Gleaner F bogs down when hot

irishhill · Nov 14, 2017

1974 Gleaner F diesel, non-turbo, picking beans. Runs and works well for about an hour, then everything begins to slow/bog down, drive speed, separator...everything. Engine sounds overloaded. Quit and let cool for hour, fine until gets hot, then bogs down again. I suspect something related to traction drive or main clutch binding, but before tearing in thought someone might have an idea.

Bob Bancroft · Nov 14, 2017

I would sooner suspect a fuel issue.- Screen in tank, sediment bowl, return line plugging. Has the injector pump been overhauled?

jfreed · Nov 14, 2017

Check for a failed bearing behind the seperator clutch,don't ask how I "might know". Pulls RPM's down a bunch

irishhill · Nov 14, 2017

Thanks, that was first thought. Injectors/pump not overhauled, but I have changed filters, cleaned sediment bowl and screen, checked all fuel lines, drained/freshened fuel. Might still be the pump, but it only happens after it's been working for a while, and after it cools a bit it is like something "released". Not ruling out the pump, just thought someone might have had similar issue.

centash · Nov 14, 2017

Tank vent? Ben

Skyhighballoon(MO) · Nov 15, 2017

When you cleaned the sediment bowl and screen, did you turn the shut off valve back on with the bowl off and make sure you had two good streams of fuel come out both sides - shooting out at least at a 45 degree angle, not dribbling straight down? With my new to me F2, I have some algae issues that I've treated with biocide but the dead algae (kind of a black goo) clogs up the inlet to the sediment bowl and you get a loss of power. When it works right, my fuel restriction sensor light come on in the Tattletale II panel and I can clean it out before it bogs down. Have to take a small wire or zip tie and thread up both inlet holes to the bowl to clean it out. Throw away the screen too on the sediment bowl, it's pretty much useless, diesel filter will catch far finer stuff than it will. Heavy particles will settle in the bottom like they should. Mike

irishhill · Nov 25, 2017

Thanks for all the replies, but it looks like jfreed has seen this before. After going through the fuel system again and finding nothing, ran for about 30 minutes and bogged down hard. Used I/R non contact thermometer and bearing temp behind the traction drive sheaves was spiked. Finally finished getting it apart today and it has obviously been very hot/seizing.
On another note, I think service manual writers must be either clueless or have twisted humor when a single process reads: "remove sheaves, bearing flanges, spherical ring, bearing, and shaft"
...and it takes two days!

Bob Bancroft · Nov 25, 2017

Glad you found it. I've never experienced that. I'm surprised that engine could be drawn down like that without something getting busted up.

Gleaner F bogs down when hot

irishhill

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Bob Bancroft

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jfreed

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irishhill

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centash

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Skyhighballoon(MO)

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irishhill

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Bob Bancroft

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