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Old 12-24-2019, 08:56 PM   #1
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Coolant Drain

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.
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Old 12-25-2019, 07:59 AM   #2
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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.

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Old 12-25-2019, 08:08 AM   #3
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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. Click image for larger version

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Old 12-25-2019, 09:22 AM   #4
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Quote:
Originally Posted by catalinajack View Post
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. 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.
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Old 12-26-2019, 09:50 AM   #5
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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.


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Old 12-26-2019, 02:06 PM   #6
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Lehman engine?

Have you contacted American Diesel for help? If not then do so. Maybe they can help.
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Old 12-26-2019, 06:33 PM   #7
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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.
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Lehman engine?

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