Construction and other equipment - Question about idling a 1955 271

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Question about idling a 1955 271

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=129322
Printed Date: 28 Sep 2024 at 2:22pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Question about idling a 1955 271

Posted By: heron
Subject: Question about idling a 1955 271
Date Posted: 28 Sep 2016 at 9:24am

Quick question: I know the Detroits don't like low rpm but does it hurt the motor to low idle it or when sitting is it better to keep it at a medium idle. I've always heard to never low idle it, as fuel will leak into the cylinder but I wanted to make sure.

Replies:

Posted By: ac_sd
Date Posted: 28 Sep 2016 at 10:08am

No prolonged idling of the "71 Seies" or other 2cycle detroits ! They will "load up" and start spitting oil !! The manuals all recommend letting temperature stabilize at a high idle and then shutting them down ! Navy used them in everything and abused the heck out of them with tremendous reliability, but they didn't idle them very much other than to bring them up to temperature !

Posted By: heron
Date Posted: 28 Sep 2016 at 1:01pm

Okay, so don't let it low idle but if needs to idle just keep it about midway...that is what my dad always said but if I'm walking the machine, up and down on a low boy or trying to get it into a tight place a high idle is too fast...hence my question. Thanks much for the reply. This motor has always run like a top. At a lower idle it's smoother than my duramax.

Posted By: wfmurray
Date Posted: 28 Sep 2016 at 1:20pm

In trade school they said to let the engine surge instead of idle smooth. Keeps engine from getting to cool.

Posted By: Dan73
Date Posted: 28 Sep 2016 at 1:30pm

The Detroit we had couldn't get out of it's own way unless it was opened up good then heaven help you she would walk off pulling the world behind her. But yes don't idle it we got in alot of trouble with people doing that waiting for the chopper to finish a load.

Posted By: Coke-in-MN
Date Posted: 28 Sep 2016 at 8:56pm

Engine idle is a choice - I did but kept it up higher to be sure oil pressure was in operating range - big thing is if you are leaving machine set running do so with transmission in neutral and clutch engaged as the brass bushing in the clutch housing will be carrying the weight of the bearings and throw out levers unless you do .

There are grease zerks on the brass but even so the unit wears

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Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."

Posted By: ac_sd
Date Posted: 01 Oct 2016 at 9:24pm

If a 2 cycle Detroit is loping or "surging", the governor is not adjusted correctly !! idling it for short periods (loading the machine) won't hurt anything !