TM-9-6920-430-14

COOLANT RECHARGING UNIT, TRAINING GUIDED MISSILE SYSTEM M80 AND CHARGER, BATTERY PP-7309/T

TECHNICAL MANUAL; OPERATOR’S AND ORGANIZATIONAL DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL

AUGUST 1980

TM-9-6920-430-14 - Page 118 of 180

TM 9-6920-430-14

Table

MALFUNCTION

3-3. GPU Troubleshooting Guidance Chart (Continued)

TEST OR INSPECTION

CORRECTIVE ACTION

5. HIGH SQUEAL OR SQUEAK NOISE IS HEARD WHEN PUMP

IS OPERATING.

CHECK RUNNING TIME METER TO DETERMINE HOW

MANY HOURS HAVE ELAPSED SINCE DRIVE

MECHANISM (6) WAS LAST LUBRICATED.

IF OVER 150 HOURS HAVE ELAPSED SINCE LAST LUBRICATION, SERVICE UNIT

AS FOLLOWS: OPEN REAR ACCESS DOOR FOR ACCESS TO DRIVE MECHANISM

AND USING OIL CAN WITH SAE-10 OIL, SQUIRT OIL ONTO PISTON ROD. IF NOISE

PERSISTS, DRIVE MECHANISM IS DEFECTIVE, SHUT DOWN SYSTEM.

REPLACE COMPRESSOR ASSEMBLY IN ACCORDANCE WITH PARA. 3-18, (PAGE 3-76).

6. COMPRESSOR MOTOR RUNS WHEN ON SWITCH IS

DEPRESSED THEN STOPS WHEN ON SWITCH IS RELEASED.

IS STARTER RELAY REMAINING CLOSED?

USING AN AC VOLTMETER, CHECK VOLTAGE ACROSS STARTER RELAY TERMl-

CONTACTS ARE DEFECTIVE.

REPLACE STARTER RELAY IN ACCORDANCE WITH PAR A. 3-21, (PAGE 3-811.

7. RUNNING TIME METER DOES NOT OPERATE WHEN

COMPRESSOR IS RUNNING.

IS POWER BEING APPLIED TO METER TERMINALS

WHEN COMPRESSOR IS RUNNING?

USING AN AC VOLTMETER, CHECK VOLTAGE ACROSS METER TERMINALS

LABELED M1 AND M2 WITH COMPRESSOR RUNNING. IF 110 VAC IS PRESENT

RUNNING TIME METER IS DEFECTIVE.

REPLACE IN ACCORDANCE WITH PARA. 3-19, (PAGE 3-79).

M1416970A

3-58

Change 1