TM 5-3805-280-24-2
Camshaft, Balancer Shafts and Timing Gear Train
MEASURE CAMSHAFT LOBE HEIGHT
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1. Measure each camshaft lobe at highest point (A) and
at narrowest point (B). The difference between these
dimensions is camshaft lobe height. If height is not
within specification on any lobe, install a new camshaft.
Camshaft Intake Lobes--Specification
Height .................................................. 7.05--7.31 mm (0.278--0.288 in.)
Camshaft Exhaust Lobe--Specification
Height .................................................. 6.89--7.15 mm (0.271--0.281 in.)
2. Measure fuel supply pump camshaft lobe diameter. If
diameter is not within specification or lobe surface is
grooved, install a new camshaft.
Fuel Supply Pump Camshaft Lobe--Specification
Diameter .............................................. 41.15--41.41 mm (1.62--1.63 in.)
A--High Point
B--Narrow Point
RG,16,DT7496 1914NOV971/1
REMOVE AND INSTALL CAMSHAFT GEAR
IMPORTANT: Camshaft must be replaced if dropped
or damaged, do not allow camshaft to
strike floor when removing gear.
1. Press camshaft out of gear.
2. Clean camshaft and gears in solvent. Dry with
compressed air.
3. Inspect cam journals for nicks and scratches. Replace
camshaft if damage is found.
Continued on next page
RG,16,DT7495 1914NOV971/2
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