TM 55-2815-574-24
FIELD MAINTENANCE
ENGINE
TACHOMETER SENDING UNIT REPLACEMENT
INITIAL SETUP:
Tools and Special Tools
References
General mechanic's tool kit
FM 4-01.502
(WP 0179, Table 1, Item 130)
TM 55-1925-205-10
Materials/Parts
Equipment Condition
Marker tags, with metal eyelet patch Qty: 2
Propulsion module ventilated
(WP 0178, Table 1, Item 36)
(TM 55-1925-205-23)
Personnel Required
Engineer 88L
REMOVAL
WARNING
Remove all jewelry before conducting maintenance. Do not wear watches, rings,
identification tags, or other jewelry which could short across electrical components or catch
on vehicle components. Failure to comply may result in personnel injury or death.
1.
Place A3 breaker switch (Figure 1, Item 1), located on A10 panel, in OFF position. Refer to
TM 55-1925-205-10 for breaker location.
WARNING
Before attempting any maintenance, ensure power supply (switches, circuit breakers, etc.)
has been disconnected and locked/tagged out against unauthorized accidental start-up or
else death or serious injury due to electric shock and/or moving machinery could occur.
2.
Lock Out/Tag Out (LO/TO) A3 breaker switch (Figure 1, Item 1). Refer to FM 4-01.502 for LO/TO procedure.
Figure 1. A3 Breaker Switch.