Simplicity 1691682 Service & Repair Manual page 198

7 Transmission Repair
7D Sauer-Sundstrand BDU-10L-258
11. Install the thrust washer and pump cylinder block
spring onto the pump shaft.
12. Install the springs piston washers and pistons into the
cylinder block. The pistons must move freely in their
bores.
NOTE: To simplify the installation of both the motor block
and the pump block kits, wrap a rubber band snugly
around the pistons. This is intended to hold the pistons in
their bores as the block kits are handled during installa-
tion.
13. With the swashplate in the "neutral" (0 angle) position
and the transmission housing laying on its side,
install the pump cylinder block kit onto the pump shaft
in the housing.
14. Install the motor thrust bearing into the housing.
NOTE: It will be necessary to have a DRY journal bear-
ing to prevent a hydraulic lock while installing the motor
shaft
15. Install the motor shaft/cylinder block kit. Use caution
to prevent damage to the journal bearing while guid-
ing the shaft into position. Once installed, it will be
necessary to hold the assembly in position until the
center section has been installed.
16. Check to see that the piston springs are centered in
the cylinder block bores. If necessary, position them
with a small screwdriver. Use caution to avoid dam-
age to the cylinder block face.
17. Install the filter spring, washer and new filter element.
18. Install the two aligning pins, and install a new gasket
onto the housing.
19. Lubricate the running surfaces of the cylinder
blocks and the center section.
20. Position the housing with the housing opening UP,
and install the center section onto the housing while
holding the motor shaft in position in the housing jour-
nal bearing.
CAUTION: Make sure all parts are properly aligned.
Do not use excessive force.
21. Install the eight bolts and torque evenly to 18-21
ft.lbs..
22. Rotate the shafts a minimum of two turns to assure
correct assembly. When properly assembled the
shafts should require minimal torque to turn.
(Approximate 15 in. Ibs. - maximum)
Refer to the Minor Repairs section to complete reassem-
bly of the BDU transmission.
Figure D-17. Swashplate Changes
Figure D-18. Swashplate Components
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