Case JX80 - Engine Troubleshooting - Performance Issues; Engine Overheating; Engine Lacks Power

4 SECTION 10 -- ENGINE -- CHAPTER 1
84176554 -- 03--2008
ENGINE TROUBLESHOOTING
(cont)
Problems Possible Causes Solutions
Engine overheating. 1. Coolant pump malfunction. Overhaul pump and replace if
necessary.
2. Thermostat faulty. Replace the thermostat.
3. Radiator inefficient. Remove internal deposits by flushing.
Check for leaks and repair.
4. Deposits in cylinder head and
crankcase coolant passages.
Flush out coolant system.
5. Coolant pump and fan drive belt
slack.
Check and adjust belt tension.
6. Coolant level low. Top up expansion tank with specified
coolant mixture.
7. Incorrect engine timing. Check and adjust engine timing.
8. Injection pump calibration incor-
rect -- delivering too much or too
little fuel.
Calibrate pump on test bench to va-
lues specified in calibration tables.
9. Air filter clogged. Clean filter unit and replace filter el-
ement if necessary.
Engine lacks power and
runs unevenly.
1. Injection pump timing incorrect. Adjust injection pump timing.
2. Auto advance regulator in injec-
tion pump damaged.
Overhaul injection pump and adjust
on test bench to values specified in
calibration table.
3. Control valve journal worn. Overhaul injection pump and adjust
on test bench to values specified in
calibration table.
4. Injection pump delivery irregular. Overhaul injection pump and adjust
on test bench to values specified in
calibration table.
5. All--speed governor damaged. Overhaul injection pump and adjust
on test bench to values specified in
calibration table.
6. Injectors partially obstructed or
damaged.
Clean and overhaul injectors and ad-
just pressure setting.
7. Impurities or water in fuel lines. Disconnect fuel lines from injection
pump and clean thoroughly. If
necessary clean and dry the fuel tank.
(continued)