Snapper MP216518B, MRP216518B, MR216518B, MRP216518B important safety instructions Pulley Position

Section 4 - REPAIR & ADJUSTMENTS

WARNING

PULLEY POSITION

DO NOT attempt any maintenance, adjustments or service with engine and blade running. STOP engine and blade. Disconnect spark plug wire and secure away from spark plug. Engine and components are HOT. Avoid serious burns, allow sufficient time for all components to cool.

4.4.1.Engine Drive Belt Replacement (Stretch Type Belts)

(Continued From Previous Page)

IMPORTANT: Drain fuel tank before tipping mower. DO NOT tip machine with carburetor or spark plug down. Oil from crankcase will saturate the air filter and cause the engine to be hard to start or not start at all. If contamination does occur, the air filter will have to be

SLOT IN END

OF DRIVE DISC

BOLT

DECK BRACKET (PARTIALLY SHOWN)

DRIVE DISC

BUSHING

BOLT RETAINER

LOCK WASHER

replaced.

3.Remove the driven disc. Refer to Section “Replacing Rubber Driven Disc” for driven disc assembly removal procedure.

4.Tilt mower up on its rear wheels and remove blade and blade hub. Assistance from another person may be necessary to hold mower in the tilted position.

5.Hold the slotted end of the drive disc bolt with a screwdriver and remove the nut and internal tooth lock washer. See Figure 4.16.

6.Remove the belt cover located under deck.

7.Lift the drive disc up and remove worn belt.

8.Loop one end of new belt over engine pulley and

insert the other end through slot in deck. See Figure 4.15.

9. Loop the belt around the pulley on the bottom of

the drive disc.

10. Reinstall drive disc and retaining hardware.

NUT

FIGURE 4.16

4.4.2.Transmission Poly-V Belt Replacement 1. Remove the driven disc. Refer to Section ”Re4placing Rubber Driven Disc“ for procedure.

2. Note the routing of the old belt around the three pulleys before removing it. See Figure 4.17.

3. Place new Poly-V Belt over end of hex shaft and onto driven pulley.

4. Work belt onto top of idler pulley.

5. Twist belt sideways and pull it upward between the differential bracket and drive pulley and then down into the pulley groove. Make sure the Poly-V Belt is above belt guide. See Figure 4.17.

6. Adjust clutch cable. Refer to Section “Wheel Drive Control Adjustment:”.

IMPORTANT: 1) The square shoulder of the drive

disc bolt must fit into the square hole of the bushing.

2) The square end of bushing must fit into the

DRIVE

IDLER

PULLEY DIFFERENTIAL BRACKET

bracket slot.
11.	Reinstall belt cover and tighten bolts securely.
12.	Reinstall	blade hub and cutter blade.
Recommended torque for blade cap screw is 40 ft. lbs.

PULLEYPOLY-V BELT

HEX SHAFT

BELT GUIDE	DRIVEN
	PULLEY

ROUTING OF POLY-V BELT

FIGURE 4.17

20