BRAKE CYLINDER VALVE STEERING DRIVE
7E - 85
DISASSEMBLY
REMARK
Callouts from exploded and cross section views correspond with
callouts in following steps.
1. Remove two end cover bolts (11) and washers (12) across from
each other. Install longer bolts in place. Remove remaining two
end cover bolts. Slowly loosen two longer bolts until all spring
tension is relieved. Remove end cover (8).
WARNING
Spring loaded assembly. Use extreme caution when disas-
sembling.
2. Remove seal retainer (10) from spool.
3. Remove spool wiper (1) and o-ring (17) from retainer (10) and
discard.
4. Remove return spring (9) and spool (3) from valve body.
REMARK
Check spring for damage and fatigue against those values listed
in SPECIFICATIONS.
5. Remove spool stop (5) and retainer washer (6) from spool.
6. Remove end plug (14) and o-ring (15) from valve body.
7. Remove metering spool (4) from valve housing.
8. Remove inner (15), outer (7) metering springs and spring guide
(16) from valve housing.
REMARK
Check spring for damage and fatigue against those values listed
in SPECIFICATIONS.
9. If not already done, discard all o-rings and seal and replace with
new. Clean all parts in solvent and dry thoroughly with com-
pressed air. Inspect valve body wall, and spool for wear, scoring,
scratches or grooves that may cause seal kit failure. Very slight
scratches can be polished out with a fine emery cloth and oil so
a smooth surface is presented to new seals. Inspect all parts for
cracks and breakage and replace as necessary.
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