TM-9-2320-361-20
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
OCTOBER 1991
TM-9-2320-361-20 - Page 601 of 1207
TM 9-2320-361-20
8-10.
HYDRAULIC MASTER CYLINDER REPLACEMENT
(Contd)
CAUTION
When disconnecting hydraulic lines and hoses, plug all openings to
prevent dirt from entering and causing internal parts damage.
Remove plugs prior to installation.
1. Remove screw-assembled lockwasher (6) from brace (2) and open access door (1).
2. Disconect line (4) from adapter (5).
3. Remove two screws (8) and shield (9) from air-hydraulic cylinder (7).
4. Remove two screws (10) from bracket (20) and master cylinder (2). Push bracket (20) away from
master cylinder (3).
5. Remove spring (14) from clevis pin (11) and bracket (13).
6. Remove cotter pin (15) from clevis pin (11). Discard cotter pin (15).
NOTE
Brake pedal must be supported in full extended position for ease
when installing master cylinder.
7. Scribe or measure position of jamnut (17).
8. Loosen jamnut (17) and remove clevis pin (11) and yoke (16) from brake pedal lever (12).
9. Remove pushrod (18) and boot (19) from master cylinder (3).
NOTE
Have drainage container ready to catch brake fluid.
10. Remove line (21) and two gaskets (22) from adapters (23) and (24). Discard gaskets (22).
11. Remove four screws (25), lockwashers (26), and master cylinder (3) from bracket (27). Discard
lockwashers (26).
12. Remove adapter (23) and adapter (5) from master cylinder (3).
c. Installation
NOTE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
All male pipe threads must be wrapped with antiseize tape before
installation.
Install adapter (23) and adapter (5) on master cylinder (3).
Install master cylinder (3) on bracket (27) with four new lockwshers (26) and screws (25).
Install boot (19) and pushrod (18) on master cylinder (3).
Install two new gaskets (22) and line (21) on adapters (23) and (24).
Install yoke (16) on pushrod (18) to measured distance or scribed mark, ensure yoke (16) forked end
alines with brake pedal lever (12).
Tighten jamnut (17) on pushrod (18).
Aline brake pedal lever (12) with yoke (16) holes and install with clevis pin (11) and new cotter pin (15).
Install spring (14) on clevis pin (11) and bracket (13).
Install bracket (20) on master cylinder (3) with two screws (10).
Install shield (9) on air-hydraulic cylinder (7) with two screws (8).
Fill master cylinder (3) 0.5 in. (12.7 mm) from top (LO 9-2320-209-12-1).
Connect line (4) on adapter (5).
Close and secure access door (1) on brace (2) with new screw-assembled lockwasher (6).
8-28
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