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UNIT LEVEL TROUBLESHOOTING PROCEDURES Continued. -812530106
ECV ENGINE IDLE SPEED DOES NOT CHANGE cont'd -812530108

TM-10-5410-228-24 Chemical Biologiocal Protective Shelter (CBPS) System NSN 5410-01-441-8054 (Green) (EIC:5ZT) NSN 5410-01-482-4633 (Tan) Manual
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TM 10-5410-228-24
4.1 ECV ENGINE IDLE SPEED DOES NOT CHANGE (EPG SYSTEM INOPERATIVE) WHEN EPG IS
ENGAGED, INTERNAL POWER ONLY Continued.
1
No
If coil is open or shorted,
Resistance > 150 ohms?
replace pickup.
Yes
Check for continuity between each
pin to metal case of pickup.
Yes
Replace pickup.
Continuity?
No
Install insulated jumper between terminals 2 & 3
(TP1 & TP2) on EPG control unit.
Apply DC power.
Actuator goes full stroke (tachometer indicates
1400 to 1500 RPM) and DC voltage measured at
terminals 4(+) & 5(-) is within 3 v of supplied
voltage (24 VDC).
Turn power off.
No
Measure actuator coil resistance.
Actuator full stroke &
2.3 +/-0.4 ohms
voltage reads corectly?
Resistance within limit?
No
Governor still not operating.
5
Yes
4
2-21






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