TM 5-3825-270-10
OPERATOR MAINTENANCE
WATER PRESSURE ERRATIC
INITIAL SETUP:
References
References (cont.)
Discharge From Gravity Sprinkler Bar (WP 0013)
Discharge From Sprinkler Nozzles (WP 0016)
Discharge From Hose Reel Assembly (WP 0017)
Discharge From Water Turret Assembly
Equipment Condition
Engine OFF. (WP 0017)
TROUBLESHOOTING PROCEDURE
WATER PRESSURE ERRATIC
STEP 1
Is engine speed erratic along with water pressure?
NOTE
Water pressure is directly proportional to engine speed. Any increase or decrease in engine
speed will effect the amount of water pressure at water stations.
1.
Start and run engine. (WP 0017)
NOTE
Engine speed should be a minimum of 1500 RPM when operating water stations. Engine lag
due to absence of load on engine may result in erratic engine speed and water pressure.
2.
Observe tachometer, WATER INLET, and WATER OUTLET gauges to verify if both engine speed and water
pressure are erratic.
WATER PUMP
INLET GAUGE
WATER PUMP
OUTLET GAUGE
Figure 1. Engine Speed, Water Inlet/Outlet Gauges - Step 1.