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7020 Engine Noise

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
Printed Date: 18 Nov 2019 at 3:51pm
Software Version: Web Wiz Forums 11.10 -

Topic: 7020 Engine Noise
Posted By: Blustery Knoll Farm
Subject: 7020 Engine Noise
Date Posted: 17 May 2018 at 11:19pm
Well, I have another 7020 problem. Pulling the field cultivator today, I noticed a bit of hot oil smell, then saw that the temperature gauge was running almost 210. Usually it's quite a bit lower than that under load. I stopped and idled to let it cool off a bit. After it cooled to where it normally would run, I started driving again and geared down to the next lower speed and it still wanted to heat up again. Then it developed a knocking sound. So, did I spin a rod bearing or something nasty like that?

It has been loosing coolant very slowly since I bought it. I kept finding little leaks from loose clamps and fittings, so I figured that was where it was going, but it's still happening, even though I think I finally fixed the last of those. There wasn't any coolant in the oil when I changed it last month though.

So, what's the next step to diagnose this without sending a rod through the block? Drop the pan and start pulling rod caps?

Posted By: MACK
Date Posted: 18 May 2018 at 6:47am
I would say antifreeze going past sleeves oring onto piston skirt scored a piston.    MACK

Posted By: Blustery Knoll Farm
Date Posted: 19 May 2018 at 8:13am
Well, the motor is going to have to come out to change the torque limiter anyhow, so I guess I will just start taking things apart then.

Another detail. It was intermittently making a really nasty screeching sound, kind of like a dry alternator bearing, but I checked and it and the water pump spun fine.

Posted By: Sugarmaker
Date Posted: 20 May 2018 at 8:47am
Sounds like a large project. Hope you have back up equipment during the down time!
I like your farm name! 

D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Ford Jubilee, IH TD6 Many IH Cub Cadets

Posted By: Blustery Knoll Farm
Date Posted: 20 May 2018 at 10:47pm
Yeah, I do have backup equipment, and I am done with most of the spring tillage. So, I just have to use the smaller tractors and tillage equipment for the rest of the spring.

Posted By: GM Guy
Date Posted: 06 Jun 2018 at 1:44am
The screech sounds like chunks of rings trying to exit.

Wasnt this the tractor that ran really hot (fueling issues) when you first got it? I would say it is damage from that finally showing its face.

Gleaner: the properly engineered and built combine.

If you need parts for your Gleaner, we are parting out A's through L2's, so we may be able to help.

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