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27

SERVICE AND ADJUSTMENTS

CAUTION

:  Before servicing or adjusting 

the snow thrower, shut off the engine,  remove 
the spark plug wire(s), set the parking brake 
and remove the key from the tractor ignition.

FIGURE 61

FIGURE 60

REPLACING AUGER BELT

•  Disengage the tractor's attachment clutch.
•  Lower the snow thrower to the ground.
•  Remove the clevis pins. See figure 54 on page 23.
•  Lock the snow thrower's lift handle in the down 

position to decrease belt tension. 

•  Release the spring tension from the auger belt idler 

arm on the bottom of the clutch/idler assembly.

•  Remove the auger drive belt from the clutch/idler 

assembly and from the spiral auger housing.

•  Install new belt over top of large auger drive pulley 

and under the two side idler pulleys. Twist the belt 1/4 
turn to seat the "V" of the belt in the groove of each 

idler pulley. Refer to figure 55 on page 23.

•  Assemble the belt onto the clutch/idler assembly. 

SKID SHOE ADJUSTMENT

•  The skid shoes are mounted on each side of the spiral 

auger housing. They regulate the distance the scraper 

plate is raised above the plowing surface. When 
removing snow from a gravel driveway or and uneven 
surface, it is advisable to keep the scraper plate as 
high above the surface as possible to prevent possible 
damage to the spiral auger. On blacktop or concrete 
surface, keep the scraper plate as close to the surface 
as possible.

•  Raise the snow thrower off the ground and place a 

block under each end of the scraper plate. Loosen the 
six hex nuts securing the skid shoes to the housing. 
Adjust the skid shoes up or down and retighten the 
nuts securely. Adjust both skid shoes to the same 
height to keep the housing and the scraper plate level. 

See figure 60. 

LIFT RELEASE CABLE ADJUSTMENT

•  If the lift rod does not lock the snow thrower securely 

in the transport position, loosen the upper hex nut on 

the lift bracket a few turns and tighten the lower hex 

nut. Refer to figure 48 on page 21.

•  If the lift rod fails to unlock completely to lower the 

snow thrower, loosen the lower hex nut on the lift 

bracket a few turns and tighten the upper hex nut. 

Refer to figure 48 on page 21.

CLUTCH DISENGAGEMENT ADJUSTMENT

(For tractors with engagement rod clutches only.
Not for electric clutches or cable clutches) 

If the spiral auger on the snow thrower does not stop 

when the attachment clutch lever on the tractor is 
disengaged, then adjustment is necessary. Proceed as 
follows. Refer back to figure 33 on page 16.
•  Place the attachment clutch lever in the disengaged 

position.

•  Remove the hairpin cotter from the engagement rod 

trunnion and lift the trunnion out of the hole in the idler 

arm.

•  Screw the trunnion a few turns towards the front end 

of the rod.

•  Replace the trunnion into the hole in the idler arm and 

secure it with the hairpin cotter.

 

Check the operation of the snow thrower. If the spiral 
augers still do not stop, repeat the above steps until 
the augers stop when the attachment clutch lever is 

placed in the disengaged position.

SPIRAL AUGERS

•  The spiral augers are secured to the auger shaft with 

two shear bolts and nylock nuts. If you hit a foreign 
object or if ice jams the augers, the snow thrower is 
designed so that the bolts will shear.

•  If the augers will not turn, check to see if the shear 

bolts have sheared. See figure 61. Two replacement 
shear bolts and nylock nuts have been provided with 
the snow thrower. For future use order part number 
42489 shear bolt and number 47810 nylock nut.

Summary of Contents for LST42F

Page 1: ...M NO 28051 rev 09 07 18 42 SNOW THROWER CAUTION Read Rules for Safe Operation and Instructions Carefully Safety Assembly Operation Maintenance Parts Husqvarna Technical Assistance 800 448 7543 Service...

Page 2: ...8 TROUBLESHOOTING 29 REPAIR PARTS ILLUSTRATION 30 32 34 REPAIR PARTS LIST 31 33 34 SLOPE GUIDE 35 PARTS ORDERING SERVICE BACK COVER IMPORTANT Rear wheel weights and tire chains are required to provide...

Page 3: ...g and operating the snow thrower If the snow thrower starts to vibrate abnormally stop the engine immediately and check for the cause Vibration is generally a warning of trouble Stop the engine whenev...

Page 4: ...L SIZE N K Q A 46938 43084 43182 43661 47631 47630 43350 44215 43682 44326 43080 48106 42849 43003 43088 43081 R19172410 47605 43070 44695 43082 47810 47572 46584 47598 43063 AA GG EE DD CC BB FF LL H...

Page 5: ...houlder Bolt N 2 Shear Bolt spare parts O 7 Lock Washer 3 8 P 7 Washer 1 4 Q 22 Washer 5 16 Extra washers included R 8 Washer 1 2 S 1 Washer 3 8 Thin T 3 Washer 3 8 REF QTY DESCRIPTION U 2 Bowed Washe...

Page 6: ...cket 12 Front Pulley Frame Bracket 2 13 V Belt Drive 56 48138 14 V Belt Drive 55 46989 15 V Belt Auger Attached to Housing Assembly 16 L H Hanger Bracket Outside Mounting 17 R H Hanger Bracket Outside...

Page 7: ...ove the tractor hood Refer to your tractor owner s manual for removal instructions FIGURE 2 RIGHT SIDE VIEW IMPORTANT Right hand R H and left hand L H side of the tractor are determined from the opera...

Page 8: ...BRACKETS AND SHOULDER BOLTS TO OUTSIDE OF FRAME STEP 5 SEE FIGURE 5 Remove the bolt if present in the hole directly behind the brake rod on the left side of the tractor frame Attach the L H Hanger Br...

Page 9: ...Use the longer 56 drive belt 48138 on tractors with manual attachment clutches Slightly loosen the hex bolt next to the flat idler pulley Install the drive belt down between the hex bolt and the flat...

Page 10: ...deck STEP 11 SEE FIGURE 11 Find the cable clip that is attached to the left side of the tractor frame underneath the footrest Open the clip and remove the mower clutch cable Do not remove the clip fro...

Page 11: ...the 5th link of the chain attached to the upper idler arm Install a 3 32 hairpin cotter in the 4th link of the chain attached to the lower idler arm FIGURE 15 STEP 17 SEE TABLE 1 Two different length...

Page 12: ...length belt may cause premature bearing or belt failure DRIVE BELT FLAT IDLER PULLEY HEX BOLTS PIVOT LOCK PIN use second hole SHOULDER BOLT 1 8 HAIRPIN COTTER L H HANGER BRACKET 1 8 HAIRPIN COTTER ENG...

Page 13: ...1 carriage bolt without a nut The bracket fastened to inside of frame must remain in place FRONT SUSPENSION BRACKET REPLACE BOLT IF PRESENT REMOVE BOLTS IF PRESENT FIGURE 20 RIGHT SIDE VIEW INSTRUCTI...

Page 14: ...e frame using a 3 8 x 1 carriage bolt and a 3 8 flanged nut Bolt head goes on inside of tractor frame Repeat for the R H side STEP 28 SEE FIGURE 28 Assemble a shoulder bolt and 3 8 flanged nut to the...

Page 15: ...side of the clutch idler assembly using two 5 16 x 1 hex bolts eight 5 16 washers and two 5 16 nylock nuts for each bracket Attach the two front pulley frame brackets to the inside of the clutch idler...

Page 16: ...4 SEE FIGURE 34 Assemble the short V belt onto the engine pulley and then onto the large pulley on top of the clutch idler assembly The belt must be placed to the inside of the engine pulley keeper th...

Page 17: ...f the chain FIGURE 35 CABLE OPERATED MANUAL ATTACHMENT CLUTCH FIGURE 37 HEX BOLTS DRIVE BELT FLAT IDLER PULLEY 46989 STEP 37 SEE FIGURE 37 Two different length drive belts are included with your snow...

Page 18: ...ctor frame as follows Hook the rear of the assembly onto the two shoulder bolts you installed on the tractor frame Lift the front of the assembly and attach it to the hanger brackets you installed usi...

Page 19: ...BELT PART 48138 TRACTOR TYPE DECK SIZE CLUTCH TYPE LT Lawn Tractor 48 Electric LT Lawn Tractor 38 42 46 Electric TABLE 2 STEP 41 SEE FIGURE 41 Turn the clutch idler assembly upside down Hook the long...

Page 20: ...s you assembled to the inside of the tractor frame Lift the front of the assembly and attach it to the R H and L H hanger brackets using two pivot lock pins and 1 8 hairpin cotters FIGURE 45 RIGHT SID...

Page 21: ...FIGURE 47 RIGHT SIDE VIEW 5 16 NYLOCK NUT 5 16 x 1 3 4 HEX BOLT ASSEMBLY OF THE SNOW THROWER STEP 50 SEE FIGURE 49 Tilt the snow thrower back down to the ground Remove the nylon tie which fastens the...

Page 22: ...e snug but do not dig into the plastic chute keepers Position the crank rod spiral see figure 51 so that it does not rub against the bottoms of the notches in the chute flange Tighten the nuts Turn th...

Page 23: ...passes over the top of the auger pulley and then twists 1 4 turn to pass underneath each side idler pulley The V side of the belt must mate with the grooves of the pulleys FIGURE 56 VIEWED FROM UNDERN...

Page 24: ...reviewthe following checklist to help ensure that you will obtain the best performance from your snow thrower 1 All assembly instructions have been completed with all bolts and nuts properly tightened...

Page 25: ...eared Refer to the Service and Adjustments section Make sure the tractor engine has the correct oil for winter operation SAE 5W 30 Refer to tractor owner s manual HOW TO START YOUR SNOW THROWER The tr...

Page 26: ...For maximum snow removal and discharge maintain high engine r p m full throttle It is advisable to operate the lawn tractor at a slow ground speed 1st gear for safe and efficient snow removal In deep...

Page 27: ...same height to keep the housing and the scraper plate level See figure 60 LIFT RELEASE CABLE ADJUSTMENT If the lift rod does not lock the snow thrower securely in the transport position loosen the up...

Page 28: ...dle in the down position to decrease belt tension Release the spring tension from the auger belt idler arm on the bottom of the clutch idler assembly Remove the auger drive belt from the clutch idler...

Page 29: ...g contact with 4 Allow snow thrower to cool to the snow thrower outdoor temperature before using Front wheels slide instead of steering Snow thrower rides up over snow 1 Object jammed in spiral auger...

Page 30: ...39 8 53 23 65 65 4 1 32 59 10 47 66 45 64 27 27 34 37 19 23 24 30 38 46 46 43 43 21 49 17 48 62 60 63 19 23 13 30 23 30 8 23 15 23 23 23 30 17 23 61 55 44 36 20 22 14 26 18 36 20 68 67 30 38 22 33 21...

Page 31: ...td Wrt 31 47615 2 Bearing Flange 32 42844 1 Bearing Ball 33 43182 1 Hex Bolt 5 16 18 x 3 4 34 42953 4 Bearing Split 3 4 35 24279 2 Skid Shoe REF PART NO QTY DESCRIPTION 36 48015 4 Washer Nylon 37 2745...

Page 32: ...11 12 12 13 13 14 14 16 17 17 18 18 27 25 25 31 31 32 33 36 44 70 63 49 53 52 44 44 41 42 45 39 46 47 30 43 48 51 50 54 55 7 58 18 63 63 63 56 66 64 62 62 40 52 19 53 65 65 59 59 5 37 34 35 59 38 59...

Page 33: ...1 8 32 25678 1 Plate Side R H 33 25679 1 Plate Side L H 34 49916GY 1 Tube Lift Handle 35 49912 1 Trigger and Lift Cable Assembly 36 43070 2 Washer 3 8 REF PART NO QTY DESCRIPTION 37 49266 1 Screw Oval...

Page 34: ...1 Belt V Type Auger 28 47044 1 Pulley V Type 4 29 47025 1 Hex Bolt 5 16 18 x 3 1 2 30 43432 3 Hex Bolt 3 8 16 x 2 1 2 31 43054 3 Hex Bolt 3 8 16 x 2 32 24571 1 Spacer 33 24472 1 Spacer Pivot 34 43070...

Page 35: ...manual CAUTION DO NOT OPERATE YOUR TRACTOR AND SNOW THROWER ON A SLOPE IN EXCESS OF 10 DEGREES BE SURE OF YOUR TRACTOR S TOWING AND BRAKING CAPABILITIES BEFORE OPERATING ON A SLOPE AVOID ANY SUDDEN TU...

Page 36: ...ced or transmitted in any form or by any means electronic or mechanical including photocopying or recording or by any information storage or retrieval system without the express written permission of...

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