Rotary injection pump question/definition

Deutz Lover · Jan 29, 2018

I have been looking at rotary injection pumps and some are listed as for "non-advance diesel engines". I cannot find a description of the difference between the two. Do some pumps have their own advance built in or does this mean older diesel engines that do not advance the injection timing?

Dieseltech · Jan 29, 2018

Yes, some pumps have no advance feature, are "fixed phase" timing. In most cases when engine speeds get above 2000 RPM is when advance is used. May be 3 degrees pump to 10 degrees pump for 1/2 speed pumps. Most IH M100 engine speed pumps have 14 degrees advance.

Deutz Lover · Jan 29, 2018

Dieseltech,

Thanks you for your response. So do all diesel engines use the advance that is part of the pump or do some diesel engines have a separate phase advance independent of the injection pump?

In this case the particular one I am looking at is the rotary pump used on A3.152 Perkins engines which are indirect injection. The description of the pump says for non-advance engines.

two of the pump numbers are as follows:
881306M91

3230F030

Thanks, DL

Dieseltech · Jan 29, 2018

Depends on the fuel system engine uses. High pressure systems like most older tractors use advance is built into the pump. Cummins low pressure PT fuel systems have camshaft operated injectors, some have advance by shifting the injector tappet sideways to change the timing. The 323 pump listed is a fixed phase pump.

Rotary injection pump question/definition

Deutz Lover

Member

Dieseltech

Well-known Member

Deutz Lover

Member

Dieseltech

Well-known Member

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