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D4 -7 U

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1 month 3 weeks ago #230879 by Bluegrass1985
D4 -7 U was created by Bluegrass1985
Had our old tail seat D4 out this weekend pulling a old Cat thirty around trying to free up stuck tracks. The old tractor does smoke a little and the weather in northern KY was hot this weekend. It normally runs very well just driving it around the yard. All of the sudden it started missing. Does this sound like a injector problem?

Thanks Don

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1 month 3 weeks ago #230880 by Rome K/G
Replied by Rome K/G on topic D4 -7 U
Could be, injection pump lifter may be sticking, valve may be sticking, injector nozzle/capsule stuck or plugged.

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1 month 3 weeks ago #230882 by neil
Replied by neil on topic D4 -7 U
Or low fuel pressure. I broke the fuel filter tower drain pipe on my 5U a couple of weeks ago - fuel was pouring out the bottom, but the engine kept running although it had a miss. I was surprised at how the transfer pump keep enough fuel coming in to keep the injection pumps working enough to run the tractor for about another 3-4 minutes while I hightailed it over to the shed

Cheers,
Neil

Pittsford, NY

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1 month 3 weeks ago #230904 by Bluegrass1985
Replied by Bluegrass1985 on topic D4 -7 U
Are new injector nozzles still available and is there anything that can be done with existing nozzles?

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1 month 3 weeks ago #230907 by Rome K/G
Replied by Rome K/G on topic D4 -7 U
Yes they come as a "service group" with the o-rings. A fuel pump shop can check them also.

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1 month 3 weeks ago #230908 by Ray54
Replied by Ray54 on topic D4 -7 U
Always start with the simple things, change the fuel filters. Get the condensation out of the tower and fuel pump with fresh filtered fuel.

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1 month 3 weeks ago #230942 by Bluegrass1985
Replied by Bluegrass1985 on topic D4 -7 U
Has all new filters. Tower flushed and cleaned just before this happened

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