a. Removal
TM 9-2320-280-20-2
7-18. PROPORTIONING VALVE REPLACEMENT
This task covers:
a. Removal
b. Installation
INITIAL SETUP:
Tools
Manual References
General mechanic’s tool kit:
TM 9-2320-280-10
automotive (Appendix B, Item 1)
TM 9-2320-280-24P
Materials/Parts
Equipment Condition
Cotter pin (Appendix G, Item 20)
Battery ground cable disconnected (para. 4-73).
Spring washer (Appendix G, Item 236)
Hood raised and secured (TM 9-2320-280-10).
Pushnut (Appendix G, Item 170)
Two bushings (Appendix G, Item 7)
Lubricating oil (Appendix C, Item 33)
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.
N O TE
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).
b. Installation
1. Install roportioning 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).
7-44
