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Section 4 - ADJUSTMENTS & REPAIR
WARNING
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.
4.3.6. Replacement Of Bearing On Pulley End Of Hex
Shaft
To replace the bearing on the pulley end of the hex
shaft, proceed as follows:
1. Hold the hex shaft with an adjustable wrench
held next to the pulley.
2. Remove the 3/8” hex lock nut which is located at
the end of the hex shaft on the outside of the right
wheel bracket. See Figure 4.14.
3. Remove holder, O-ring and bearing.
4. Install new bearing.
5. Carefully install new O-ring over the outside of the
new bearing.
6. Install bearing holder and secure with screws.
7. Install 3/8” hex lock nut.
FIGURE 4.14
4.4 BELT SERVICE
On self-propelled mowers, the engine belt transmits
power from engine to drive disc. The drive disc powers
the poly-v belt, which engages the transmission that
powers the rear wheels. Should these belts become
worn, they could cause slippage which would impair
mower performance. The condition of the engine belt
and poly-v belt should be checked after every 25 hours
of mower operation.
4.4.1. Engine Drive Belt Replacement
(Stretch Type Belts)
1. Empty the fuel tank.
2. Note the belt routing in Figure 4.15. There is no
idler pulley on these models to disconnect. See Figure
4.15.
TOP VIEW OF STRETCH TYPE BELT ROUTING
FIGURE 4.15
BALL BEARING
“O” RING
3/8”
LOCK
NUT
BALL
BEARING
HOLDER
DRIVE DISC
DRIVE BELT
ENGINE DRIVE
PULLEY