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D4 6u
D4 6u
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1 week 3 days ago #261581
by Busso20
Does anyone know if there is a mesh/gaze screen in the lines from tank to pump? we had a block in one in a front end loader years ago, would start ok then slow to stop, no power etc etc, have you removed fuel tank to clean out and checked fuel tap itself to make sure it is fully open and not blocked?
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1 week 1 day ago #261605
by juiceman
First off, if it was my machine, I would get the pony or electric starting functions working instead of pull starting.
You mention it "runs" on starting fluid. I have had folks pull start a machine only to find out the throttle lever was not engaged (opened). Machine was running only on starting fluid and no diesel was going to the engine...
Make sure you "snap" the throttle open hard to have the fuel opened up.
The injection pump body has a rectangular cover on the side, remove the cover, as you are turning the engine over and throttle "open", the 4 lifter bodies or plungers some call them, should all be moving up and down. Spray it generously with some penetrating oil. You should open up the hex nut at the bottom right to make sure the pump has plenty of oil in it as well. That's all I can say without being wordy... A stuck rack would be when some if not all of those plungers move up and down freely while engine is spinning.
Operators manuals and service manuals are a lifesaver if you do not already own some.
Joining the club as a paid member allows you access to these items in the library. JM
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2 days 16 hours ago #261646
by trainzkid88
make sure the governor lever is all the way open it will sort of click over a notch. when you remove the side cover off the injector pump check the fuel rack moves back and forwards under spring tension it should "float' when working properly.
how i was taught to start ours was run the pilot engine on its own till you start feeling the intake manifold getting warm then with the main decompressed and the governor in the stop position engage the pinion and starting clutch to wind the main over and build oil pressure. once oil pressure is up drop the decompression off let her have a few winds to get some hot air in the cylinders and the open the fuel she should roar to life pretty quickly throttle back to idle straight away. turn the fuel off to the pilot engine and let it run out of fuel.
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Antique Caterpillar Machinery Owners Club
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D4 6u
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