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 TM 55-1905-223-24-18-1
(3) Using machine rule, measure and record gap distance between pickup sensing
lug (2) on shaft flange (1) and end of motional pickup transducer (5).
This measurement will be used to install replacement motional pickup
transducer.
(4) Loosen jam nuts (6) and remove motional pickup transducer (5) and jam nuts
(6) from pickup mounting bracket (3).
Remove arbitrary scale meter (2, FIGURE 2-232) (wheelhouse panel).
b.
ENGINE RM DC PNL EP024 contains 24 Vdc. To
prevent injury to personnel 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) Turn off 24 VDC SUPPLY to dimmer rheostat (7).
(3) On wheelhouse console, gain access to bottom of console and tag and
disconnect wiring from meter terminals (5, 6, 8 and 9) on arbitrary scale
meter (10).
(4) Remove mounting screws (1 and 3) from top of console on appropriate meter
(2) and mounting hardware from bottom of console.
(5) Remove appropriate meter (2) from console.
Remove dimmer rheostat (7) (wheelhouse console).
c.
WARNING
ENGINE RM DC PNL EP024 contains 24 Vdc. To
prevent injury to personnel or 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 TCH (STBD) or #14, SFT TACH (port) to remove 24 Vdc
from port or starboard shaft tachometer circuit.
(2) Turn off 24 VDC SUPPLY to dimmer rheostat (7).
(3) On wheelhouse console, gain access to bottom of console and tag and
disconnect wiring from appropriate dimmer rheostat (7).
(4) Remove any mounting hardware and remove appropriate dimmer rheostat (7)
from console.
2-917
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