Troy-Bilt 42030, 42031 Wheel Drive Belt Replacement, Shear Bolts, Maintenance, adjustment above

Section 5: Maintenance

length of spring (W, Fig. 5-6) again. The spring length should now measure 5/8" – 3/4" (15–19mm) longer than the measurement taken in step 2. If it does not, loosen jam nut (Y, Fig. 5-6) and turn adjuster (Z, Fig. 5-6) to increase or decrease the spring length. (1-1/4 turns of the adjuster equals 1/16" [1.5mm] of spring extension.) Hold the adjuster and tighten the jam nut (Y) when the correct spring length is obtained. Re-check measurements and adjust if needed.

If after completing this adjustment the wheels do not drive adequately, refer to “Drive Disc Clearance Adjustment” on page 25. Then repeat this adjustment.

Wheel Drive Belt Replacement

To remove the wheel drive belt:

1.Remove the bolts (AB, Fig. 5-3) and the belt cover from the unit.

2.Remove the two bolts securing belt guide (AC, Fig. 5-8) to the engine. Remove the belt guide.

3.Loosen jam nut (BA) and remove bolt (BB).

4.Release tension on the idler (AF). Remove the auger drive belt (AD, Fig. 5-8) from the auger drive pulley (AE).

5.Remove wheel drive belt (AG) from lower drive pulley (AH). Squeeze the wheel drive control lever against the handlebar (X, Fig. 5-3) to increase the gap between lower pulleys as needed.

6.Remove the belt from unit.

To install the wheel drive belt:

1. Position the belt into lower drive pulley

closest to the engine.

G

			Y
			Z
		V
			W
Fig. 5-6			Q
	O		AC
			BA
			BB
			AE
			AH
Fig. 5-7		P	AG
	C
5. Perform the wheel drive disc			AF
			AD
adjustment (above).			Fig. 5-8
6. Reinstall the belt cover and bolts.

2.	Place the belt into the groove closest
	to the engine. Reinstall the auger drive
	belt in its pulley.
3.	Position the belt guide (AC) back on
	the engine and secure with bolts
	removed earlier.
4.	Reinstall bolt (BB), leaving 1/16"
	(1.5mm) clearance between underside
	of bolt head and front edge of pulley
	(AE). Tighten jam nut (BA) against
	engine crankcase.

Shear Bolts

Special shear bolts (C, Fig. 5-7) secure the augers to auger shaft and are designed to break (shear) if the auger jams. This prevents damage to other, more vital parts. Inspect the shear bolts before each use and replace them if they are worn or broken.

Torque shear bolts to 11 ft-lbs (15 Nm).

CAUTION

USING ANYTHING BUT ORIGINAL EQUIPMENT SHEAR BOLTS COULD RESULT IN DAMAGE TO THE UNIT. USE AUGER SHAFT SHEAR BOLTS PART NUMBER 1735625, WHEN REPLACING SHEAR BOLTS.

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