Section III. TROUBLESHOOTING
3-5. General
3-6. Troubleshooting
Malfunctions that may occur are listed in table 3-2. Each
This section provides information for diagnosing and
malfunction listed is followed by a test or inspection and
correcting unsatisfactory operation or failure of the crane
the recommended corrective action.
portion of the model M320T2 truck crane. Included in
Note: Malfunctions which are not included in
this section is a troubleshooting procedure and
this table will be reported to your supervisor.
procedures for field expedient repairs.
Table 3-2. TROUBLESHOOTING
1.
(MALFUNCTION) ENGINE WILL NOT CRANK OR START.
Step 1. (Test) Check for corroded battery cables and / or terminals. Cheek for loose battery cables.
(Corrective Action) Clean cables and/or terminals.
Tighten cables.
Step 2. (Test) Check fuel level.
(Corrective Action) Fill fuel tank.
Step 3. (Test) Check air cleaner for restricted air intake.
(Corrective Action) Service air cleaner.
Step 4. (Test) Check the distributor cap to see if the interior is wet.
(Corrective Action) Dry interior of the distributor cap.
2.
(MALFUNCTION) ENGINE OVERHEATS.
Step 1. (Test) Check that rain shutters are open.
(Corrective Action) Open rain shutters.
Step 2. (Test) Check radiator coolant level.
(Corrective Action) Add coolant.
Step 3. (Test) Check for loose radiator hose connections.
(Corrective Action) Tighten any loose connections.
Step 4. (Test) Check engine oil level.
(Corrective Action0 Add oil.
3.
(MALFUNCTION) BATTERIES DISCHARGE WITH ENGINE RUNNING.
Step 1. (Test) Inspect wiring and check for loose connections.
(Corrective Action) Tighten loose connections.
4.
(MALFUNCTION) LOW OIL PRESSURE.
Step 1. (Test) Check oil level.
(Corrective Action) Add oil.
5.
(MALFUNCTION) LIGHTS FAIL OR ARE DIM.
Step 1. (Test) Check for loose connections.
(Corrective Action) Tighten loose connections.
Step 2. (Test) Check for dirty lens.
(Corrective Action) Clean lens.
6.
(MALFUNCTION) REVOLVING FRAME WILL NOT SWING.
Step 1. (Test) Check swing clutch adjustment.
(Corrective Action) Adjust swing clutch.
Step 2. (Test) Check to see if swing brake is engaged.
Corrective Action) Disengage swing brake.
Step 3. (Test) Check to see if swing lock is engaged.
Corrective Action) Disengage swing lock.
7.
(MALFUNCTION) CRANE WILL NOT LIFT RATED CAPACITY.
Step 1. (Test) Check front or rear drum clutches for slippage.
(Corrective Action ) Adjust front and / or rear drum clutches.
8.
(MALFUNCTION) BOOM WILL NOT RAISE.
Step 1. (Test) Check to see if boom is already in highest position.
(Corrective Action) Lower boom.
Step 2. (Test) Check boom hoist clutch for slippage.
(Corrective Action Adjust boom hoist clutch.
3-4
