Coolant Drain

Iambe · Dec 24, 2019

Trying to locate coolant drain on 4D254-80 hp Lehman engine. Found the petcock near the alternator but I was told that there is a lower one close to the lift pump at 11 o’clock position. Could not find it. I would think it would be in a similar position on the 135.

O C Diver · Dec 25, 2019

If you don't have a manual, a Google search found both the 80 and the 135 online. I would assume they would have the locations shown or explained.

Ted

catalinajack · Dec 25, 2019

It may be different on an 80 or 135, but here's a picture of a Lehman 120. The petcock is to the left of of the air intake.

Cigatoo · Dec 25, 2019

catalinajack said:
It may be different on an 80 or 135, but here's a picture of a Lehman 120. The petcock is to the left of of the air intake. View attachment 97791

You may not have a petcock. It might be a plug. Or it may have a water heater or something of that sort plumbed in.

kchace · Dec 26, 2019

I can tell you that the drain petcock shown in post #3 is in the same position on the 135's. I have never heard of one near the lift pump.

Ken

C lectric · Dec 26, 2019

Lehman engine?

Have you contacted American Diesel for help? If not then do so. Maybe they can help.

catalinajack · Dec 26, 2019

No need to bother Brian. The petcock/drain plug is where I said it is in the picture. I recently used them to refresh the coolant in my 120s.

C lectric said:
Lehman engine?

Have you contacted American Diesel for help? If not then do so. Maybe they can help.

Coolant Drain

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