ARMY TM 9-6115-670-14&P
5-92
5.30. WATER TEMPERATURE GAUGE.
This task covers: a. Test
b. Replace
INITIAL SETUP
Tools
General Mechanic's Tool Kit
(Item 1, Appendix B)
Equipment Conditions
APU control unit disconnected from shelter
(JTACS and WIN-T).
Materials/Parts
Multi-meter
Water Temperature Gauge
TEST
a. Refer to FO-1 (SICPS/WIN-T), or FO-7 (JTACS), and disconnect plug J2 from P2.
b. Perform step “a.” of REPLACE procedure to gain access to meter.
c. Identify and tag terminal leads at rear of meter.
d. For each terminal, disconnect female terminal from spade terminals marked “+”, “-“, and “S”.
e. Measure resistance on terminals marked “+” to “-“ at rear of meter. Resistance reading should
be 192.0 ohms +/- 10 ohms.
f. Measure resistance on terminals marked “+” to “S” at rear of meter. Resistance reading should
be 140.0 ohms +/- 5 ohms.
g. If meter is not within the specified resistance, replace meter.
REPLACE
a. Remove ten screws, (caged nuts (SICPS), machine screws (JTACS and WIN-T)) (1, Figure
5-22) securing APU control unit cover to chassis and remove cover.
b. At rear of gauge (2), identify and tag terminal leads (3).
c. Disconnect terminal leads (3) from terminals by gently pulling apart.
d. Remove two nuts and lock washers (4) securing water temperature gauge (2) to mounting
bracket.
e. Carefully pull gauge (2) through front of APU control unit front panel (5).
