Figure 3-44. Carrier engine crankshaft and main bearing, exploded view
3-74. Reassembly and Installation
Driving main bearing caps into position can dislodge
crankshaft and main bearings. Coat main bearing shells
lower bearing half.
thoroughly with an approved high pressure grease.
Install all pipe plugs and torque to 5 ft-lbs. Stake plugs
e Tighten main bearing capscrews as outlined
by making a 1,/'64 inch indentation at outside diameter of
threads with center punch.
(1) Tighten both capscrews on each cap
b Install main bearing caps so that numbers
alternately to 150-160 ft-lbs.
stamped on cap correspond with numbers stamped on
(2) Tighten both capscrews on each cap
block. Main bearing caps are not interchangeable.
alternately to 340-350 ft-lbs.
c Lubricate threads of capscrews, lockplates, and
(3) Loosen both capscrews to removal all
shoulders of capscrews head with clean lubrication oil.
Threads and lockplates must be completely covered with
(4) Tighten both capscrews on each cap
an oil film and must not be damaged in any manner.
alternately to 85-90 ft-lbs.
d Start each capscrew and set caps in position by
(5) Tighten both capscrews on each cap
alternately tightening capscrews.
alternately to 170-180 ft-lbs.
(6) Scribe each cap in line with corner hex of
each capscrew, then advance all capscrews 60 in 30
barring crankshaft toward front and rear Total gauge
reading should be 0.005 0.015 inch.