9. LUBRICATION
At installation and when changing oil, the crank-
case should be filled with a good grade of unused,
clean motor oil (See LO 5-4310-281-12).
Oil is drained by removing cap plug (27, fig.
9) from pipe.
Oil is added by removing fill
plug(39) and filling opening to overflow.
The electric motor is equipped with sealed-for-
life bearings and requires no further lubrication.
10. REPAIR AND REPLACEMENT
11. SPECIAL TOOLS
None.
12. DISASSEMBLY (figs. 8 thru 10).
The general disassembly procedure can
be determined by referring to the ex-
ploded view illustrations (figs. 8 thru
10).
Exceptions and
peculiarities
are
described in paragraphs 13 through 21).
NOTE
The equipment should be disassembled only to
the point where required repair or replace-
ment can be made.
13. BELT GUARD ASSEMBLY. The top bracket of
assembly is secured with the capscrew
the belt guard
(19, fig.10) for the high pressure cylinder head.
14.: V BELTS. To remove V belts, loosen screws
(5, fig. 8) and slide electric motor to reduce V
belt tension.
15. PRESSURE SWITCH ASSEMBLY. The pressure
switch assembly should not be disassembled. Replace
it as a unit.
16. MAGNETIC MOTOR STARTER. The magnetic
motor starter should not be disassembled except to
salvage heat coils (paragraph 4). Replace it as a unit.
17. VALVE ASSEMBLIES. (See fig. 10) When a
valve assembly is removed, it should be tagged for
identification of cylinder and whether it is an intake
or exhaust valve. Valve assemblies should not be dis-
assembled unless replacement of parts is necessary.
18. CRANKSHAFT.
(See fig. 9) C o n v e n i e n ce
slots are provided in the crankcase for removal of
the crankshaft.
19. BEARING ASSEMBLIES. (See fig. 9) Do not
remove a bearing assembly unless replacement of
parts is necessary. Knock bearing assembly off with
a soft hammer or other blunt instrument.
Take care
not to mar crankshaft.
Never insert anything against
inner race for removal.
20. PISTON CONNECTING RODS.
( S e e f i g . 9 )
Piston connecting rods are manufactured in two
matching parts.
When removing, tag both parts to
identify crankshaft location.
21. OIL SEAL.
The oil seal (See fig. 9) can be
knocked out with a blunt instrument through the hand
hole. A badly deteriorated oil seal can be dug out with
a screwdriver.
22. CLEANING
Clean the equipment with a washing solvent. Blow
or wipe dry before reassembly.
23. INSPECTION
Inspect all packing, seals, gaskets, pistons, rods,
and crankshaft.
Look for wear, scoring, cracks,
breaks, and distortion of parts.
24. REPAIR
Replace packing, seals, and gaskets.
Replace
broken, cracked and distorted parts. Replace both
parts of a piston connecting rod if one part is defec-
tive. Replace worn and scored parts if pressure loss
is evidenced in test procedure (paragraph 33).
The pressure switch assembly uses a diaphragm
to open and close a set of contacts (fig. 5). C l e an
contacts by using sandpaper lightly .-
Valves may become fouled by carbon or other for-
eign matter. Disassemble valve to clean. Seat and
disc may be lapped in on fine sandpaper if badly car-
boned. If a smooth finish cannot be obtained, replace
with new parts.
Before servicing the check valve, be sure pres-
sure is 0 psi. If disc at bottom of plunger is not clean
and free of scratches, lap in on fine sandpaper, turn
over to other side, or replace the part.
25. REASSEMBLY
Reassembly is essentially the reverse of disas-
sembly. Exceptions and peculiarities are described
in paragraphs 26 through 32.
26. PRESSURE SWITCH ASSEMBLY.
( f i g . 5 )
When a new pressure switch assembly is installed, it
should be adjusted according to paragraph 34.
27. MAGNETIC MOTOR STARTER. (figs. 6 & 7)
When a new magnetic motor starter is installed, the
correct heat coils should be installed according to
paragraphs 4 or 4.1.
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