Crane Engine Camshaft Assembly Cleaning
Clean all parts with an approved cleaning
solvent and dry thoroughly.
Inspect the camshaft bearing journal for
diameter of 2.242 inch minimum to 2.243 inch
Inspect the cam lift clearance, the intake
should be 0.3395 inch, and the exhaust 0.352 inch.
Inspect the camshaft end play for clearance
of 0.005 inch minimum to 0.009 inch maximum.
Inspect the camshaft bushings for tolerance
Figure 205. Crane engine camshaft assembly,
of 2.2445 inch minimum and 2.2450 inch maximum.
removal and installation.
Inspect the bushing clearance for 0.0015 inch minimum
and 0.0030 inch maximum, with an allowable wear of
Crane Engine Camshaft Assembly Installation
Inspect the tappet hole for a diameter of
Install the camshaft assembly as illustrated
1.125 inch minimum to 1.126 inch maximum diameter.
Inspect the tappet hole clearance for 0.0006
inch minimum to 0.002 inch maximum.
Section XXII. CRANE ENGINE CRANKSHAFT ASSEMBLY
(3) Remove oil pan and filler blocks (para.
The crane engine crankshaft assembly is forged of
(4) Remove the oil pump (para. 851).
high carbon steel an d is carried on seven large main
(5) Remove the connecting rod caps (para.
bearings. Special attention must be paid to the end play
of the crankshaft as excessive play may cause damage
to the front main bearings. The crankshaft is drilled for
It is both statically and
(7) Remove the crankshaft assembly as
dynamically balanced. The front end of the shaft is
machined to extend through the oil seal in the front
Disassembly. Disassemble the crane engine
cover, to accommodate the fan drive pulley.
crankshaft assembly in numerical sequence as
Crane Engine Crankshaft Assembly Removal
Crane Engine Crankshaft Assembly Cleaning,
Inspection, and Repair
(1) Remove the front mount and pulley
Cleaning. Clean all parts in an approved
cleaning solvent and dry thoroughly.
(2) Remove the flywheel and housing (para.