John Deere stx38 User Manual
Page 226
5 - 62
3/20/97
REPAIR
POWER TRAIN
• inside bearing (I) and outside (K), which are press
fit, should not be scored nor discolored (burnt)
• gear bore (J) should not be scored or discolored
(burnt). Replacement gear has bronze sleeve
bearings (2), a new shaft is also recommended
whenever a new gear is ordered
5. Inspect lower and upper case halves idler shaft
bearing surfaces (L) for excessive scoring or wear.
Replace case halves as necessary.
Inspect Drive/Intermediate Shaft Assemblies:
1. Visually check overall condition of assemblies,
including gears for wear, pitting, broken teeth, etc.
2. For the drive shaft assembly (I), use a feeler gauge
to measure “go/no go” air gap (G) between side
surface of small gear (F) and side surface of shim
washer (H):
• “GO” air gap should be 0—0.20 mm (0—0.008 in.)
• “NO GO” air gap is anything greater.
3. For the intermediate shaft assembly (E), use a
feeler gauge to measure “go/no go” air gap (C)
between end surface of flange bearing (D) and
washer (B):
• “GO” air gap should be 0—0.25 mm (0—0.010 in.),
• “NO GO” air gap is anything greater.
4. If either or both measurements result in a “NO GO”
reading, shim washers (A and H) need to be
added or worn components need to be replaced.
NOTE: You may prefer to use a caliper to measure the
drive shaft gear stack. Remove bevel drive
gear only and reinstall rest of drive shaft
assembly. Put calliper over shim washer (B)
and lip of right-side flange bearing. Caliper
should read 61.6077—61.7855 mm (2.4255—
2.4325 in.).
Disassemble Drive/Intermediate Shaft Assemblies:
1. Lift both drive (I) and intermediate (E) shaft
assemblies out together.
2. Carefully remove drive shaft assembly components
(bottom row of exploded view) from drive shaft (I).
Be sure to remember each components
orientation to its neighbor and to the drive shaft.
You may want to mark the same side of each
component to help keep the orientation straight.
3. Clean components individually once disassembled.
4. Inspect each component closely for wear, scoring,
cracks, chips, and broken teeth or splines.
5. Do the same for the intermediate shaft (E) and its
components (top two rows of exploded view).
6. Replace components as necessary.
IMPORTANT: Remember gear sets are a matched
set and both must be replaced, even if only one
gear in the set is damaged. See depiction on
opposite page.
M42326
I
K
J
M42327
L
M42527
H
G
F
I
E
D
C
B
A
M42327
I
E