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 419 of 694

TM 5-3895-372-20

Table 9 1.

Mixer-Auger System. Troubleshooting Procedures

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1.

MIXER-AUGER STALLS, WI LL NOT ROTATE, OR ROTATES SLOWLY:

Step 1.

Check that key between motor and auger is in place by locking auger with a pipe wrench and

activating control valve slowly.

Step 2.

Check hydraulic pressure.

Troubleshoot hydraulic system. See Table 10(1, Malfunction No. 3.

Hydraulic pressure should be set at 19002000 psi (13,100-13,800 kPa).

Step 3.

Inspect for buildup of hardened concrete on auger.

Clean all hardened concrete from auger.

2.

MIXER-AUGER VIBRATES:

Step 1.

Inspect for buildup of hardened concrete on auger.

Clean all hardened concrete from auger.

Step

2.

Inspect bearing and motor attaching hardware for tightness.

Tighten fastening hardware as required (refer to para 910).

3.

SWIVEL RING BINDS-CHUTE HARD TO MOVE:

Check for dirt, stones, or cement on swivel rings.

Remove material blockage as necessary.

Raise jack slowly. Place wood block and jack under rear plate of mixer-auger. Raise jack until dust seal is

broken. Lubricate rings liberally with heavy machine oil. Slowly lower jack.

9-2