never run an engine indoors or in a poorly vent ilated area. Engine exhaust contains carbon monoxide , an odorless and dea dly gas .
6. Do not operate mac hine while under the influenc e of alcohol or drugs.
7. Muffler and engine be come hot and c an cause a burn. D o not touch.
8. Exercise extreme ca ution when operating on or cro ssing gravel surfaces. Stay alert for hidden hazards or traffic.
9. Exercise caution w hen changi ng directi on and w hile operating on slop es.
10. Plan your snow t hrowing pat tern to av oid disc harge towards windows, wa lls, cars e tc. To avoid prope rty damage or personal injury caus ed by a ricochet.
11. Never direct disc harge at c hildren, b ystander s and pet s or allow anyone in front of t he machi ne.
12. Do not overload machine capa city by attemptin g to clear snow at too fast of a rate.
13. Never operate this machin e without good visib ility or light. Always be sure of your footi ng and k eep a firm hold on the handles. Walk, n ever run.
14. Disengage power to t he aug er/impeller w hen transporting or not in use.
15. Never operate mach ine at hi gh transp ort speeds on slippery surfaces. Look down and b ehind an d use ca re when in reverse.
16. If the machine shoul d start to vibrate abn ormally, stop the engine, disconnect the spark plug an d grou nd it agai nst the engine. Inspect thoroughly for dam age. Repair any damage before starting and ope rating.
17. Disengage all cl utch lev ers and st op engin e before y ou leave the operating position (be hind the handles). Wai t until the auger/im peller come s to a complete stop befo re unclogging the d ischarge chute, m aking an y adjustments, or inspecti ons.
18. Never put your hand in the d ischarge or colle ctor openings. Always use a cl earing to ol to unc log the discharge opening.
19. Use only attach ments a nd acce ssories approved by the manufacturer (e.g. wheel weigh ts, tire c hains, cabs etc.) .
20. If situations occur which are not covered in this manua l, use care and good judgment. Cont act your dealer or telephone 1-800-800-73 10 for assistance and the name of your nearest s ervicing dealer.
Maintenance And Storage
1. Never tamper with safety devices. Check their proper operation regularly.
2. Disengage all cl utch lev ers and stop engi ne. Wait u ntil the auger/impelle r come to a complet e stop. D isconn ect the spark plug wi re and grou nd again st the en gine to prevent unintended starting before cl eaning, repairi ng, or inspecting.
3. Check bolts, and sc rews for pro per tig htness at frequent intervals to keep t he ma chine in safe worki ng condi tion. Also, visually inspe ct mach ine for an y damag e.
4. Do not change the engi ne governor settin g or over-speed the engine. The g overnor c ontrols the m aximum s afe operating speed o f the eng ine.
5. Snow thrower shave plates an d skid shoes are subj ect to wear and damage. F or your s afety protecti on, freque ntly check all compon ents and replace with origin al equipment manuf acturer’s (O.E.M.) parts only. Use of parts which do not m eet the ori ginal eq uipment specifications may lea d to imp roper perfor mance an d compromise safety.
6. Check clutch co ntrols period ically to verify they engage and disengage prope rly and adjust, if ne cessary. Refer to the adjustment s ection i n this op erator’s man ual for instructions.
7. Maintain or replace safety and instruction labels, as necessary.
8. Observe proper disposal l aws and regulations for ga s, oil, etc. to protect the environmen t.
9. Prior to storing, run machine a few minutes to clear snow from machine an d prevent freeze up of auger/i mpeller.
10. Never store the machine or fuel c ontainer i nside whe re there is an open flame, spark or pilot light such as a wate r heater, furnace ,cloth es dryer etc .
11. Always refer to the operator’s ma nual for p roper instructions on off-season storage.
Your Responsibility:
Restrict the use of this p ower ma chine to persons wh o read, understand and fo llow the w arnings and ins tructions in this manual and on t he mach ine. The s afety la bels ar e given below for your refer ence.
Remove screws from the top sides and ends of the shipping crate.
Set panel aside to avoid tire punctures or personal injury.
Remove and discard plastic bag that covers unit.
Roll unit out of crate.
Check crate thoroughly for loose parts before discarding.
Handle Pane l
Loose Parts
The snow throw er is ship ped wi th fo llowi ng lo ose parts in the carton. See Figure 1 for illustration, description of item and part number. Please remove all loose parts from the carton before discarding it.
Shear Bolts (710-0890A)
Hex Lock Nuts (712-0429)
Figure 1
Please note that these shear bolts and hex lock nuts are not meant for initial assembly of the equipment. If the snow thrower hits a foreign object or ice jam, the bolts, securing the auger shaft, may shear. Use these two shear bolts and nuts as replacement then. Store these in a safe place until needed.
standard hex bolts. Any damage to the auger gearbox or other components from standard hex bolts will not be covered by your snow thrower’s warranty.
NEVER replace the auger shear bolts with
Assembling Handle
Upper Handle
Wing Nuts,
and Bolts
Figure 2
Raise the upper handle assembly in the direction shown in Figure 2. Make sure that the upper handle locks into position over the lower handle.
Carriage Bolt
Tighten these
wing nuts
Wing Nut
Upper Handle
Lower Handle
NOTE: Reference to the left or right side of the s now
thrower in this manual is obser ved from the operator’s position.
later on in this section, before operating your snow thrower. Failure to follow these instructions may cause damage to the snow thrower.
Remove the lower plastic wing nut, cupped washer and carriage bolt from each side of the lower handle. See Figure 2.
Make any final adjustments, as instructed
Figure 3
Look at low er rear of snow throw er frame t o be sure all cables are aligned with cable roller guides.
Secure the upper handle and lower handle with the two plastic wing nuts, cupped washers and carriage bolts previously removed. Attach these hardware on the lower hole in the handles. See Figure 3.
Tighten th e two win g nuts alre ady in plac e on the upper holes and secure the handles firmly. See Figure 3.
Slide the shift rod connector down over the end of the lower shift rod. See Figure 4. Tap the connector until it locks on the lower shift rod.
NOTE: If the conn ector is not prop erly assembled , the shift rod will pivot and y ou will not be able to change direction or speed of the snow thrower.
Lower Handle
Power Lead
Figure 6
Shift Rod
Note: Cut-out view of lower handle shown for clarity.
Upper Shift Rod
Figure 4
If not already attached, slip the cables that run from the handle panel to the chute into the cable guide located on top of the engine. See Figure 5.
Cable Guide
Figure 5
If for shippi ng purpo ses the wir ing harn ess was left unattached to the power lead, follow the steps below to attach it now:
Follow the conduit that holds the wiring harness from under the right side of the handle panel to where the connectors are located at the bottom of the right hand lower handle. See Figure 6.
Plug the wiring harness into the power lead located on the right side of the engine, underneath the fuel tank. See Figure 6 inset.
Final Adjustments
Traction Control and Shift Lever
To check the adjustment of the traction control and shift lever, proceed as follows:
Move the shift lever into sixth (6) position.
With traction control released, gently push the snow thrower forward, then pull it back. The machine should move freely.
Engage traction control, and try to move the machine both forward and back. You should experience resistance.
Move the shift lever into the fast reverse (R2) position and repeat the previous two steps.
If you experienced resistance either when repositioning the shift lever from 6 to R2 or when attempting to move the machine with the traction control released, adjust the traction control immediately. To adjust, proceed as follows:
Loosen the jam nut on the traction control cable and UNTHREAD the cable one full turn.
Recheck a djust ment .
Retighten the jam nut to secure the cable when correct adjustment is reached.
NOTE: For more details, refer to Traction Control Adjustment on page 12.
Auger Control
Check the adjustment of the auger control as follows:
Push down on the auger control until the small rubber bumper contacts the upper handle. There should be slack in the auger control cable.
Release the auger control. The cable should be straight. Make certain you can depress the auger control against the left handle completely.
If adjustment is necessary, proceed as follows:
Loosen the jam nut and thread the cable in (for less slack) or out (for more slack) as necessary. See Figure 7.
“Z” End
Jam Nut
Auger Control Cable
Figure 7
Recheck adjustment; readjust as necessary and tighten the jam nut.
Skid Shoe
The space between the shave plate and the ground can be adjusted by repositioning the skid shoes. For close snow removal, place skid shoes in the low position. Use middle or high position when area to be cleared is uneven. See Figure 8. When operating on gravel, always put skid shoes in the high position.
Adjust skid shoes as follows:
Loosen, but do not remove, the two hex nuts which fasten the skid shoe to the auger housing.
Raise or lower the skid shoe to desired position.
Retighten the hex nuts loosened earlier.
Repeat on the other side of the snow thrower.
Shave Plate
Carriage Bolts
Hex Nuts
Figure 8
NOTE: Make certain the en tire bottom surface of skid
shoe is against the ground to avoid uneven wear on the skid shoes.
Tire Pressure (Pneumatic Tires)
The tires are overinflated for shipping purposes.
Check tire pressure. Maintain pressure between 15 to 20 psi. Refer to tire sidewalls for recommended tire pressure.
NOTE: If the tire pressure is not equal in both tires, the unit may pull to one side or the other.
WARNING: Maximum tire pressure under
any circumstance is 30 psi. Equal tire pressure should be main tained at all times. Exc essive pressure (over 30 psi) when seating beads may cause tire/rim assembly to burst with force sufficient to cause serious injury.
WARNING: B e familiar with al l the controls an d their proper op eration. Know how to stop the mach ine
and disengage them quickly.
See Figure 9 to identify all the controls described below.
Traction Control / Auger
Control Lock
Gas Tank
Steering Control
Left Wheel
Traction Control /
Auger Control Lock
Stay Warm
Grips Switch
Stay Warm Grips
Steering Control
Right Wheel
Figure 9
Traction Control / Auger Control Lock
The traction control is located on the right handle. See Figure 9. Squeeze the traction control to engage the wheel drive. Release to stop.
This same lever also locks the auger control so you can operate the electric chute rotation switch without interrupting the snow throwing process. If the auger control is engaged simultaneously with the traction control, the operator can release the auger control (on the left handle) and the augers will remain engaged. Release the traction control to stop the augers and wheel drive (the auger control must also be released).
changing speeds.
Always release traction control before
Auger Control
The auger control is located on the left handle. Squeeze the clutch grip to engage the augers. Release to stop the snow throwing action. The traction control must also be rel eased in or der to stop the auge r.
Shift Lever
The shift lever is located in the center of the handle panel and is used to determine both ground speed and direction of travel. It can be moved into any of eight positions for speed and direction variations as described below. Always release traction control before changing speeds.
Forward: Your snow thrower has six forward (F) speeds. Position number one (1) is the slowest. Position number six (6) is the fastest.
Reverse: Your snow thrower has two reverse (R) speeds. R1 is the slower, while R2 is faster.
Electric Chute-Rotation Switch
The electric chute-rotation switch is located o n the left side of the snow thrower handle panel. To change the direction in which discharged snow is thrown, proceed as follows:
Push the toggle switch to the left to rotate the chute counterclockwise.
Push the toggle switch to the right to rotate the chute clockwis e.
Release the switch once the chute has completed its rotation cycle in either direction. Failure to do so can result in damage to the electric chute motor and/or its drive gear.
Wheel Steering Controls
The left and right wheel steering controls are located on the underside of the handles and are used to assist in steering the snow thrower. Squeeze the right wheel steering control when turning right; squeeze the left control when turning left. Operate snow thrower in open areas until you become familiar with these controls.
Stay Warm Grips Switch
The Sta y Warm grips switc h is located on the right side of the snow thrower handle panel. To activate the Stay Warm grips, toggle the switch to the right to generate heat within the handles. Toggle the switch to the left into the OFF position after using the snow thrower.
NOTE: The Stay Warm grips are a compliment to, not a substitute for, proper cold weather outerwear for hands. It is recommended that the user wear adequ ate winter protection for hands (like gloves/mittens) when operating this snow thrower.
Chute Tilt Control
The distance snow is thrown can be changed by adjusting the angle of the chute assembly. Move the chute tilt control forward to decrease the distance, toward the rear to increase.
Discharge Chute
The angle of the discharge chute controls the distance that the snow is thrown. Tilt the discharge chute up for greater distance; tilt down for less distance.
Skid Shoe
The position of the skid shoe is determined by the condition of the ground from where snow has to be removed. Refer to page 7 for details.
Fuel Shut-off Valve
The fuel shut-off valve is located under the fuel tank. This valve controls fuel flow from the tank. Always make certain it is in the open (vertical) position before attempting to start the engine. See Figure 10.
The headlight is on whenever the engine is running.
Throttle Control
The throttle control is located on the engine. It regulates the speed of the engine. See Figure 10.
Safety Ignition Key
The safety ignition key must be fully inserted in the switch before the unit will start. Remove key when snow thrower is not in use. Do not attempt to turn the key. See Figure 10.
Throttle Control
Fuel Shu t-Off Valve
Figure 10
Recoil Starter Handle
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