Farm Equipment - D19d overheating

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D19d overheating

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=129751
Printed Date: 07 Jun 2025 at 10:36am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: D19d overheating

Posted By: m16ty
Subject: D19d overheating
Date Posted: 08 Oct 2016 at 4:10pm

I was out running my D19d today and it started to overheat. The radiator was a little clogged so if figured that to be the problem so I cleaned it out and topped off the coolant.. When back to bush hogging and it overheated again right away. I then pulled the thermostat and it checked ok. Put it all back together and overheated again. I also tightened the fan belt because it was a little loose but that didn't help either.

My next thought is maybe the gauge is lying to me. With my temp gun on the head I'm reading around 180, the gauge is showing right at 220 (where the red starts), I don't know which one to believe. Are the AC gauges known to fail and read too high?

Any other suggestions as to why I'm overheating would be appreciated.

Replies:

Posted By: DougS
Date Posted: 08 Oct 2016 at 4:12pm

Is the water actually boiling and steaming from the cap? That's a true sign of overheating. If this was a sudden occurrence you may have a collapsed radiator hose.

Posted By: MACK
Date Posted: 08 Oct 2016 at 9:49pm

If you checked temp. On hose, there could be that much difference. Best to check on thermostat housing below thermostat.

I would guess your tractor gauge is bad. MACK

Posted By: m16ty
Date Posted: 08 Oct 2016 at 11:42pm

It did belch out a little water when I removed the cap but it wasn't much and it wasn't what I'd call boiling over when it got hot the first time. I could actually dip my finger into the radiator coolant for a very short period, while the gauge showed 220. That's what had me thinking that the thermostat wasn't letting the coolant circulate. A collapsed hose did cross my mind but they look ok from the outside and are fairly new.

I did use the temp gun on the head right at the thermostat housing but I question the accuracy of those things sometimes, partly because you can't tell for sure exactly what area you are hitting in a congested area. It also just measures surface temp, which I'd assume would be several deg cooler than internal temp.

I'm going to go to the parts store tomorrow and pick up a gauge and temporarily hook it up and see how it reads.

Posted By: DiyDave
Date Posted: 09 Oct 2016 at 6:29am

I'd believe the IR temp gun. I've had gauges that read, all over the place. In my D-10 and 12, the gauges consistently read +40ºF over. May be because the sending bulbs are right next to the exhaust manifold. On the 19D, I'd be worried about blown HG's, they have a propensity to do that...

Posted By: jaybmiller
Date Posted: 09 Oct 2016 at 6:39am

I'd remove rd cap, get he r good and warm then 'borrow' the wife's 'candy' thermometeror 'turkey' thermometer and check it that way. Have to agree the IR guns are bang on,but be nice to confirm with an 'old school' thermometer.

Jay

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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)

Never burn your bridges, unless you can walk on water

Posted By: m16ty
Date Posted: 09 Oct 2016 at 6:24pm

I went to fool with the tractor today and after it cooled off overnight, the gauge is still reading 160. I think I have a faulty gauge. I do think it got hot the first time and that must have screwed the gauge up for some reason.

I'm going to order a new gauge and go from there.