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TM 10-3930-643-34
BRAKE TROUBLESHOOTING AND MAINTENANCE.
8-12.
Treadle Valve (S/N 2000 and below). (Sheet 3 of 7)
DISASSEMBLY
12•
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
Remove and separate guide (10) and
push rod (11).
Remove valve guide (12).
Using a small flat tip screwdriver,
remove and discard seals (13 and 14)
from valve guide (12).
Remove and separate spring (15) and
valve (16) from body (17).
Discard
valve (16).
Separate cover (18) and body (33).
Remove and discard preformed packing
(19).
Remove items 20 thru 24 as an
assembly from body (33).
Remove spring (21), seals (22 and 23)
and preformed packing
(24) from
piston (20).
Discard seals (22 and
23) and preformed packing (24).
Using snap ring pliers, remove ring
(25) and shield (26).
Remove items 27 thru 32 as an
assembly from body (33).
Remove valve (27), spring (28), valve
guide (29) and items 30 thru 32 as an
assembly.
Discard valve (27).
Remove and discard seals (31 and 32)
from retainer (30).
Go to sheet 4
8-49
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