Injector seat cleaning 670T
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=202472
Printed Date: 22 Sep 2024 at 5:26pm
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Topic: Injector seat cleaning 670T
Posted By: rmullican
Subject: Injector seat cleaning 670T
Date Posted: 28 Jul 2024 at 8:39am
I am in process of pulling injectors and will be getting pump rebuilt on 670T from my 8030. What is a good way of cleaning injector seats with head still on engine?
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170 W/FEL, 7010 PD, 8030 FWA PS
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Replies:
Posted By: 8070nc
Date Posted: 28 Jul 2024 at 11:50am
Somebody may have a better way but id plumb a air line into the intake manifold with some way to control flow. Air will come out which ever cylinder the intake valve is open on. Air flowing out will help prevent debris from falling on a piston
Take a round brush on a drill a little larger than the injector hole and clean the hole with air coming out. Rotate the engine until air comes out a different cylinder. Cleann that one and continue the process until you have done them all
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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
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Posted By: SteveM C/IL
Date Posted: 28 Jul 2024 at 1:37pm
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The seat is the copper washer. Shouldn't require much cleaning just replacing washer.
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Posted By: rmullican
Date Posted: 29 Jul 2024 at 6:10am
Thanks for the replies, all the copper washers are out and I plan on replacing those. Just trying to get an idea on how to clean the crud out of the injector holes without it dropping into cylinders.
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170 W/FEL, 7010 PD, 8030 FWA PS
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Posted By: DougG
Date Posted: 29 Jul 2024 at 11:23am
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Well what I do is, blow it off with air before, but ; Id just be careful to watch so not much stuff gets in there, that concave copper washer seals everything ; shouldnt be no big deal,,
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Posted By: SteveM C/IL
Date Posted: 30 Jul 2024 at 12:53pm
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I suppose you could drop a short bolt in the hole then scrape around the bore to "clean" it then hold down on bolt while blasting air in there to purge hole. Finally use pen magnet to pull bolt out. Were the rubber dirt seals missing on old injectors?
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Posted By: injpumpEd
Date Posted: 30 Jul 2024 at 1:33pm
I use a long skinny screwdriver to scrape the carbon off the bottom, wire brush in the bore if needed, then brakleen it, blow dry, some will go in the cyl, but will be blown out right away, it's not like you're dropping huge chunks in there.
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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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Posted By: rmullican
Date Posted: 31 Jul 2024 at 7:35am
Thanks everyone, the rubber dust shields were in place, just looking to clean up the flaking rust from bore where injector slides in. Looks like tractor has sat outside for some time as injectors were kind of rusted in place. Top surface of head I was able to get reasonably clean. Plan is to use big shop vac and wire brush to clean up bore and the address any carbon build up on seat where copper washer sets
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170 W/FEL, 7010 PD, 8030 FWA PS
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Posted By: Lynn Marshall
Date Posted: 31 Jul 2024 at 5:40pm
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After cleaning the holes, I usually spin the engine over with the starter to hopefully blow any foreign material out of the cylinders.
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