TM 5-3825-270-10
OPERATOR MAINTENANCE
EXCESSIVE ENGINE VIBRATION
INITIAL SETUP:
References
Equipment Condition
Discharge From Hose Reel Assembly (WP 0017)
Engine ON. (WP 0017)
TROUBLESHOOTING PROCEDURE
EXCESSIVE ENGINE VIBRATION
STEP 1
Does tachometer read at least 1500 RPM at operating speed?
NOTE
If engine RPM is not within normal operating range, engine may exhibit 'bogged down' or
'over run' symptoms and cause excessive vibration.
Start engine and observe tachometer. (WP 0017)
TACHOMETER
Figure 1. Tachometer - Step 1.
CONDITION/INDICATION
Does tachometer read at least 1500 RPM at operating speed?
DECISION
No - Increase or decrease engine rpm using engine speed RPM switch. (WP 0017) Ensure to operate water
distributor within proper guidelines and tolerances. Verify problem is solved. (Step 2 - Does engine exhibit
excessive vibration?)
Yes - Notify maintenance personnel engine exhibits excessive vibration.
STEP 2
Does engine exhibit excessive vibration?
Start and operate engine while observing engine vibration. (WP 0017)
