Gas/diesel dozer questions

Dozer Guy · Oct 22, 2008

I saw a dozer the other day at a local scrap yard that cought my eye, one side had a magnito, spark plugs, and wires.. the other side had a injection pump, lines, and injectors. How does this work? sorry for stupid question, but I never have seen this before and it just got me courious... I believe it was a International and it was a 4 cly. engine.

Anonymous-0 · Oct 22, 2008

Yes it was an IH. There older diesels started on gas, that is why the ignition, carb and all that good stuff. Then you switched them over to run on diesel. They accomplished this with a third small valve in the head and a chamber behind it for the lower compression needed for gas operation.

Dozer Guy · Oct 22, 2008

Was it only for warm up purpose only, or to just get RPMs to crank the diesel, or both?

R. L. Stevens · Oct 22, 2008

Hi,IH gas start diesels were made when electrical systems weren't advanced enough to spin them fast to start them. Heavy duty batteries and starters hadn't came along yet. JD and Caterpillar had pony motors at this same time frame to start their diesels.. The gas side just ran at a fast idle to warm the motor then you switched it to the diesel side.
Hope this helps, I've been up a while.
Bob

gregk · Oct 22, 2008

What happened on these is the engine actually started and ran on gasoline, but when it was warmed up then it was switched over to run on diesel. So you could say it was to get the rpm's. but I believe mostly to get the engine up to temp

MarkB_MI · Oct 22, 2008

These were a fairly common and successful engine. In gasoline mode a third valve opened in each combustion chamber to lower the compression ratio. I'm told that they could be hand-cranked fairly easily, although I've never done it myself.

Anonymous-0 · Oct 22, 2008

IHC had this technology in 1934, they built the wd40 tractor 1n 1935 which was the first diesel tractor to come out in north america. it switched over automatically to diesel. the later wd9s and so on were switched manually.JD did not come out with a diesel till 1949 with the model R . it had a 2 cyl. small gas pony motor to start the diesel engine. in its day i believe ihc still had the better tractors compared to the 2 cyl. jd ones.

old · Oct 22, 2008

It was for warm up only. Once good and warm it would run well on diesel, but a common problem was cracked heads if not shut down the right way

bison · Oct 23, 2008

seen an older cat with same setup the other day.

Back in europe I had a 1948 AC B tractor that had a duel tank ,started on gas, after warm up you could switch to kerosine,before shutdown you switched back to gas again.

Gas/diesel dozer questions

Dozer Guy

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Anonymous-0

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Dozer Guy

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R. L. Stevens

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gregk

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MarkB_MI

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Anonymous-0

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old

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bison

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