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GB - 20
SERVICE POSITION
Put unit into service position for easy access
to underneath the deck.
1. Place unit on a flat, level surface.
2. Disconnect spark plug wire from spark
plug.
3. Remove fuel cap, place a piece of
plastic bag over the opening and tighten
cap securely.
4. Tip unit onto right side.
Make sure unit is secure and will not tip
over.
IMPORTANT: Remove plastic from fuel cap
after unit is upright and service is complete.
DRIVE BELT REPLACEMENT
(self-propelled models)
To remove drive belt:
1. Disconnect spark plug wire from spark
plug.
2. Remove transmission cover.
3. Disconnect idler return spring from idler
arm. See Figure 20.
4. Disconnect the wheel drive cable from
transmission mount, and then
disconnect drive cable spring from idler
arm.
5. Remove belt from transmission input
pulley and transmission idlers, and then
push the belt out through the belt
channel.
6. Put the unit in the service position. See
SERVICE POSITION on page 20.
7. Remove blade and blade adapter from
the crank shaft.
8. Remove the belt from the engine pulley,
and then pull the belt through the belt
channel. See Figure 21.
SERVICE AND ADJUSTMENTS
CAUTION: AVOID INJURY. Read
and understand the entire Safety
section before proceeding.
CAUTION: Avoid fuel spills. Follow
steps below to help prevent fuel
spills. If fuel leaks into air cleaner,
replace air cleaner. ALWAYS clean
up any spilled fuel.
Figure 20
1. Belt
2. Transmission
Input Pulley
3. Idler Return
Spring
4. Wheel drive
cable
5. Drive Cable
Spring
6. Idler Arm
6
1
3
4
5
2
Figure 21
1. Drive Belt
2. Engine Pulley
3. Belt Channel
1
3
2
Blade and Blade Adapter Shown
Removed for Clarity of Photograph