John Deere stx38 - Manual (Page 280)

6 - 48
3/21/97
REPAIR HYDROSTATIC POWER TRAIN
TRANSAXLE BLEED PROCEDURE
NOTE: This procedure is used before the transaxle is
installed. If the transaxle is already installed
see Standard Transaxle Bleed Procedure this
page.
1. Turn transaxle over.
2. Remove recess plug (A) from bleed port stack.
3. While you pour new oil into hole, have a helper hold
transaxle off bench and turn brake disc to rotate
motor shaft and bleed internal pump, motor, and
center block assembly.
4. Stop pouring oil when oil reaches bottom of hole.
Apply John Deere Pipe Sealant with Teflon® or
Teflon® tape to pipe plug. DO NOT allow any tape
to enter internal portion of bleed port stack.
Tighten plug to specification.
Specification:
Bleed port plug. . . . . . . . . . . . . . . . . 8 N•m (72 lb-in.)
Standard Transaxle Bleed Procedure
1. Safely raise and block rear wheels a minimum of 51
mm (2 in.) off the surface.
2. Run engine at slow idle.
3. Carefully engage and disengage transport (free-
wheel) lever while helper pushes shift lever into
forward, neutral, and reverse. Repeat several
times.
4. When drive wheels start to turn, shift to neutral and
be sure transport lever is disengaged.
5. Safely lower tractor to surface.
6. Sit in seat, shift into forward, and, if necessary,
have helper push tractor until transaxle drives
tractor under its own power.
7. Move throttle lever to fast idle and alternate shift
lever between forward and reverse several times
until transaxle is responsive and obtains full
forward speed of 8 km/hr (5 mph) and reverse
speed of 4.2 km/hr (2.6 mph).
8. Recheck and top-off oil level.
IMPORTANT: To test and adjust entire traction
drive system see Tests and Adjustments earlier
in this section.
M58210
A