TROUBLESHOOTING PROCEDURES - CONTINUED
Table 7. Water Spray System Troubleshooting Procedures - Continued.
TEST OR INSPECTION
Water Consumption Unequal Between 4. Check discharge of water spray 1. If 1 gal. or less of water is
pump of fullest tank. Remove
collected, replace water spray
Tanks - Continued.
four screws, washers and cover
from each bumper assembly.
Loosen two hose clamps and 2. If 1.0 to 1.5 gallons of water is
collected, remove plug cock,
disconnect input and output water
pressure gauge and line. Install
lines from water spray pump.
Attach a line from input side of
input and output water lines on
pump to a 5 gallon bucket full of
water spray pump with two hose
clean water. Attach a line from
clamps. Install cover on bumper
output side of pump to a pressure
assembly with four washers and
gauge and plug cock. Open plug
screws. Clean and inspect spray
cock. With water spray switch in
continuous run position, turn
battery disconnect switch and
engine start switch to ON position
(TM 5-3895-379-10). Close plug
cock slowly until pressure gauge
reads 20 psi. Place an empty five
gallon bucket under plug cock for
60 seconds. Remove bucket from
stream of water. Turn engine start
switch and battery disconnect
switch to OFF position (TM 5-
3895-379-10). Measure amount
of water collected in bucket.
Pump should discharge 1.5
gallons in 60 seconds at 20 psi.
WATER SPRAY PUMP