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 TM 55-1905-223-24-18-1
Remove arbitrary scale meter (engine control station console).
d.
ENGINE RM RC PNL EP024 contains 24 Vdc. To
prevent injury to personnel and damage to
equipment, use extreme caution when removing
fuse cartridges.
(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
from port or starboard shaft tachometer circuit.
(2) On engine control station console, gain access to bottom of console and
tag and disconnect wiring from appropriate arbitrary scale meter (6,
(3) On top of console, remove mounting screws (1) and mounting hardware from
bottom of console and remove appropriate arbitrary scale meter (2) from
console.
Repair of the electrical self generating tachometer is by replacing motional
pickup transducer (5, FIGURE 2-232), dimmer rheostat (7, FIGURE 2-232) and
arbitrary scale meter (2, FIGURE 2-232) or (2, FIGURE 2-233).
Install motional pickup transducer.
a.
(1) Position replacement motional pickup transducer (5, FIGURE 2-231) with jam
nuts (6) in pickup mounting bracket (3).
(2) Using machine rule, measure and position motional pickup transducer (5) to
gap measurement between pickup sensing lug (2) on shaft flange (1) and end
of motional pickup transducer (5) recorded in DISASSEMBLY step a.(3).
Secure jam nuts (6) ensuring gap distance is not disturbed.
(3) Connect connector assembly with cable (4) to motional pickup transducer.
ENGINE RM DC PNL EP024 contains 24 Vdc. To
prevent injury to personnel and damage to
equipment, use fuse puller to install fuse
cartridge.
(4) On ENGINE RM DC PANEL EP024, use fuse puller and install appropriate fuse
cartridge #14, SFT TACH (port) or #13, SFT TACH (STBD).
(5) Adjust motional pick transducer (5).
2-919
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