John Deere stx38 User Manual
Page 249
3/21/97
6 - 17
HYDROSTATIC POWER TRAIN
TROUBLESHOOTING
Problem or
Symptom
Drive belt jumping off or
Lack of drive in one or both
directions
Loses power under load, belt
slips, or erratic drive
Jerky or aggressive engagement
Cannot get full forward speed
Cannot get full reverse speed
Returns to neutral during
operation or under load
Shifts hard
Noisy operation
Leaking lubricant
Brakes will not stop tractor
Park brake will not hold
Transaxle overheats
Transport mode pushes hard
Check or
Solution
Transaxle case and
mountings loose, worn,
or broken—replace
halves or mountings
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Fan loose or damaged—
tighten or replace
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Incorrect type or volume
of lubricant used—replace
with correct type and
volume
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Bleed procedure
overlooked or improperly
done—repeat procedure
correctly
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Wheels and axle keys, key
ways, or snap rings
worn—replace as
necessary
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Motor drive shaft or axle
seals worn or damaged—
replace seals
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Transaxle case halves cap
screws loose or
stripped—tighten or
replace screws
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Poor application of
transaxle case halves
sealant—replace sealant
properly
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Incorrect type sealant—
replace with proper
sealant
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Transport (free-wheeling)
valves and linkage out of
adjustment or damaged—
readjust or replace as
necessary
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Engine performance
problems—see Engine
Section
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