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 337 of 894
TRUCK SERVICE MANUAL
ENGINE
Water Passages
1.
Check all water passages to make sure they are open
and for eroded water holes which may prevent proper seating
of head gasket or grommet retainers,
2.
Water holes not eroded more than 1/16 inch [1.59 mm]
from edge of hole can be sleeved.
3.
Check for erosion within 1/32 to 3/32 inch [0.79 to 2.38
mm] from liner counterbore; if not too deep, block may be
resurfaced.
Block must clean up before removing a maximum
of 0.010 inch [0.25 mm] material.
PARTS REPLACEMENT AND REPAIR
After a thorough inspection of cylinder block, bushings and
main bearing caps, the decision must be made whether to
install a new or reconditioned block assembly, replace
bushings or caps and how much can be done to rebuild or
recondition the reusable parts.
Camshaft Bushing Replacement
Bushings may be removed and installed with ST-782 Bushing
Driver and ST-784 Mandrel or ST-1228 Camshaft Bushing
Driver Kit.
The bushing at No. 7 journal must be installed so it
is away from rear face of block so oil can drain from hole at
end of camshaft to prevent hydraulic lock.
Main Bearing Cap Replacement
1.
Replacement main bearing caps have 0.015 inch [0.38
mm] material in bore.
Other dimensions are the same as
finished main bearing caps.
No. 7 replacement cap does not
have cap-to-block dowel holes and must be machined to block
width.
2.
Main bearing caps provide 0.0015 to 0.0045 inch [0.04
to 0.11 mm] interference fit in block.
3.
If the cap is a rear cap (No. 7):
a.
Remove locating dowels from block.
Locate cap so
thrust faces of cap and block are flush.
Use Prussian Blue on
block surface to locate dowel holes in cap.
b.
Remove cap, drill dowel holes.
Reinstall cap and
ream dowel holes to the smallest permissible oversize.
Install
dowels in block.
4.
Install all caps on block and machine bore as
described in Service Tool Instructions, Page 347
Sleeve Eroded Water Holes
The cylinder block surfaces around the water holes must be
free of any erosion scratches or blemishes which are more
than 0.003 inch [0.08 mm] deep in the area 1/16 to 3/32 inch
[1.59 to 2.38 mm] from edge of water holes.
Use ST-1010
Water Hole Counterboring tool to enlarge hole for sleeve.
See
Service Tool Instructions, Page 343
1.
To install water passage sleeve Part No.
191079:
a.
Slide sleeve onto stop end of ST-1010-9 Bushing
Driver.
b.
A sealant may be used to coat sleeve before
installation, if desired.
c.
Align sleeve in top of water passage hole and drive
sleeve in with a hammer until it bottoms.
Sleeve will protrude
above surface of block.
2.
If block is to be resurfaced, see "Top Surface
Refinishing." If not to be resurfaced, file bushing flush with top
of block, using a wide, flat mill file.
Top Surface Refinishing
If necessary, a cylinder block may be salvaged by removing a
maximum of 0.010 inch [0.25 mm] of material from the top
surface.
1.
Use either a milling machine or large surface grinder;
locate block on main bearing pads.
2.
Remove dowels from head mounting surface and
make light cuts of 0.001 to 0.003 inch [0.03 to 0.08 mm] deep,
removing only enough material to make block usable.
3.
Check distance from centerline of main bearing bore
(1, Fig.
1-2) to top of block.
See Table 1-1 (4).
Fig.
1-2 (N10181) Cylinder block height check location.
333
Back to Top
