Repair – John Deere stx38 User Manual

Page 275

3/21/97

6 - 43

HYDROSTATIC POWER TRAIN

REPAIR

4. Install motor drive shaft assembly with longer

cylinder block splines (G), spring (H), and snap
ring (F) through fixed swashplate hole as shown.

5. Coat motor (I) and pump (J) machined surfaces of

center block and backside of bronze motor (L) and
pump (K) plates with grease to hold bronze plates
in place.

6. Install motor (L) and pump (K) plates with bronze

side facing away from center block.

Install Pump, Motor, and Center Block Assembly—

1. Assemble motor cylinder block and drive shaft

assembly (C) to center block. DO NOT scratch
surface of bronze plate (M) with machined
surface of cylinder block or with end of drive
shaft (L).

2. Watch to see that end of pump shaft (J) is aligned

with bronze plate center hole (I) as you execute
Step 3.

3. At a slight angle, align seal (A), ball bearings (B),

and fixed swashplate body (N) (with thick portion
down) with upper case grooves and, at the same
time, align two center block rolled pins (K) with
case mounting holes as you squeeze center block
and motor assemblies together.

4. Once rolled pins (K) are started, install center two

cap screws (D) into rolled pin holes and turn finger
tight only.

5. Install spacer (G) and right (third) cap screw (D)

and turn finger tight.

6. Check assembly closely to ensure everything is

aligned properly then tighten three caps screws to
specification.

Specification:

Center block cap screws

. . . . . . . . . . . . . . . . . 44—58 N•m (391—520 lb-in.).

M58245

M58247

M58248