9. LUBRICATIONAt 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 fillplug(39) and filling opening to overflow.The electric motor is equipped with sealed-for-life bearings and requires no further lubrication.10. REPAIR AND REPLACEMENT11. SPECIAL TOOLSNone.12. DISASSEMBLY (figs. 8 thru 10).The general disassembly procedure canbe determined by referring to the ex-ploded view illustrations (figs. 8 thru10).Exceptions and peculiarities aredescribed in paragraphs 13 through 21).NOTEThe equipment should be disassembled only tothe point where required repair or replace-ment can be made.13. BELT GUARD ASSEMBLY. The top bracket ofassembly is secured with the capscrewthe 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 Vbelt tension.15. PRESSURE SWITCH ASSEMBLY. The pressureswitch assembly should not be disassembled. Replaceit as a unit.16. MAGNETIC MOTOR STARTER. The magneticmotor starter should not be disassembled except tosalvage heat coils (paragraph 4). Replace it as a unit.17. VALVE ASSEMBLIES. (See fig. 10) When avalve assembly is removed, it should be tagged foridentification of cylinder and whether it is an intakeor 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 ceslots are provided in the crankcase for removal ofthe crankshaft.19. BEARING ASSEMBLIES. (See fig. 9) Do notremove a bearing assembly unless replacement ofparts is necessary. Knock bearing assembly off witha soft hammer or other blunt instrument.Take carenot to mar crankshaft.Never insert anything againstinner race for removal.20. PISTON CONNECTING RODS.( S e e f i g . 9 )Piston connecting rods are manufactured in twomatching parts.When removing, tag both parts toidentify crankshaft location.21. OIL SEAL.The oil seal (See fig. 9) can beknocked out with a blunt instrument through the handhole. A badly deteriorated oil seal can be dug out witha screwdriver.22. CLEANINGClean the equipment with a washing solvent. Blowor wipe dry before reassembly.23. INSPECTIONInspect all packing, seals, gaskets, pistons, rods,and crankshaft.Look for wear, scoring, cracks,breaks, and distortion of parts.24. REPAIRReplace packing, seals, and gaskets.Replacebroken, cracked and distorted parts. Replace bothparts of a piston connecting rod if one part is defec-tive. Replace worn and scored parts if pressure lossis evidenced in test procedure (paragraph 33).The pressure switch assembly uses a diaphragmto open and close a set of contacts (fig. 5). C l e ancontacts by using sandpaper lightly .-Valves may become fouled by carbon or other for-eign matter. Disassemble valve to clean. Seat anddisc may be lapped in on fine sandpaper if badly car-boned. If a smooth finish cannot be obtained, replacewith new parts.Before servicing the check valve, be sure pres-sure is 0 psi. If disc at bottom of plunger is not cleanand free of scratches, lap in on fine sandpaper, turnover to other side, or replace the part.25. REASSEMBLYReassembly is essentially the reverse of disas-sembly. Exceptions and peculiarities are describedin paragraphs 26 through 32.26. PRESSURE SWITCH ASSEMBLY.( f i g . 5 )When a new pressure switch assembly is installed, itshould be adjusted according to paragraph 34.27. MAGNETIC MOTOR STARTER. (figs. 6 & 7) When a new magnetic motor starter is installed, thecorrect heat coils should be installed according toparagraphs 4 or 4.1.4
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