TM 5-3895-359-14&P
transmission can distort the crankshaft and cause a
NOTE:
crankshaft failure.
Remove the tool that was used to
rotate the crankshaft when taking the
Check the crankshaft distortion as follows:
dial indicator readings.
a. Rotate the crankshaft clockwise until the
e. If the reading on the gage exceeds .0045 ",
crankshaft
counterweights
at
the
rear
check the reduction gear, transmission or power
connecting rod journal are in the six o'clock
generator for improper installation and realign
position.
as necessary.
18. Affix a new gasket to the oil pan flange and install
b. Center punch a hole in the inside face of each
the oil pan.
counterweight cheek, one quarter of an inch
from the lower end of each counterweight, to
19. Use a chain hoist and sling attached to the lifting
support the gage.
bracket or eye bolts at each end of the engine and
remove the engine from the overhaul stand.
c. Install a gage (Starrett Co. No. 696 dial gage,
or equivalent) in the center punch holes in the
20. Install all of the accessories that were removed.
cheek of each counterweight as shown in Fig.
21. After the engine has been completely reassembled,
refer to the Lubricating Oil Specifications on Page 10-9-7
d. Set the dial indicator at zero, then rotate the
and refill the crankcase to the proper level on the
crankshaft approximately 90 in both directions.
dipstick.
Do not allow the gage to contact the connecting
rod caps or bolts. Note and record the dial
22. Close all of the drains and fill the cooling system.
indicator readings at the 3, 6 and 9 o'clock
crankshaft counterweight positions.
The
23. After replacing the main or connecting rod bearings
maximum allowable variation is .0045 " total
or installing a new or reground crankshaft, operate the
indicator reading.
engine as outlined in the run-in schedule (Page 10-9-2).
10-2-55