CHAPTER 3
ORGANIZATIONAL MAINTENANCE INSTRUCTIONS
Section 1. PREVENTIVE MAINTENANCE SERVICES
35. Tools and Materials Required for Organizational Main-
tenance
The following tools and materials are required for organizational
maintenance of Projector PH-637 (*) /PFP :
Item
Sig C stock No.
Cloth, lint-free-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6Z1689
Lens cleaner, liquid - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8A819
Lens tissue - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - 8A2559
Camel's-hair brush - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
6ZI372
Screwdriver TL-456/U - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6R15211A
Srrewdriver, TL-105 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6R16410
Wrench,Allen- - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - - - -
6R55075-2
Wench,Allen - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6R37400-12
Wrench, open end -- - - - - -- - - - -- - - - - - - -- - - - - - - -- - - - - - - - - 6R35507-8.1
Caution: Emery cloth, sandpaper, crocus cloth, or similar abrasive
materials must not be used to clean the equipment. Use only the
cleaning agents specified.
36. Definition of Preventive Maintenance
Preventive maintenance means making systematic checks and ad-
justments at regular intervals to keep equipment operating at top
efficiency. It is not the same as troubleshooting or repair. The pur-
pose of preventive maintenance is to prevent breakdowns and the need
for repair. The purpose of troubleshooting and repair is to locate
and correct existing dejects. The importance of preventive main-
tenance cannot be overemphasized. Failure or inefficient operation
of one component of the equipment may cause the failure of the entire
unit. It is vitally important, therefore, that operators and repair-
men maintain their equipment properly.
37. Preventive Maintenance Checklist
The following checklist shows preventive maintenance procedures
f o r P r o j e c t o r P H - 6 3 7 ( * ) / P F P . The list contains information on
what to check, when to check, how to check, and precautions to be taken
before, during, and after checking.
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TAGO 4738B