Hydraulic Brake Valve (cont). - TM-10-3930-638-24-P0346

TM 10-3930-638-24&P

2-43. SERVICE BRAKE MAINTENANCE (cont)

c. Hydraulic Brake Valve (cont)

(2) Power Assist Unit (cont).

REMARKS

ITEM

ACTION

LOCATION

STEP

REASSEMBLY/REPAIR

(cont)

If used, slide over narrow end of poppet

Install

d. Shim(s) (18)

onto shoulder

(cont)

e. Spring (17)

Install

On poppet (19)

f. O-ring (16)

Install

Over threaded end of plug (15)

g. End plug (15)

Install and tighten Push over spring (17) and turn clockwise

until securely mounted to body (5)

In vise, with gland end facing up

Reposition and

h. Body (5)

clamp

i. Spring (14) and

Install

In body bore

retainer (13)

j. Piston ring (12)

Install on piston

Use piston ring pliers

(10)

k. Spool (9)

Lubricate

Lightly coat piston end of spool with

hydraulic oil

l. Piston (10)

Install as shown

m. Piston (10) and

Lubricate

Lightly coat outer surface with hydraulic

oil

piston ring (12)

n. Spool cap (11),

Position spool cap (11) into bore of body;

Install

spool (9) and

then lower spool, cap and piston assembly

piston (10)

onto spring (14)

o. O-ring (20) and

Lubricate

Lightly coat with hydraulic oil

U-cup seals (22

and 30)

CAUTION

Exercise care so as not to damage U-cup seals (22 and 30) when

installing gland (2).

2-308