TM 5-4320-300-14
6-9. VALVES, CAMSHAFT, AND TIMING GEARS (CONT)
Location/Item
Action
Remarks
21. Cam lobes
Measure slight cam lobe wear
with a tapered leaf set of feeler
gages, 0.0015 to 0.0100 inch
(0.0381 to 0.254 mm). Slide
feeler gage leaves between the
flat on injector rise side of cam
lobes and a piece of square bar
stock, 1/8 x 3/8 x 1 inch
(3.175 x 9.525 x 25.4 mm). If
flats measure less than 0.003
inch (0.0762 mm) in depth,
camshaft is satisfactory for
further service. Smooth over a
slightly worn lobe with a fine
stone and P-C-458 crocus cloth prior to
installation.
CLEANING OF
TIMING GEARS
WARNING
Severe burns, illness, or death may result if personnel fail to handle diesel
fuel properly. Observe the following precautions:
·
Do not inhale vapor.
·
Do not handle fuel near open flame, sparks, or excessive heat.
·
Be certain fuel lines and connections are secure.
·
Work in a well-ventilated area.
Compressed air used for cleaning shall not exceed 100 psi (690 kPa). Use
goggles or face shield for eye protection. Do not direct airstream against skin.
22. Timing gears
Wash camshaft, balance shaft, crankshaft, and
idler gears with clean VV-F-800 diesel fuel and
dry with compressed air.
INSPECTION OF
TIMING GEARS
23. Timing gears
Examine all gear teeth for scoring, pitting, or
wear. Replace any gears which are damaged
or worn, or which have missing teeth'
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