TM-5-3895-372-20

CONCRETE-MOBILE MIXER BODY M919, MODEL 8CM-24/F

TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE MANUAL

AUGUST 1980

TM-5-3895-372-20 - Page 131 of 694

TM 5-3895-372-20

Table 5-1.

Water System Troubleshooting Procedures.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1

MIX WATER DOES NOT FLOW AT A STEADY RATE:

Step 1. Check that:

a.

Tank is filled.

b.

Water shutoff valve is open.

Fill tank, open valve.

Step 2. Check water pump V-belt tension. Belt should deflect 9/64 in. (3.6 mm)

when 6 lbs (27 N) pressure is

applied.

Adjust belt (para 4-16D).

Step 3. Check that tachometer reads 1620-1720 rpm.

Use throttle to adjust pump speed.

Step 4. Check for dirt or sediment in water tank.

Flush system with clean water.

Step 5. Check for blocked strainer.

Clean strainer (para 5S).

Step 6. Check water lines for leaks.

Replace leaking lines (para 5-12).

Step 7. Check water system pre e.

Adjust pressure relief valve (TM 5-3895372-10).

5-3