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 389 of 894
TRUCK SERVICE MANUAL
ENGINE
Fig.
9-1, (N10903).
Fuel pump or compressor drive
2.
Do not spin bearings before cleaning.
Do not spin by
force of air.
Hold both races while drying with clean,
compressed air.
The following defects cause bearings to
be rejected for further use:
a.
Broken or cracked race.
b.
Dented shields or seals.
c.
Cracked or broken separators.
d.
Flaked areas on balls, rollers or raceways.
e.
Broken or cracked balls or rollers.
f.
Bearings that have been overheated.
These bearings
are generally darkened to a brownish-blue or blue-black
color.
g.
Bearings whose raceways are indented or "brinelled"
by impressing balls or rollers into the races.
Oil Seals
Effectiveness of the seal depends on surface where seal
seats.
Always check hub sleeve surface for wear and
replace sleeve if necessary before installing new seal.
Immediately before
installing
seals,
always
lubricate
with
clean lubricating oil.
Bores In Housing
Bearings or bushings must not turn in housing retaining
bore.
If old bearing has turned and ruined housing, the
housing must be scrapped.
Bore of housing must be
clean before pressing bearing in place.
Thrust Washers
In installation of thrust washers on accessory drives,
thrust side of washers is installed away from housing.
Thrust side is identified by grooves.
Steel backing
against the cast iron housing will reduce the possibility of
thrust washers’ turning.
Improper installation of these
washers will result in excessive wear and increased end
play, which causes early failure of accessory drive
assembly.
Fuel Pump Or Compressor Drive
DISASSEMBLY AND INSPECTION
1.
Remove drive shaft locknut (9, Fig.
9-1), using ST-
850 or ST-1249 Coupling puller, pull coupling (10) from
shaft (7).
Press shaft and gear assembly from housing (5), press
shaft (7) from gear (2), and remove keys (11) from shaft
(7).
Note:
A splined coupling is used on air compressor
drive.
A buffer type coupling is used on fuel pump and
magneto drive.
2.
Inspect bushing in drive housing.
Replace if worn
beyond specifications as shown in Table 9-1(4).
Replace
thrust washers if worn or damaged.
385
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