Temps

[putneyflash@...]

Not to butt in, But the Fan/steering pump is either a gear or vane pump and both depend on Rpm's to move oil, so there comes a point where you must have high rpm's to get the maxium flow to turn the hydraulic motor at its maxium, speed.

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RE

-------------- Original message from "Glenn Allen" : --------------

Pete,

Good Summary. Can you or someone elaborate on the following
questions I have about the areas of your post noted below relative
to a 1986 PT-40 6V92.

Thanks,

Glenn....(see questions noted below your comments):

> The transmission cooler is in the bottom of the
> water radiator. The other radiator you see is not the
> transmission cooler. (I don't think it even has a fan.) The air
> flow through the transmission cooler is from the main radiator
> fan.

1a) There is a small radiator attached on the outside bottom left of
the main radiator that has hoses running to the power stearing fluid
cannister. I assume this small radiator is cooling the fluid for
power stearing and the hydraulic fan. There is also a round
cannister down low that is between the driver's side of the engine
and the main radiator with large diameter (3"+) hoses from the
radiator and engine. There are also lines from the transmission.
I'm assuming this is the transmission heat exchanger. I would
assume water is flowing from the bottom of the radiator to the
transmission cooler and then to the engine. Is this correct?

1b)I notice on this transmission cooler there are plugs on each
end. Do these plugs drain the water or transmission fluid from the
heat exchanger (or maybe both)?

1c)Should this transmission cooler be cleaned or serviced?

> I think it comes on at 190 or so ... or whenever you turn on
> the "fan override" switch
> or turn on the dash AC.

2a) I believe my fan is "always on". When the engine temp is cool,
the AC is off, and the fan override is off, should the fan be
turning at idle speed or stationary?

2b) Is the speed of the fan proportional to the engine RPM?

3b) Where is the relay that the fan override switch controls?

Thanks for your insight.

Glenn Allen
1986 PT-40
Mar
ietta, GA