b. The preventive maintenance services to be
performed at quarterly intervals are listed and described
in paragraph 33. The number opposite each service
refers to a corresponding number on DA Form 464 and
indicates the services to be performed. The number
inspection requirements for the equipment.
33. Quarterly Preventive Maintenance Service
Before-operation services. Perform the before operation services listed in
Lubrication. Inspect the entire pumping unit for damaged oil lines, leak-
ing oil seals, and indications of insufficient lubrication.
Lubricate in accordance with the current lubrication order. Replace dam-
aged lines or fitting. Correct or report all deficiencies to field man-
Tools and equipment. Inspect the condition of all tools and equipment
assigned to the unit.
Make sure they are clean and properly stowed or mounted.
Fire extinguisher. Inspect the bromochloromethane type fire extinguish
er for insufficient charge, judging by sound and weight. Do not
discharge contents.- Inspect for excessive corrosion and insecure
Correct all deficiencies or report them to field maintenance. Refer to
field maintenance for refilling and maintenance. Weigh a monobromo-
tribluoromethane type fire extinguisher every six months and replace
the cylinder if the gross weight has decreased four ounces or 'on
Lubricate the cylinder neck threads with one drop of OE 30 oil
Publications. See that a copy of this manual, TM 5-280 -20912, the
current lubrication order, and DA Form 285 are on or with the equip-
mnent and in serviceable condition.
Appearance. Inspect the general appearance of the pumping unit, pay-
ing special attention to uncleanliness, illegibility of identification mark-
ings, and poor condition of paint.
See that all deficiencies noted are corrected' or reported to field
Modifications. See that all available modification work orders applying
to this pump unit have been complied with and recorded on DA Form
478, DA Form 5-73, and DA Form 5-73a, as applicable.
Cylinder head, manifolds, mufflers, and exhaust pipe. Inspect the in-
take and exhaust manifolds for crack, breaks, lose mounting, and
evidence of leakage. Inspect the muffler and exhaust pipe for loose
mounting, leaks, and excessive rust.
Tighten all mounting hardware. Replace a defective intake or exhaust
manifold, gaskets, muffler, and exhaust pipe (TM 5-280209-12)
Valve mechanism. Inspect the valve cover and gasket for signs of dam-
age. Inspect the valve mechanism for defective part. Make r
that the valve mechanism is receiving sufficient lubrication.
Replace a defective valve cover or gasket (TM 5-2805-209-12). Report
defective valves or insufficient lubrication to field maintenance.
Compression test. Refer to TM 5-2805-2o09-12 and test the compres-
sion of each cylinder.