TM 9-4110-255-14
4-26. HOURMETER M2 TESTING AND REPLACEMENT.
This task covers:
a. Testing
b. Removal
c. Installation.
INITIAL SETUP
Materials/Parts:
Equipment Conditions:
Lock Washers (2)
Refrigeration unit shut down (para 2-7) and battery
1, Appendix G
disconnected (para 4-35).
Self Locking Nuts (2)
Control box cover door raised and latched.
6, Appendix G
Marker tags (2)
4, Appendix E
a. Testing. (See Figure 1-4.)
(1) Be sure battery has been disconnected then remove two bolts (1) and lock washers (2). Open control
panel (3). Discard lock washers.
Figure 4-20. Hourmeter
(2) Tag and disconnect wire leads (4).
(3) Using multimeter set to measure continuity, check hourmeter (5) continuity between terminals. Continuity
should be indicated. If no continuity was indicated, replace hourmeter.
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