John Deere stx38 - Manual (Page 267)

3/21/97
6 - 35
HYDROSTATIC POWER TRAIN REPAIR
1. First, measure air gap between edge of swashplate
slot (A) and shift blocks (D). If out-of-specification,
replace shift blocks.
2. Lift shifter shaft assembly (E) and shift blocks (D)
from upper case half mounting hole (B) and slot of
swashplate (A).
3. Inspect mating surfaces of case hole (B) and end of
shaft (H) for scoring or pitting. Replace as
necessary.
4. Remove and discard o-ring (G). Replace o-ring
every time shifter shaft is removed.
5. Inspect mating surfaces of shifter shaft ball joint (C)
and shift blocks (D) for scoring or pitting. Replace
as necessary.
6. Inspect shifter shaft keyway (E) for chips or wear.
Replace shifter shaft as necessary.
Inspect Differential Axle Assembly—
K-50 Version
K-55 Version
1. Visually inspect assembly:
• ring gear teeth (A) are all in good condition;
• sides of ring gear (B) are not contacting walls of
case half (C);
• thrust plates (D) are holding assembly in proper
alignment;
• axle shafts and bevel gear splines (E) instantly and
smoothly turn differential bevel gears;
• bevel gears (F) are all in good condition;
• K-55 axle shaft bushings (H) are both in good
condition;
• axle shafts (I) are both in good condition;
• area is free of metal chips or shavings.
M58215
A
B
E
F
G
H
C
D
M58219
A
B
C
D
C
F
E
H
A
B
C
D
E
C
F
H
M58369
I
I