Too much Saki?

geok · Oct 13, 2022

Wonder if the little guy had too much Saki or he or she was too good to use timing marks. Sometimes wonder when I work on 30, 50 or 70+ year old equipment that hasn't been worked on for decades. What kind of day the worker that put it together was having. Gears were two tooth off but engine was in time.

grizz02 · Oct 13, 2022

was it that the gear was stamped wrong ? but who ever worked on it was smart enough to time the motor .

Fritz Maurer · Oct 13, 2022

Those are probably ,,hunting ,, gears.... the timing marks dont line up every 2 revolutions; takes like 15 or 20 before they all line up... like a 201 Ford.

Old Ford Mechanic · Oct 13, 2022

Fritz is correct.

Dieseltech · Oct 13, 2022

Some engines have an idler gear with an odd number of teeth so the gear teeth wear less. Such engines may have to turn 1500/2000 revolutions for the marks to align again.

caterpillar guy · Oct 13, 2022

Some engines are like Fritz and Dieseltech said takes a lot of revolutions to repeat the marks. Our MD took like 17 or something like that. It wwas last apart 45 or so years ago.

Keith True · Oct 13, 2022

I was putting a Perkins engine together,and was very careful to set the gears up.Turn it over,and can no longer get them to line up again.It was driving me nuts,and I just found out recently just what you just said.I'd have to turn it by hand for a week to make all the timing marks line up again.

geok · Oct 13, 2022

Oh, I wondered. Turn it over a dozen times and still wouldn't line up.

geok · Oct 13, 2022

Wondered why John Deere don't use timing marks on idler. Put #1 at TDC and use a straight edge for cam and pump. Service manual I have shows using a long screw driver to time them.

jm. · Oct 13, 2022

Like Fritz says it only lines up ever so many rounds and on some engines that so many is a lot. Notice that it is even off on both 2 behind and tw in front , that gear is just an idler gear so the cam to crank is right.

geok · Oct 14, 2022

This was a just for fun post. Like others have said, it's just an idler gear that had to be design to fit in space allowed. It's always interesting how different equipment is design. I have to take pictures of what I work on now to make it easier to reassemble. John deere doesn't have timing marks on crankshaft or idler. Service manual shows using a long screw driver to line up cam and pump. A few decades ago I bought and Old Taylor forklift that had a 332 Thunderbird engine in it. NAPA at the time couldn't get me a timing chain for it so I used a Mustang timing chain. Took some links out and made it work

BarnyardEngineering · Oct 14, 2022

I always wondered how that worked. Took me a while to realzie that all that matters is the ratio between the crank and cam gear. You can have any idler you want in the middle.

504 · Oct 14, 2022

I rebuilt a 3 liter V 6, and it was something like 6 revolutions before the marks lined up again.

miangus · Oct 14, 2022

Been there done that 203 Perkins.

Too much Saki?

geok

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grizz02

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Fritz Maurer

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Old Ford Mechanic

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Dieseltech

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caterpillar guy

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Keith True

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geok

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geok

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jm.

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geok

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BarnyardEngineering

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504

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miangus

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