John Deere stx38 - Manual (Page 256)

6 - 24
3/21/97
TESTS AND ADJUSTMENTS HYDROSTATIC POWER TRAIN
SHIFT LINKAGE ADJUSTMENT
1. Safely raise rear of tractor off the surface and block
the front wheels. Remove rear wheels to gain
access to transaxle shift linkage and to safely
check for creep in transaxle (axles turning while
shift linkage is in neutral position without brake
engaged).
2. Check that all shift linkage hardware is in good
condition and tight. Replace components as
necessary.
3. With park brake unlocked, cycle shift lever (A) into
full forward and step on brake pedal to return shift
lever into neutral position (B). DO NOT move shift
lever by hand.
4. Run engine at fast idle and check that transaxle
does not creep while shift lever is in this position.
5. If transaxle creeps, loosen front and rear jam nuts
(C) of turnbuckle assembly (D).
6. Use flats (E) to turn threaded link (use 1/4 turn
increments) clockwise to shorten turnbuckle length
or counterclockwise to extend turnbuckle length.
7. Adjust turnbuckle length until creep stops. Hold flats
(E) stationary and tighten jam nuts (C).
8. Only as a last resort, if prior adjustment fails to stop
creep motion with few threads of link left, would
you adjust shift quadrant forward or rearward.
9. Loosen shift quadrant three mounting brackets (F).
10. With engine at fast idle, move quadrant forward or
rearward until creep motion stops with shift lever in
return-to-neutral position (via brake pedal).
11. Holding quadrant in place, turn engine off and
tighten three mounting brackets (F).
12. With engine running at fast idle, re-cycle shift lever
and return-to-neutral linkage several times to
ensure adjustment eliminates creep.
BELLCRANK SPRING TENSION
ADJUSTMENT
1. Make sure bellcrank assembly and transaxle right,
front mounting bracket are oriented properly. Slot
(C) should be aligned with transaxle housing rib
(A) so that ear (D) of lower anchor washer is not
wedged behind housing vertical rib (B).
A
B
M55850
M58259
C
E
D
M58277 F
M58355
D
C
B
A
M58367
D
B