Section XX. CRANE ENGINE REAR COVER AND SEAL
4-68. Removal
a. Remove flywheel and flywheel housing (para 4-48).
b. Remove gear cover and seal as illustrated on figure 4-22.
Figure 4-22. Crane engine rear cover and seal, removal and installation.
(2) Hand tighten the mounting capscrews.
4-69. Cleaning and Inspection
(3) Shift the cover until the oil pan surface of
a. Clean with an approved cleaning solvent and
the cover is flush with the oil pan surface of the cylinder
dry thoroughly.
block.
b. Inspect cover for cracks, breaks or other
(4) Check the rear cover alignment. Mount
damage. Replace a defective cover. Always replace
the dial indicator on the crankshaft with the point of the
seal assembly.
indicator on the machine surface of the rear cover
trunnion.
Rotate the crankshaft and check the
4-70. Installation
alignment. Maintain runout within 0.005 inch.
a. Install the rear cover and seal, see figure 4-
(5) Tighten the mounting capscrews to
20/25 ft-lbs.
(1) Press the seal "open" side down into the
b. Install flywheel and flywheel housing (para 4-
cover until the rear of the seal is flush with the rear of the
cover. and seal, removal and installation.
Section XXI. CRANE ENGINE CONNECTING ROD AND PISTON ASSEMBLIES
c.
Scrape all carbon from top of cylinder liner
4-71. Removal and Disassembly
bore.
d. Refer to figure 4-23 and remove connecting
a.
Remove cylinder head (para 4-41).
rod bolt nuts. Remove cap and bearing shells.
b.
Remove oil pump assembly (para 4-54).
4-31
