DIRECT SUPPORT AND GENERAL SUPORT
Section I. REPAIR PARTS SPECIAL TOOLS AND EQUIPMENT
perform direct and general support maintenance on the
2-1. Tools and Equipment
Tools and equipment issued with or authorized for the
concrete mixer are listed i the Basic Issue Items list, TM
2-3. Maintenance Repair Parts
Maintenance repair parts are listed and illustrated in TM
2-2. Special Tools and Equipment
5-3895-342-34P (when printed).
There are no special tools or equipment required to
Section II. TROUBLESHOOTING
corrective action recommended is described opposite
the probable cause.
This section provides information useful in diagnosing
and correcting unsatisfactory operation or failure of the
concrete mixer and its components. Malfunctions which
may occur are listed in table 2-1. A list of probable
Refer to table 2-1 for troubleshooting information.
causes is described opposite each malfunction. The
Table 2-1. Troubleshooting
1. Starting motor will not crank
Defective starting motor.
Low or dead battery.
Replace or recharge battery.
2. Engine fail to start or is hard to
Engine valves burned.
Dirty or faulty carburetor.
Clean and replace carburetor,
d. Dirty fuel tank and fuel
d. Drain fuel tank and service with
3. Engine stops.
a. Magneto defective.
b. Engine damaged by overheating
or lack of lubrication.
c. Broken crankshaft.
d. Broken camshaft
4. Engine noisy.
b. Connecting rods and main
b. Replace connecting rod, upper and
c. Valve tappets loose.
c. Replace a defective valve tappet
d. Valve spring broken or weak.
d. Replace a defective valve spring
e. Tighten or replace flywheel.
Flywheel loose or defective.
5. Engine mimes or runs erratically.
Valve burned, warped or broken.
c. Reface or replace valve seat (para
Valve seat cracked.
d. Governor defective.
e. Dirty carburetor.
e. Disassemble, clean, and repair
f. Drain contaminated fuel and
f. Dirt or water in fuel.
service with clean fuel
6. Engine lacks power.
a. Valves burned or sticking.