BRADEN CH400B Installation Maintenance And Service Manual page 32

machined into the hex end cap serves as a visual indicator
that the valve contains the new spring seat. The spring
seat improvement may be added to early brake valves by
installing kit (Part No. 62805). Items 3, 7, 13, 14, and 22
shown above are included in the kit. We recommend that
this kit be installed whenever the brake valve is removed
for inspection or service.
It is always a good practice to check the initial opening or
cracking pressure of the brake valve whenever the hoist is
serviced or inspected. Refer to BRADEN Service Bulletin
number 527 for complete brake valve test and adjustment
procedures.
DISASSEMBLY
1. On the 1-1/4-inch valve only, remove pilot orifice from
the brake release port using a 5/32-inch Allen wrench.
1-1/4-inch valve
1-1/2-inch valve
2. Remove the fitting, motor drain check ball and spring.
1-1/4-inch valve
1-1/2-inch valve
3. Remove the spool spring retainer and spool spring. Re-
move the spool plug and carefully remove the spool
assembly. Remove the damper piston from the spool.
The piston will come out of the spool slowly, because
of a partial vacuum formed between the two. Use ex-
treme care to avoid damaging the polished surfaces of
either piece.
1-1/4-inch valve
1-1/2-inch valve
4. Remove the check valve spring retainer, spring and
check valve poppet.
CLEAN AND INSPECT
1. Discard all O-rings and backup rings. Clean all parts
in solvent and blow dry. Inspect polished surfaces of
spool and damper piston for damage that may cause
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