Troy-Bilt 42012, 42031, 42010 Slip Differential Adjustment, Gear Shift Rod Adjustment, Maintenance

Section 5: Maintenance

	AQ
AT	AS	AR
Fig. 5-12

T

U

AY

Fig. 5-13

	AV
	N
Fig. 5-14	ZZ

5.Remove the auger drive belt from the lower drive pulley (AO).

6.Remove the belt from unit.

To install the auger drive belt:

1.Position the auger drive belt (AD) down through gap. Position the belt into the lower drive pulley (AO).

2.Position the auger drive belt (AD) into pulley (AE). Reinstall the belt guide (AC) and secure.

3.Reinstall bolt (BD), leaving 1/16" (1.5mm) clearance between underside of bolt head and front edge of pulley (AE). Tighten jam nut (BC) against engine crankcase.

4.Perform the auger drive belt adjustment as necessary.

5.Reinstall the belt cover and bolts.

Slip Differential Adjustment

1.On right side of unit, remove hub cap (AQ, Fig. 5-12) at end of wheel axle shaft. Remove outer (AR) and inner jam nuts (AS) and both pairs (four single disk springs) of disk springs (AT). Inspect springs and replace them if they are worn.

2.Reinstall disc springs (AT) and inner jam nut (AS). Tighten jam nut (AS) by hand until it contacts the disc spring, then tighten (AS) 1 to 1-1/4 turns more. DO NOT force nut more than 1- 1/4 turns or differential will not work.

3.Secure the inner nut (AS) in place, while tightening the outer nut (AR).

4.Reinstall cover (AQ).

Gear Shift Rod Adjustment

1.Move the gear shift lever (AU, Fig. 5-9) to position No. 5. Remove the hairpin cotter and the flat washer from the pivot block (N, Fig. 5-14). Disconnect the pivot block (N) from the gear shift lever plate (AV, Fig. 5-14).

2.Pull the gear shift control rod (AA, Fig. 5-10) down completely.

3.While holding the gear shift control rod down (AA), loosen the jam nut (ZZ, Fig. 5-14) and thread the pivot block (N) up or down as needed so it fits into the hole in the gear shift lever plate (AV).

4.Reinstall the pivot block into the gear shift control lever hole and secure with the washer and hairpin cotter. Secure the jam nut (ZZ) against the pivot block (N).

5.Move the gear shift control lever (AU, Fig. 5-9) through the full range of travel. Check for binding. Refer to the drive disk clearance adjustment below, if needed.

Drive Disc Clearance Adjustment

If the gear shift rod lever does not move freely through all the gear positions, adjust clearance (AY, Fig. 5-13) as follows:

1.Loosen the jam nut (AW, Fig. 5-10). Rotate the adjusting screw (AX) until the rubber drive wheel (T, Fig. 5-13) contacts the metal drive disk (U).

2.Turn the rubber drive wheel (T) and the metal drive disk (U) to find the point of minimum clearance (AY). (This is where both the drive wheel [T] and metal disk [U] are touching.)

3.Adjust the disks at the point of minimum clearance. Loosen adjusting screw (AX) 1/2 turn. Secure the adjusting screw (AX) in place, while tightening the jam nut (AW).

4.Check the clearance (AY, Fig. 5-13) by moving gear shift lever (AU, Fig. 5-9) through all positions. Repeat step 3 as necessary.

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