TM 5-3895-376-14&P
6-5. CRANKSHAFT, GEAR, AND MAIN BEARING MAINTENANCE INSTRUCTlONS
This task includes:
a. Repair
INITIAL SETUP
Tools
Materials/Parts
Tool Kit, General Mechanic's
Solvent, Dry Cleaning; item 9, Appx E
Hot Plate, Electric; item 2, Appx F
Fuel Oil, Diesel; item 3, Appx E
Press, Arbor (Puller Kit and Press Frame); item 21,
Abrasive Cloth, Crocus; item 1, Appx E
Equipment Condition
Puller Kit, Universal; item 36, Appx F
Crankshaft removed.
Press, Rod, 54mm O.D.; item 24, Appx F
Press, Rod, 78mm O.D.; item 54, Appx F
General Safety Instructions
Press, Sleeve, 36mm I.D.; item 34, Appx F
Observe all WARNINGS and CAUTIONS
Press, Sleeve, 30mm O.D.; item 35, Appx F
Plier, Snap Ring; item 20, Appx F
1.
Repair of the crankshaft consists of the replace-
ment of the rear main bearing (3) and the crank-
shaft gear (5).
2.
Replace the rear main bearing (3) as follows:
a.
Using snap ring plier, remove the retaining
ring (1) from the seal housing (2).
b.
Using arbor press and a 54 mm diameter
pressing rod press the outer race of rear
main bearing (3) from the seal housing (2).
c.
Using bearing separator from puller kit, pull
the inner race of rear main bearing (3) from
the crankshaft (4).
e.
Using arbor press and 78 mm diameter press-
WARNING
ing rod press the outer race of bearing (3)
into seal housing (2), seating fully against the
P-D-680, Type Ill, Is moderately toxic to
shoulder.
the skin, eyes and respiratory tract;
avoid prolonged exposure. Skin and
f.
Use snap ring plier to install retaining ring (1)
eye protection is required. Good ventila-
in groove of seal housing (2).
tion is required. Do not use near open
flame or excessive heat. Flash point is
g.
Heat inner race of bearing (3) on a hot plate,
200 F (93.3' C).
or equivalent, to a temperature of 195 -
21F (90 - 100C).
d.
Clean crankshaft (4) in dry cleaning solvent
and dry thoroughly.
6-5
