SPC 20 OPERATOR’S MANUAL
E-12 MAINTENANCE
SCENARIO #2 Thermal shut down (Overheating)
Late 1996 and newer Deutz powered or some recently updated machines are equipped with a
thermal shut down system. When the engine oil temperature reaches 266° F (130° C.), a relay is
grounded and the 12 V. power is cut to the shut down solenoid. This causes the engine to stop
suddenly (as if the key was turned off), then after a few minutes the engine can be restarted. Once
restarted, the engine will usually shut down again due to hot oil being recirculated through the
engine. Check the following items to resolve the problem:
1. Check the engine oil level. Fill as necessary
2. The oil cooler fins have plugged with fine debris (i.e. soybean pubescence). Check this by
starting the engine and moving your hand over the top of the oil cooler core on the topside of the
engine. Little or no air will be felt if the core is plugged. Blow compressed air on the topside of
the core to blow the debris out the bottom side. If the plugging is severe, it may be necessary to
physically remove the plug with something stiff such as a nylon wire tie. Be careful not to
puncture the core walls. Due to severity of this condition, you should adjust your maintenance
program so that the cooling core gets cleaned on a daily basis.
3. If the oil cooler core is not plugged, but little air is felt, check for a broken or loose axial fan
belt. Replace and/or tighten as necessary.
It is not advisable to disconnect the thermal shut down circuitry. Only if it is felt that the shut down
circuitry has failed should it be deactivated. Severe engine damage or total engine failure could
occur.
SCENARIO #3 Fuel related situations
Fuel problems usually develop slowly and cause the engine to stop gradually or lose power. These
problems are generally difficult to diagnose. Following is a discussion on the major components of
the fuel system.
All Deutz 1011 and 1011F engines have an individual injector pump for each cylinder. The volume
of fuel supplied to the injector pumps is critical. This volume should be at least twice the GPM that
the engine is using at full throttle. Diesel engine injection systems return at least 50 percent of the
fuel being pumped to the injectors back to the fuel tank. This is done for two reasons. One, to cool
the injectors and two, to help keep the fuel in the tank from gelling in cold weather. If the fuel system
is not working correctly, damage or premature wear to the injector pumps and/or the injectors may
occur.
SP One Auxiliary Lift Pump
The ALMACO SPC 20 and SHP50 combines are equipped with an auxiliary lift pump. Make sure
this pump and related components are in good working order. To check its operation, with the
ignition switch off, remove the fuel line from the inlet side of the main fuel pump located on the
engine. Route this line into a clear glass quart container. Turn the ignition switch and fuel pump
switch to the ‘on’ position. If the auxiliary fuel pump is working correctly and the hoses are clean and
unrestricted, the pump should transfer one-pint of fuel
to the container in thirty seconds. If it is less,
replace the fuel pump (and in-line filter) and run the test again. If the results are still not within the
required parameters, refer to the fuel tank section.
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