TM-9-2520-238-34

M113A1 FOV, M113A2 FOV, M548 AND M548A1

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL; RIGHT ANGLE DRIVE, COOLING FAN; GEARCASE, TRANSFER; DRIVE ASSEMBLY, FINAL; DIFFERENTIAL, STEERING CONTROL; BRAKE, SINGLE DISK; CYLINDER ASSEMBLY, HYDRAULIC BRAKE

TM-9-2520-238-34 - Page 285 of 319

TM 9-2520-238-34

REPAIR HYDRAULIC MASTER BRAKE CYLINDER — Continued

0031 00

ASSEMBLY

1.

Install new secondary cup (16) and secondary cup (15) on low pressure piston (11).

2.

Install low pressure piston (11), primary spring (13), spring retainer (12), secondary spring (14), and new gasket (9) in

housing (10).

3.

Install new primary cup (8) on high pressure piston (7).

4.

Push low pressure piston (11) forward 1 1/2 inches (3.8 cm) from pushrod end, using screwdriver or similar tool.

5.

Maintain spring pressure and insert piston into housing (10) until base of piston sits on gasket (9).

6.

Release spring pressure and, at the same time, apply sufﬁcient pressure to base of high pressure piston (7) to prevent

primary cup (8) from unseating.

0031 00-5