10-4. BRAKE CONTROL VALVE REPAIR (CONT)
Separate and disassemble control
housing (55) from charging
Remove two screws (57) and
lockwashers (58). Discard
Remove screw (59) and
lockwasher (60). Discard
Separate control housing (55) from
charging section (56).
Remove preformed packings (61 and
62) from charging section (56).
Discard preformed packings.
If damaged, remove two screws (63)
and label (64) from charger
b. Cleaning. See Cleaning Instructions
Measure spool (32) and balls (26
Assemble spool (32) inside insert (33).
Place balls (26 and 31) in respective
seats. Measure across balls (26 and 31)
with a micrometer. Record
Remove spool (32) and place balls (26
and 31) on their respective seats (25
and 30). Measure with a micrometer.
Subtract smaller dimension from larger dimension. If difference is less than 0.004 in.
(0.10 mm), replace spool (32).
Inspect plug and locking pin assembly (22).
The plug (22) has a nylon pin through threaded end so that plug will hold adjustment to
which it is set. Screw plug into control housing (55).
Check to see if nylon pin has sufficient friction with threads to keep plug (22) from vibrating
If there is no increase in torque required to turn plug (22) when pin engages threads, replace