TM 5-3825-270-10
OPERATOR MAINTENANCE
CAB CONTROL BOX TACHOMETER DOES NOT OPERATE
INITIAL SETUP:
References
Equipment Condition (cont.)
Discharge From Hose Reel Assembly (WP 0017)
Universal Power Interface Kit (UPIK) harness
connected to prime mover. (WP 0012)
Main control panel switches in appropriate position
Equipment Condition
to operate water distributor using cab control
Engine OFF. (WP 0017)
box.
TROUBLESHOOTING PROCEDURE
CAB CONTROL BOX TACHOMETER DOES NOT OPERATE
STEP 1
Does main control panel tachometer operate?
NOTE
If tachometer on main control panel operates, fault can be isolated to cab control box or
universal power interface kit (UPIK) harness.
1.
Start engine. (WP 0017)
2.
Observe main control panel tachometer.
TACHOMETER
Figure 1. Tachometer - Step 1.
3.
Shutdown engine. (WP 0017)
CONDITION/INDICATION
Does main control panel tachometer operate?
DECISION
No - Notify maintenance personnel main control panel tachometer does not operate.
Yes - Go to step 2. (Step 2 - Are cab control box and water distributor harnesses connected properly to prime
mover?)