TM 1-1520-238-23
3-218
3.58.
PARKING BRAKE MASTER CYLINDER DISASSEMBLY/ASSEMBLY (AVIM) – continued
b. Assemble cylinder (3).
(1) Place poppet (19) in piston assembly (22).
(2) Place spring (18) in cap (16).
(3) Install cap (16) with spring (18) on piston as-
sembly (22).
(4) Measure piston assembly (22) length. Piston
must be exactly 3.53 INCHES long.
(5) Measure poppet (19) staging pressure. Stag-
ing pressure must be 65 to 71 POUNDS. Use
spring tester.
(6) Adjust length and pressure as required. One
turn of cap (16) equals 0.055 INCH which
equals approximately 22 POUNDS. Use
shims (17) under cap (16) to adjust length.
(7) Install new packing (21) on piston (20).
(8) Install piston (20) with packing (21) into piston
assembly (22) with rounded end facing pop-
pet (19).
(9) Install new packing (30) on head piston (29).
(10) Install head piston (29) and guide (28) on
spring (27).
(11) Install retainer (26) into spring (27) over pis-
ton assembly (22).
(12) Install new packing (31) on seat (25).
(13) Install clip (32) on piston (24).
GO TO NEXT PAGE
M04-2953-12
22
29
30
28
27
19
18
16
26
20
21
M04-2953-13
16
17
3.53 IN
24
M04-2953-14
22
31
32
23
25
