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 202 of 694

TM 5-3895-372-20

Table 6-1.

Admix Systems Troubleshooting Procedures (Continued).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

5. QUICK OPENING VALVE STICKS (Continued):

b. tightness of packing nut.

Tighten until valve sticks, then back off just until valve operates freely.

Step 2.

for sediment or gelatinous mass blocking valve.

a. Flush system.

First use cleaning agent recommended by admixture manufacturer.

Then use clean

water.

b. Clean strainer screen (para 6-8).

6. FLOWMETER DOES NOT RETURN TO ZERO:

Step 1.

Check whether quick acting valve is sticking.

See Malfunction No.

5.

Step 2.

Check for dirt in flowmeter.

Disassemble and clean flowmeter (para 6-11).

7. DRY ADMIX SYSTEM INOPERATIVE

:

Step 1.

Check for main clutch engagement.

Adjust if necessary (para 4-18).

Step 2.

Check for dry admix bin clutch engagement and if chains and sprockets are in operating condition.

Engage

clutch.

Step 3.

Check operation and correct dial setting.

Set dial indicator (refer to para 6-19).

Step 4.

Check operation of dry admix bin.

Repair as necessary (refer to para 6-19).

6-8