Will a weak hydro make an L2 run hot?
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=123232
Printed Date: 13 Oct 2025 at 11:21pm
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Topic: Will a weak hydro make an L2 run hot?
Posted By: Adam Stratton
Subject: Will a weak hydro make an L2 run hot?
Date Posted: 11 May 2016 at 10:56pm
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We have an 80 L2, unknown hours, big motor, hydro, rwa, rice machine. It has always ran hotter than our other L2s and the hydro has always been sluggish (won't pull in 4th, not even on the road if it's hot, sometimes not even 3rd if the bin is loaded) both problems have gotten worse since we've had it. Is the weak hydro making the motor run hot?
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Replies:
Posted By: SHAMELESS
Date Posted: 11 May 2016 at 11:16pm
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what kind of hyd fluis are you running? what's recommended? does the filter need changed? sound like there is a flow restriction somewhere on the hyd fluid or maybe the pump was changed sometime with a smaller pump? could be a lot of different things. if the pump is struggling, the engine will work harder and that will make it heat up too!
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Posted By: Adam Stratton
Date Posted: 12 May 2016 at 7:11am
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Shameless- everything is stock as far as I can tell. I have cleaned filters, run dexron atf, treat it like the rest of the fleet. I know the hydro needs dealt with, but was curious if that would solve my heating problems too. When I took the radiator to a shop, they said it was crammed full of stopleak and leaked like a seive when they cleaned it all out said it needed a core. I had another one off a donor combine and hoped that would fix it. I can tell the head has been off the motor and worked over, so I'm trying to figure out if the motor has a problem AND the hydro has a problem or if they are related. If they are both bad, I might not want to throw that much time and money at that older machine
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Posted By: MACK
Date Posted: 12 May 2016 at 7:45am
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If hydro is weak, it is bypassing oil which will heat the oil. The hot oil going through cooler will raise the engine temp. Sounds like you need the hydro rebuilt and done radiator prodded out. MACK
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