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WARNING
Sudden release of the push arm could cause
injury.
Make sure that the wooden block does not
slip out.
6. Secure the ball joint mount and chain bracket to the
castor arm with the capscrews, flat washers, and flange
nuts. Position the flat washers to the outside of the
castor arm. Mount the chain bracket in the forward
set of holes.
7. Carefully remove the wood block holding the push
arm down.
8. Line up the holes in the yoke and input shaft of the
gear box. Slide the yoke onto the shaft and secure them
together with a roll pin, 2 capscrews (5/16 x 1-3/4
inches), and 2 locknuts (5/16 inches).
Replacing the Drive Belt
The blade drive belt, tensioned by the spring loaded idler
pulley, is very durable. However, after many hours of use,
the belt will show signs of wear. Signs of a worn belt are:
squealing when belt is rotating, blades slipping when cutting
grass, frayed edges, burn marks and cracks. Replace the belt if
any of these conditions are evident.
1. Lower the cutting unit to the shop floor. Remove the
belt covers from the top of the cutting unit and set the
covers aside.
2. Unhook the spring from the idler arm bracket to
release the belt tension (Figure 22). Remove the cotter
pin and clevis pin securing the idler arm bracket to the
idler arm.
Figure 22
1. Spring
2. Idler arm
3. Idler arm bracket
3. Remove the capscrews and nuts securing the gear box
plate to the deck channels (Figure 23). Lift the gear
box plate and gear box off of the deck channels and
lay it on top of the deck.
1. Gear box plate
4. Remove the old belt from around the spindle pulleys
and through the idler pulley assembly.
5. Route the new belt around the spindle pulleys and
through the idler pulley assembly as shown in Figure
24.
1. Belt routing
6. Reposition the gear box plate on the deck channels
while routing the belt around the gear box pulley.
Mount the gear box plate to the deck channels with the
capscrews and nuts previously removed.
7. Install the idler arm bracket to the idler arm with the
cotter pin and clevis pin (Figure 22). Hook the spring
onto the idler arm bracket. To ensure that there is
proper tension on the drive belt, the spring should be
extended to a length of approximately 7 inches (18 cm).
If the spring is not extended to this length, relocate the
spring rod to a new mounting hole further away from
the belt.
8. Install the belt covers.
19
Figure 23
2. Capscrews and nuts
Figure 24
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