TM-9-2330-227-14-P

SEMITRAILER, VAN: SHOP, 6-TON, SINGLE AXLE, M146

TECHNICAL MANUAL; OPERATOR’S, ORGANIZATIONAL, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)

JUNE 1985

TM-9-2330-227-14-P - Page 107 of 576

TM 9-2330-227-14&P

ORGANIZATIONAL TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

10. BRAKES WILL NOT APPLY OR RELEASE - CONTINUED

Step 3.

Step 4.

Step 5.

Step 6.

Step 7.

Step 8.

Step 9.

Check draincock on air reservoir.

If it is open, close (page 2-13).

If it is damaged, replace ( page 4-133).

Check for damaged or leaking air reservoir. Use soap solution, and coat

seams.

If air reservoir is leaking, replace (page 4-131).

Check master cylinder for damage or leaks.

If master cylinder is damaged or leaking, replace

(page 4-100).

Check fluid level in master cylinder (page 4-12).

If fluid level in master cylinder is low, fill to

proper level (page 4-5).

Check air lines and fittings for breaks, damage, or leaking air pressure.

Use visual checks and soap solution.

a. If fittings are loose, tighten

b. If air lines and fittings are damaged or leaking, replace or

repair (page 4-117).

Check for damaged air filters.

If air filters are damaged, replace (page 4-135).

Have assistant apply and release towing vehicle brakes. Emergency relay

valve should vent air through exhaust port when towing vehicle brakes are

released.

If air is not vented from relay valve when tractor brakes

are released, replace relay valve (page 4-140).

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