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3.Injection pump
Check the injection pump for items listed in the chart below and replace it if defective. Do not attempt
to make repairs by disassembling.
Test item Test method Criteria
Low idle speed Use a tachometer. Standard farm engine:
980 rpm
Exhaust smoke 1)Check by quickly increasing Not too much black or gray
engine speed under no-load smoke
condition.
2)Check by staring load.
Orifice discharge pattern Remove injection nozzle and Good discharge pattern
reinstall it with orifice toward
outside of engine. Look at
discharge pattern by cranking
the engine with starter.
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