MINOR REPAIR
Minor Repairs may be performed, following the proce-
dures in this section, without voiding the unit warranty.
Cleanliness is a primary means of assuring satisfactory
transmission life, on either new or repaired units.
Cleaning parts by using a clean solvent wash and air
drying is usually adequate. As with any precision equip-
ment, all parts must be kept free of foreign materials and
chemicals.
Protect all exposed sealing surfaces and open cavities
from damage and foreign material.
It is recommended that all O-rings be replaced. Lightly
lubricate all O-rings with clean petroleum jelly prior to
assembly.
Plug / Fitting Torques
If any plugs were removed from the housing, center sec-
tion, or end cap during servicing, they should be torqued
as indicated in the accompanying tables:
ITEM TORQUE
Housing Plugs/Drains 29 to 50 ft. lbs.
(3/4-16 or 7/8-14 O-Ring) (39 to 68 Nm)
Bypass Passage Plug 56 to 50 ft.lbs.
(1/16-27 Pipe) (6.4 to 16 Nm)
Loop Plugs 15 to 35 ft.lbs
(9/16-18 O-Ring) (20 to 47 Nm)
Inlet Fitting/Plug 8 to 20 ft.lbs.
(7/16-20 O-Ring) (11 to 27 Nm)
Figure D-3. Sauer-Sundstrand Hydrostatic Drive
Unit BDU-10-L
Figure D-4. Minor Repairs
7 - 49
7 Transmission Repair
7D Sauer-Sundstrand BDU-10L-258
Item Qty. Description
1.* 1 SPACER
2.* 1 SEAL
3.* 1 RETAINING RING
4.* 1 SEAL
5.* 1 SEAL
6.* 1 SEAL
7. 1 BYPASS VALVE KIT
8. 1 CAPSCREW, Socket Hd.
9.* 2 RETAINING RING
10. 1 BEARING. Shaft
11. 2 CRADLE, Bearing
12. 1 VARIABLE SWASHPLATE
13. 2 BLOCK ASSY.
14. 1 TRUNNION ARM
15. 1 GUIDE
16. 1 SPRING
17. 2 THRUST WASHER
Item Qty. Description
18. 2 PIN
19. 1 CHECK VALVE KIT, RH
20. 1 CHARGE RELIEF KIT
21. 1 CHECK VALVE KIT, LH
22 2 THRUST BEARING ASSY.
23.* 1 GASKET, Center Section
24. 1 PUMP SHAFT
25. 1 PUMP HOUSING KIT
26. 1 CENTER SECTION KIT
27. 1 MOTOR SHAFT
28.* 2 O-RING
29. 1 CHARGE PUMP KIT
30. 1 GEROTOR ASSY.
31. 2 CAPSCREW, 6M x 20
32. 2 SPACER PLATE
33. 3 DOWEL PIN
34. 1 CHARGE PUMP HOUSING
* Parts can be ordered as Overhaul Seal Kit.
Figure D-2. Hydro-Gear BDU10L-258 Hydrostatic Pump
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