TM 5-2420-230-24-1
Table 3-1. Unit Level Preventive Maintenance Checks and Services (PMCS) for IHMEE. -- Continued
Item to be
Item
Checked or
Not Fully Mission
No.
Interval
Serviced
Procedure
Capable If:
18
Semiannual
Propeller Shafts and
NOTE
U-Joints
When using a grease gun, apply lubricant
to fitting until clean lubricant squeezes out
of part being lubricated.
Use proper lubricant to purge all four
bearing seals of each U-joint. This flushes
abrasive contaminants and ensures all four
bearings are filled properly. Pop seals.
These seals are made to be popped
(Para 3-8 and Para 14-5).
When sure of proper lubrication, run bolts
down until bearing plates are flush to yoke
races, then back off slightly. Tighten bolts
to 62 lbf/ft (84 Nm).
If any seals fail to purge, move driveshaft
from side to side while applying grease gun
pressure. This allows greater clearance on
thrust end of bearing that is not purging. If
seals still do not purge, rock vehicle by
releasing parking brake. This removes
windup in the driveline and allows for
greater clearance on the thrust end of the
U-joint.
Due to the U-joint seal's design, there will
occasionally be one or more bearing seals
of a joint that may not purge. Seal tension
then has to be released.
To release seal tension, loosen bolts
holding bearing assembly that does not
purge. It may be necessary to loosen
bearing assembly approximately 0.06 in.
(1.5 mm), minimum. If loosening does not
result in purging, remove bearing assembly
to determine cause of blockage.
When lubricating splines of propeller
shafts, apply grease to spline fitting until
lubricant appears at pressure relief hole.
Cover hole with finger and continue adding
grease until it appears at sleeve yoke seal.
a. Inspect all propeller shafts for bends and
Any evidence of bends or
cracks.
cracks.
b. Inspect U-joints for wear, play, and broken Broken or missing
or missing lubrication fittings. There
lubrication fittings. Free
should be no free play at U-joint.
play at U-joint.
3-14
