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Page Title: Section III. GENERAL MAINTENANCE
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Table
2-1.
Troubleshooting--Continued
Malfunction
Probable Cause
Corrective Action
f. Piston slap.
f. Replace  worn  pistons  (para  4-8
4. Engine makes excessive noise--Cont.
through 4-10).
a. Impeller
broken,
worn,
or
5. Pump runs  with  no  fluid
a. R e p l a c e i m p e l l e r ( p a r a 3 - 2
damaged.
discharger or with low discharge.
through 3-4).
b. Add or remove shims as required
b. Impeller-to-wear plate clearance
(para  3-2  through  3-4).    -
incorrect.
c. Replace volute (para 3-2 through
c. Volute excessively worn.
3-4).
d. Shaft seal defective.
d. Replace
shaft
seal
through 3-4).
a. Impeller loose.
a. T i g h t e n  i m p e l l e r ( p a r a 3 - 2
6. Pump noisy
through 3-4).
b. D i s a s s e m b l e  p u m p ;  r e m o v e
b. Foreign matter in pump.
foreign matter (para 3-2 through
3-4).
GENERAL
MAINTENANCE
d. Protect disassembled parts from blowing sand
2-5. General
and dust which could later cause rapid wear of the
This section contains general maintenance
gears, bearings, and machined surfaces.
procedures which are the responsibility of direct
support and general support maintenance per-
2-7. Care of Bearings
sonnel. The paragraphs contained here in describe
a. Clean all bearings by placing them in a wire
general practices applicable to several assemblies or
basket and immersing them into a container of
components of the pumping assembly which would
fresh cleaning solvent. Agitate the bearings in the
otherwise have to be repeated in each section of the
solvent to remove all traces of old lubricant.
manual assigned to those assemblies and com-
b. After the bearings are cleaned, dry them with
ponents.
clean, filtered compressed air. Take care to prevent
spinning the bearings with the compressed air jet.
2-6. Cleanliness
c. Dip the cleaned bearings in clean engine oil
a. Take care to assure that the work place is
and immediately wrap them in lint-free paper to
clean before starting to disassemble the engine or
prevent the entry of dust and dirt.
pump parts.
2-8. Seals and Gaskets
b. Steam-clean the exterior of the engine or
pump before starting disassembly to prevent the
Replace seals and gaskets of all components with
dirt from entering the bearings. Clean the exterior
each disassembly. The use of new gaskets and seals
of engine components with a cloth dampened with
will greatly reduce the possibility of leaking and
solvent.
will help prevent the entry of dust and dirt after
c. If compressed air is used to clean the parts,
reassembly.
make sure the compressed air is free from dirt and
Section IV. REMOVAL AND INSTALLATION OF MAJOR
C O M P O N E N T S AND AUXILIARIES
2-9. General
b. Removal of the pump from the engine
a. The pumping assembly is mounted on a frame
requires complete pump disassembly, since the
constructed of angular and tubular steel. The pump
pump impeller is screwed directly on the end of the
and engine assembly are mounted on a fabricated
crankshaft of the engine. The pump has n o
base which has handles for easy handling of the
bearings since the crankshaft rides in the engine
engine and pump assembly. An engine mounting
bearings. A seal is installed in the plate that adapts
plate on the pump and engine mounting base
the pump to the engine. This seal prevents leaking
adapts the engine for easy mounting.
around the rotating shaft.

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