TM-9-2320-280-20-2
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; UNIT MAINTENANCE; VOLUME 2 OF 3
JANUARY 1996
TM-9-2320-280-20-2 - Page 757 of 951
7-18. PROPORTIONING VALVE REPLACEMENT
This task covers:
a. Removal
b. Installation
INITIAL SETUP:
Tools
General mechanic’s tool kit:
automotive (Appendix B, Item 1)
Materials/Parts
Locknut (Appendix G, Item 128)
Lubricating oil (Appendix C, Item 33)
Manual References
TM 9-2320-280-10
TM 9-2320-280-24P
Equipment Condition
• Battery ground cable disconnected (para. 4-73).
• Hood raised and secured (TM 9-2320-280-10).
CAUTION
• Prior to removal, tag brake lines for installation.
• Cover or plug all open lines and connections immediately after
disconnection to prevent contamination. Remove all plugs prior to
connection.
• Do not attempt to disassemble proportioning valve. Damage to
equipment will result.
NOTE
Have drainage container ready to catch brake fluid.
1.
Disconnect electrical connector (1) from proportioning valve (6).
2.
Disconnect two brake lines (5) from proportioning valve (6).
3.
Disconnect two brake lines (4) from proportioning valve (6).
4.
Remove locknut (2), washer (3), and proportioning valve (6) from hydro-boost (8) and
proportioning valve bracket (7). Discard locknut (2).
1.
Install proportioning valve (6) to proportioning valve bracket (7) and hydro-boost (8) with
washer (3) and locknut (2). Tighten locknut (2) to 22 lb-ft (30 N
•
m).
2.
Connect two brake lines (5) to proportioning valve (6).
3.
Connect two brake lines (4) to proportioning valve (6).
4.
Apply lubricating oil to pins (9) of proportioning valve (6).
5.
Connect electrical connector (1) to proportioning valve (6).
b. Installation
a. Removal
TM 9-2320-280-20-2
7-44
Change 3
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