TM-5-3805-254-14-P-2
TRUCK, DUMP, 20 TON, 6X4, ON-OFF HIGHWAY 71,000 GVW, IHC MODEL F-5070 (CCE)
TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, GENERAL SUPPORT AND DEPT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS INFORMATION AND SUPPLEMENTAL MAINTENANCE INSTRUCTIONS)
JUNE 1980
TM-5-3805-254-14-P-2 - Page 143 of 894
TRUCK SERVICE MANUAL
BRAKES-AIR
ASSEMBLY, ADJUST AND TEST
Prior to assembly, lubricate the lower body bore,
the top of the piston, the piston grooves, piston
grommets, a piston setting spring guide and adjust screw
using Item 1 in LUBRICANT SPECIFICATIONS.
Install the exhaust stem grommet in its groove in
the stem bore of the piston.
Drop the inlet and exhaust valve into place at the
bottom of the piston.
Install the inlet valve spring with its narrow end
against the valve.
Press the spring down until the large
coiled end snaps into the groove inside the piston.
Position the exhaust stem spring over the exhaust
stem.
Then carefully press the stem into the stem bore
of the piston.
Install the piston in the body.
Install one lower spring seat, spring guide, the
other lower spring seat, pressure setting spring and the
hex-shaped upper spring seat on the adjusting screw, in
that order.
Screw the upper spring seat down until the
dimension from the top of the seat to the bottom of the
stem head is approximately 17/8".
Install the lock nut.
Before placing the adjusting screw and stem
assembly in the governor body, check to be sure the
exhaust stem and its spring are in place in the piston.
Install the adjusting screw and spring assembly
retaining ring.
At this point make the adjustment as outlined
under SERVICE CHECKS.
After the adjustment is made, the top cover should
be screwed on tightly until it seals the body against the
entrance of any foreign matter.
If necessary, install new filters in the reservoir and
unloader ports.
These cup shaped filters can be
installed with head of a pencil.
Perform operating and leakage tests as outlined in
SERVICE CHECKS section when checking rebuilt
governor.
MAINTENANCE
15,000 Miles
Clean or replace governor filters.
If cleaning use a
cleaning solvent which is known to have no detrimental
effect on metal or rubber material.
100,000 Miles
Disassemble the governor and clean and inspect
all parts.
141
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