M978 Tanker Maintenance Instructions (Cont)
Handle and store removed components carefully.
To ease assembly, lay out parts in the order they are removed during disassembly.
Plumbing tags are attached with wire, screws, or rivets. Do not remove or replace plumbing tags
unless missing or damaged.
Inspect parts as removed, for breaks, dents, cracks, surface defects or other damage. Turn in
defective parts. Set aside good parts for later use.
When unpacking items, remove all packing material (barrier paper, tape, plastic bags, and
Replace all gaskets, packings, and seals removed during repair. Replace all lockwire, lockwashers,
and cotter pins at time of assembly.
Replace broken, worn, or burned electrical wiring.
Replace broken, frayed, crimped, or soft flexible hoses. Replace stripped or damaged fittings.
Replace entire connected flexible hose if fittings are damaged. Hose clamps should not crimp
Replace screws, nuts, or fittings with damaged threads. Inspect tapped holes for thread damage.
If cross-threaded, retap hole for next oversize screw or stud. If retapping will weaken part,
Reshape elongated mounting holes by drilling oversize to receive bushing with required inner
diameter. Stake bushing in place with center punch.
When installing studs, use proper driver. Before driving stud, inspect hole for chips. Blow out
foreign matter, coat thread with film of antiseize compound, and start stud by hand.
Remove protective grease coatings from new parts before installation.
Lubricate all preformed packings with a thin coat of oil before installation.
To install preformed packing, stretch packing and place into position. Rotate component on flat
surface and uniformly press packing into position.
Remove all traces of old gasket and sealant before installing new gasket. During installation, coat
both sides of gasket with adhesive-sealant.
When replacing coupling gaskets, lubricate with a thin coat of grease before installation.
Use suitable lifting device, jack, or other aid when lifting the heavier components.
c. Follow these cleaning instructions when working on tanker components.
Adhesives, solvents, and sealing compounds can burn easily, and give off
harmful vapors, and are harmful to skin and clothing. To avoid injury or death,
keep away from open fire and use in well-ventilated area. If adhesive, solvent,
or sealing compound gets on skin or clothing, wash immediately with soap and
Compressed air used for cleaning and drying purposes will be reduced to 30 psi
and used only with adequate chip guarding and personal protection equipment,
goggles, shield, and gloves.
Soak parts in solvent, and wash away deposits by slushing or spraying. When necessary, brush
with oval paint brush moistened in solvent. Use jet of dry compressed air to dry parts, except
bearings, after cleaning. Bearings must drip dry.
Do not use wire brushes, abrasive wheels, or compounds to clean parts, unless specifically
approved in the detailed instructions.
Do not clean rubber parts in dry cleaning solvent. Wipe clean with a clean, dry, lint-free cloth.
Electrical parts, such as coils, junction blocks, and switches, should not be soaked or sprayed
with cleaning solutions. Clean parts with a clean lint-free cloth moistened with dry cleaning
d. Follow these inspection instructions when working on the tanker and tanker components.
Inspect all surfaces in contact with gaskets, coupling gaskets, or seals for nicks, burrs, or
scratches which might damage new seal during assembly. Remove any defects before assembly.