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 407 of 894
TRUCK SERVICE MANUAL
ENGINE
3. Coat inside diameter of flange with Grade A (280 grit)
lapping compound and lap by turning flange one-fourth
(1/4) to one-half (1/2) turn each way, until both crank
nose and flange inside diameter are mated.
4. Clean all compound from flange and crankshaft nose;
allow no compound to reach seal or enter engine.
Contact Check
1. Apply a light even coat of Prussian Blue on nose of
crankshaft.
Hold
flange
or
pulley
perpendicular
to
centerline of crankshaft and position on nose, turn flange
one-eighth (1/8) turn and pull straight off.
2. Contact area should be 100% for a distance of 1/2
inch [12.70 mm] at large diameter of crank nose,
remainder of taper must have 70% to 100% of bluing
contact.
3. Clean all Prussian Blue from the crank nose and
flange.
INSTALLATION
CAUTION
Lubricate crankshaft nose in flange area with SAE 30
rust preservative lubricant with 2 percent or higher
sulfated ash content DO NOT use lubricant when cast
iron flanges 115562, 115563, 175183 or 175185 are
used.
1. Install crankshaft flange over end of crankshaft. Center
line of key-way in flange and key-way in crankshaft
should be aligned within plus or minus 1/8 inch [3.18 mm]
.
2. Install retainer and capscrew, check current Parts
Catalog for correct capscrew and retainer, torque to
specifications listed in Table 14-1
3. With dial gauge mounted to gear case cover, check
crankshaft flange eccentricity and wobble. Eccentricity
must not exceed 0.004 inch [0.10 mm] total indicator
reading; wobble must not exceed 0.003 inch [0.08 mm]
measured at 2-3/4 inch [69.85 mm] radius. Fig. 14-20.
4. Install vibration damper to crankshaft flange with
lockplates and capscrews. Torque to 60 ft-lb. [8.3 kg m]
and lock in place.
5. Position a dial gauge to gear case cover and rest arm
on outer machined surface at point (A, Fig. 14-21) to
check eccentricity and at point (B) on inner machined
surface of outer member to check wobble. Run-out must
not exceed 0.0025 inch [0.064 mm] per one (1) inch
radius of damper (as measured from center of damper).
Crankshaft must be kept at front or rear limit of thrust
clearance while wobble is being checked. See Vibration
Damper.
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