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 382 of 894
TRUCK SERVICE MANUAL
ENGINE
REPAIR (HEADER LEAKS)
Header leaks may occur where tubes protrude through
plate or where header is soldered into case.
Repair
damaged tubes by inserting a smaller outside diameter
tube inside damaged tube.
Cut and flare ends; then
solder securely.
Do not damage tubes or header
material with heat while soldering.
If more than 5% of
tubes are defective, discard element.
ASSEMBLY
1.
Lubricate new rubber "O" ring (3, Fig.
7-9), using
appropriate mandrel, place in groove at bottom of
housing (2).
Make sure ring is fully seated, not twisted
and is free of cuts or nicks.
2.
Push element (1) carefully into housing, aligning index
marks on housing and element,
3.
Press second "O" ring around top of element with
equal pressure around ring circumference.
4.
Place retainer ring (4) over rubber "O" rings.
5.
Assemble new gaskets, cooler, cover and support;
secure snugly with capscrews and lockwashers.
Tighten
capscrews to 30 to 35 ft-lbs [4.1 to 4.8 kg m] torque.
LUBRICATING OIL PUMP
Lubricating oil pumps used on 855
C.I.D.
Cummins
Engines are disassembled, assembled and inspected in
a like manner.
Care must be taken during disassembly
to mark or identify parts, such as pressure regulator
plunger, idler shaft, drive shaft, capscrews as to length,
size, location, etc., as removed to aid in reassembly.
Clean disassembled pump in an approved cleaning
solvent as described in Engine Disassembly, Group 0.
DISASSEMBLY AND INSPECTION
1.
Remove pump cover or filter head from pump body.
Tap lightly with a soft hammer to loosen from dowel.
2.
Remove idler gear, press drive shaft through driven
gear, remove shaft and gear or coupling (Scavenger
Pump).
Note:
Double lubricating oil pumps have a scavenger
pump body that must be removed after drive shaft is
pressed through driven gear.
After removing scavenger
body repeat Step 2.
3.
If piston cooling tube, on pumps so equipped, is
mutilated, drive or press out from inside body.
4.
Press idler shaft from body if worn beyond worn
replacement limits as listed in Table 7-5 (2).
5.
Remove pressure regulator cap, spring and plunger,
check plunger for freedom of movement in pump body.
6.
Remove by-pass valve from filter mounting head, if so
equipped, inspect disc, spring and seat for wear or
distortion.
7.
Remove damaged dowel pins with ST-1 134 Dowel
Puller.
8.
If drive shaft is worn beyond worn replacement limits
or gear is chipped or worn, press shaft from gear.
9.
Inspect all gears for worn or broken teeth, all parts for
pitting or cracks and body(s) for distorted threads.
10.
Check gasket mating surfaces for flatness, nicks or
burrs.
Replace all unserviceable parts.
11.
Inspect bushings in body(s), cover and idler gear(s),
if bushings
are
damaged
or
worn
larger
than
worn
replacement limits replace as follows:
a.
Remove bushings with ST-1 158 Bushing Mandrel.
b.
Press new bushings into gear(s), body or cover, as
required, with ST-1158 Mandrel.
Bushings must be flush
to 0.020 inch [0.51 mm] below surface of gear(s), body or
cover.
c.
Bore new bushings to specifications as listed in Table
7-5
(1) with appropriate boring machine.
ASSEMBLY
1.
If removed, press large end of idler shaft in gear
pocket side of pump body using deep end of ST-1157
Spacer Mandrel where applicable.
If mandrel is not
used, press idler shaft in to protrude as listed in Table 7-
5 (2).
2.
Press driven gear onto drive shaft with shallow end of
ST-1157 Mandrel.
If mandrel is not used, press gear
onto shaft so protrusion meets specifications, Table 7-5
(2).
3.
Lubricate drive shaft, position drive shaft and gear into
pump body.
Support drive shaft on a suitable arbor
press and press drive gear or coupling (Scavenger
Pump) on drive shaft.
Note:
Coupling protrusion or drive gear to body press fit
clearance should meet specifications in Table 7-5 (2).
4.
Lubricate idler shaft and place gear on shaft.
Note:
On double lubricating oil pumps, install scavenger
pump body, using new gasket, and press scavenger
driven gear onto drive shaft, leave 0.002 to 0.004 inch
[0.05 to 0.10 mm] clearance between gear surface and
bottom of gear pocket.
Repeat Step 4.
5.
If removed, (piston cooled engine pumps), press new
piston cooling oil tube into pump body with beveled edge
up.
Protrusion should be as listed in Table 7-5 (3).
6.
Install new dowels in pump body, if removed.
378
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