19
5. Have another person carefully push down on the left
push arm until the holes in the ball joint mount line up
with the holes in the castor arm (Fig. 20). Immediately
slide a 4 x 4 in. block of wood between the top of the
push arm and the underside of the chassis.
Sudden release of the push arm could cause injury.
Make sure that the wooden block does not slip out.
Warning
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 in.),
and 2 locknuts (5/16 in.).
Replacing the Drive Belt
The blade drive belt, tensioned by the spring loaded idler, 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 (Fig. 21). Remove the cotter pin and
clevis pin securing the idler arm bracket to the idler
arm.
1
2
3
Figure 21
1.
Spring
2.
Idler arm
3.
Idler arm bracket
3. Remove the capscrews and nuts securing the gear box
plate to the deck channels (Fig. 22). Lift the gear box
plate and gear box off of the deck channels and lay it on
top of the deck.
1
2
Figure 22
1.
Gear box plate
2.
Capscrews and nuts
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 23.
Figure 23
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 (Fig. 21). 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 in. (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.
Summary of Contents for 30716
Page 23: ...23 Troubleshooting 85 To 110...
