capacity in the item/system being
CLASS III Leakage of fluid great enough to form
checked/inspected. When in doubt,
drops that fall from the item being
notify your supervisor.
When operating with Class I or II leaks,
continue to check fluid levels as
required in your PMCS.
Class III leaks should be corrected
Equipment operation is allowable with
minor leakage (Class I or II). Of course,
consideration must be given to the fluid
Table 4-1. Organizational Preventive Maintenance Checks and Services
ITEM TO BE INSPECTED
PERFORM OPERATOR/CREW PMCS PRIOR TO
OR IN CONJUNCTION WITH ORGANIZATIONAL
a. Check for loose or missing mounting hardware.
b. Check electrical wiring for damage or loose connections.
FLYWHEEL AND AIR SHROUDS
Check the vanes on the flywheel for cracks or breaks. Check
the air shroud for loose mountings, bends, or cracks.
Inspect valve tappets for proper adjustment. With engine
cold the clearance should be, inlet 0.008 inch and exhaust
Remove the end cover and inspect for cracks and corroded
terminals. Examine the breaker points for burning and
pitting. Check breaker point gap, 0.015 inch.
SPARK PLUGS AND LEADS
Inspect spark plugs for dirty or broken insulators. Check
spark plug electrode condition and gap, 0.030. Inspect leads
for worn or frayed condition.
Inspect cables for fraying and corrosion. Clean corrosion
from the battery and tighten loose cable clamps. Check
specific gravity of electrolyte in each cell.
Check the adjustment. The clutch should engage and
disengage freely, hold securely when engaged, and not drag
TOWING SAFETY CHAIN
Inspect the safety chain for wear, broken links, and corrosion.
Replace worn or broken chain links.
Inspect generator, hoist, and pump drive belts for damage
and wear. Replace or adjust as necessary. Proper belt
adjustment will permit a 1/2 inch deflection midway between
SECTION IV. TROUBLESHOOTING
This section provides information useful to diag-
Malfunctions which may occur are listed in table 4-2. A
nosing and correcting unsatisfactory operation or
test or inspection procedure is listed under each
failure of the mixer and its components.
malfunction. The corrective action recommended is
described under the probable cause
Change 2 4-4