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 TM 55-1905-223-24-18-1
Repair Electrical Self Generating Shaft Tachometer.
This task covers:
a. Disassembly, b. Repair, c. Assembly.
Equipment Condition
Appropriate main propulsion engine
Tool kit, general mechanic's,
shut down. Refer to TM 55-1905-223-
Fuse puller, 5120-00-224-9453
10.
Main propulsion engine tagged "Out of
Service - Do Not Operate."
Materials/Parts
Starting air and control air valves to
main propulsion engine closed and
Motional pickup transducer
tagged "Out of Service - Do Not
P/N M917
Operate." TM 55-1905-223-10.
Rheostat P/N R5303
Arbitrary scale meter P/N DB1701
(illuminated)
Arbitrary scale meter P/N DB1802
Warning tags, Item 1, Appendix C
Appropriate main engine must be shut down,
to prevent serious injury, before performing
the following steps.
Remove notional pickup transducer.
a.
ENGINE RM DC PNL EP024 contains 24 vdc. To
prevent injury or damage to equipment, use
extreme caution when removing cartridge
fuses.
(1) On ENGINE RM DC PNL EP024, use fuse puller and remove appropriate fuse
cartridge #13, SFT TACH (STBD) or #14, SFT TACH (port) to remove 24 Vdc
power from shaft tachometer circuit.
(2) Disconnect connector assembly with cable (4, FIGURE 2-231) from motional
pickup transducer (5).
2-915
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