15
Section 4 - REPAIR & ADJUSTMENTS
WARNING
Before attempting any adjustments or repairs, STOP
the engine, remove the spark plug wire from the
spark plug and secure wire away from plug.
4.3.5. Replacing Bearing In Driven Disc
If the driven disc bearing fails, remove the driven
disc assembly and replace bearing as follows:
1. Remove snap ring. See Figure 4.14.
FIGURE 4.14
2. Slide the hub assembly out of the bearing.
3. Remove the four screws.
4. Remove bearing and replace with new bearing.
5. Reassemble components in reverse order.
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
on the outside of the right wheel bracket. See Figure
4.15.
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 4.15
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
1. Empty the fuel tank.
2. Unhook the idler spring from the right rear wheel
bracket. See Figures 4.16.
FIGURE 4.16
SHIM
WASHER
SNAP
RING
THRUST
PLATE
BEARING
REMOVE FOUR
MACHINE SCREWS
DRIVEN DISC
PLATE
DRIVEN
DISC HUB
RUBBER
DISC
BALL BEARING
“O” RING
3/8”
LOCK NUT
BALL BEARING
HOLDER
RIGHT REAR
WHEEL BRACKET
IDLER
ARM
IDLER
SPRING
SLOT IN
DECK
DRIVE DISC
DRIVE BELT
ENGINE DRIVE PULLEY
TOP VIEW OF ENGINE BELT
ROUTING