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1.
Park the machine on a level surface, disengage
the blade-control switch (PTO), and engage the
parking brake.
2.
Shut off the engine, remove the key, and wait
for all moving parts to stop before leaving the
operating position.
3.
Using an air compressor, blow out any debris
from under the brake pole and around the brake
spacers
(Figure
77).
Figure 77
4.
Check the condition of the wire-harness leads,
connectors, and terminals.
Note:
Clean or repair as necessary.
5.
Verify that 12 V is present at the clutch connector
when the blade-control switch (PTO) switch is
engaged.
6.
Measure the gap between the rotor and
armature. If the gap is greater than 1 mm (0.04
inch), do the following steps:
A.
Loosen both brake-mounting bolts 1/2 to 1
full turn as shown in
Note:
Do not remove the brake pole from
the field shell/armature. The brake pole
has worn to match the armature and needs
to continue to match after you remove the
shim to ensure proper brake torque.
Figure 78
1. Brake-mounting bolt
g010868
Figure
78.
g010870
B.
Using needle-nose pliers, or by hand, hold
the tab and remove the shim
Note:
Do not discard the shim until the
clutch is functioning properly.
1. Shim
C.
Using a pneumatic line, blow out any debris
from under the brake pole and around the
brake spacers.
D.
Torque each bolt (M6 x 1) to 12.3 to 13.7
N∙m (9.5 to 10.5 ft-lb).
E.
Using a 0.25 mm (0.01 inch) thick feeler
gauge, verify that a gap is present between
the rotor and the armature face on both
sides of the brake pole as shown in
80
and
Figure
Note:
Due to the way the rotor and the
armature faces wear (peaks and valleys) it
is sometimes difficult to measure the gap
accurately.
1. Feeler gauge
59
(Figure
Figure 79
81.
Figure 80
79).
g010871
Figure
g010872
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