Troy-Bilt 42052 Shear Bolts, Auger Drive Belts Adjustment, Removal, Installation, Maintenance

Section 5: Maintenance

WARNING

Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to come to a complete stop, disconnect spark plug wire and move wire away from spark plug.

Failure to follow these instructions can result in serious personal injury or property damage.

	M
Figure 5-5	L	N

AUGER DRIVE BELT AND WHEEL DRIVE BELT REPLACEMENT

NOTE: The auger drive belt (there is one auger drive belt on the 9.5HP model and two auger drive belts on the 11HP model) must be removed before removing the wheel drive belt. The illustration (Figure 5-

6)shows two auger drive belts (AD), ig- nore the second belt if the unit is not so equipped.

AC
	BA
	BB
	AE
	AH
AG
AF	AD
Figure 5-6	AO

6.Remove wheel drive belt (AG, Figure 5-6) from lower drive pulley (AH). Squeeze wheel drive control lever against handlebar (X, Figure 5-1) to in- crease gap between lower pulleys as needed.

7.Remove the wheel drive belt from unit.

8.If the auger drive belt(s) have been re- placed, then perform the Auger Drive Belt Adjustment as described in this section.

9.Reinstall the belt cover.

SHEAR BOLTS

CAUTION

Using anything but original equipment shear bolts could result in damage to the unit. Use factory-specified auger shaft shear bolts when replacing shear bolts.

Special shear bolts (L, Figure 5-5) secure the augers to the auger shaft and are de- signed to break (shear) if the auger jams. This prevents damage to other, more vital parts. Inspect shear bolts before each use and replace them if they are worn or bro- ken. Torque shear bolts to 11 ft-lbs

(15 Nm).

Removal

1.With the engine stopped and the spark plug wire disconnected, remove the screws and washers (AB, Figure 5-1) and remove the belt cover from the unit.

2.Remove the two screws, flat washers and lockwashers securing belt guide (AC, Figure 5-6) to the engine.

Remove the belt guide.

3.Loosen jam nut (BA, Figure 5-6) and remove bolt (BB).

4.Release tension on the idler (AF, Figure 5-6). Remove the auger drive belt(s) (AD) from the auger drive pul- ley (AE).

5.Remove the auger drive belt(s) from the lower drive pulley (AO, Figure 5-9) and remove belt(s) from unit. NOTE: If you are not replacing the wheel drive belt (AG), then proceed to Installation.

Installation

1.Position wheel drive belt (AG, Figure

5-6) into lower drive pulley (AH) clos- est to the engine.

2.Place the belt into the groove closest to the engine of the engine pulley (AE).

3.Position auger drive belt(s) (AD, Figure 5-6) down through gap. Position the belt(s) into the lower drive pulley (AO).

4.Position the auger drive belt(s) (AD, Figure 5-6) into engine pulley (AE).

5.Position belt guide (AC, Figure 5-6) back on engine and secure with two screws and washers removed earlier.

6.Reinstall bolt (BB, Figure 5-6), leaving 1/16" (1.5mm) clearance between un- derside of bolt head and front edge of pulley (AE). Tighten jam nut (BA) against engine crankcase.

7.If the wheel drive belt has been re- placed, then perform the wheel drive disc adjustment (see Wheel Drive Disc Adjustment ).

AUGER DRIVE BELT(S)

ADJUSTMENT

Due to wear, the auger drive belt(s) may begin to slip when the auger drive lever is engaged. To adjust the auger drive belt(s):

1.Perform the brake arm adjustment as described in this section. Leave the spark plug wire disconnected while per- forming this adjustment.

2.If assembling a new unit, raise the wheel drive control lever (AP, Figure

5-7) and the auger drive control lever (AL).

3.Pull the auger drive control arm (AJ, Figure 5-8) down completely.

4.Measure and note distance between coiled ends of spring (AK, Figure 5-8).

5.Squeeze auger drive control lever (AL, Figure 5-7) against handlebar. Measure between the coiled ends of the stretched spring (AK, Figure 5-8), mak- ing sure you measure between the same coils used in step 4.

18