Farm Equipment - OT: Miss at low idle?

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OT: Miss at low idle?

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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=57630
Printed Date: 26 Oct 2025 at 9:50am
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Topic: OT: Miss at low idle?

Posted By: DSeries4
Subject: OT: Miss at low idle?
Date Posted: 30 Sep 2012 at 9:04am

I am looking at a Case 580D backhoe that has a miss at low idle only. Runs fine at high idle. It is a diesel engine, so I am thinking that the injector pump might need a rebuild. No sign of excessive smoke from the muffler.

What do you think it needs? Looks to be a good unit otherwise.

Thanks!

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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080

Replies:

Posted By: injpumpEd
Date Posted: 30 Sep 2012 at 9:17am

look at injectors first, if it's a Roosa pump it's not real common to lose just one cylinder. Possibly a pump problem, and servicing the pump and injectors would be a smart investment, if you can buy it right.

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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!