John Deere stx38 - Manual (Page 199)

3/21/97
5 - 35
POWER TRAIN TESTS AND ADJUSTMENTS
NOTE: These adjustment procedures can be
performed with tractor on the floor; however,
you may want to safely raise the tractor for
easier access. If you do, remove the battery to
avoid spilling any electrolyte solution.
2. Remove the mower deck.
3. Depress clutch/brake pedal (A) and lock lever (B)
into PARK position from operator’s station.
4. Measure distance between end of compression
spring bracket (C) and front edge of brake rod stop
tabs (D):
If distance is less than 2 mm (0.08 in.)—
5. Unlock park brake, release pedal, and gradually
tighten lock nut (E) until freeplay in brake arm
assembly is removed.
6. Depress pedal and lock park brake.
7. Remeasure distance between end of compression
spring bracket (C) and front edge of brake rod stop
tabs (D), it should read 7.5—8 mm (0.30—0.32
in.).
8. Once above measurement is obtained, recycle
clutch/brake pedal again.
9. Remeasure distance, it should be the same. This
brake setting should hold the tractor stationary on
a 17° slope.
If distance is greater than 8 mm (0.32 in.)—
10. With park brake set, gradually loosen lock nut (E)
until distance of 7.5—8 mm (0.30—0.32 in.) is
obtained.
11. Recycle park brake a few times and remeasure
distance each time (see Step 7).
BRAKE PAD ADJUSTMENT
1. Check brake linkage, pads and rotor for wear,
binding and dirt.
2. Insert feeler gauge between rotor and outside brake
pad. Clearance between friction pucks (brake
pads) and disc (rotor) should be 0.254 mm
(0.010 in.).
3. Adjust nut (A) to get specified clearance.
4. Brakes should hold on a 17° slope and not drag
when tractor is level and in neutral.
Specifications:
Brake Pad Clearance
. . . . . . . . . . . . . . . . . . . . . . . . 0.254 mm (0.010 in.)
B
C
D
A
M42579
M42596
C
D
E
M42536
M56073
A