Welcome! Please use the navigational links on your left to explore our website.

Company Logo Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 
Marketplace
Classified Ads
Photo Ads
Tractor Parts

Community
Discussion Forums
Project Journals
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Galleries
Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Articles
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs
Glossary

Miscellaneous
Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
Ford 8N/9N Club
Kountry Life
  
Ford 9N, 2N & 8N Discussion Forum
:

Exploding Hydraulic Pump

Welcome Guest, Log in or Register
Author  [Modern View]
Mark Peteler

11-19-2020 09:52:22




Report to Moderator

All,

I am new to the forum. My 1952 8N has blown up the hydraulic pump twice now, following my replacing the pump guts (both valve packs, pistons, cam bushings). The pistons were ripped to pieces, the cam bushings worn to a frazzle and broken, and the second time the hydraulic fluid had huge amount of powdered brass throughout. I did not allow the pump to 'center' prior to tightening the pump to the tractor in either instance. Is this enough to cause the problem, or is there something else?

Thanks

[Log in to Reply]   [No Email]
TheOldHokie

11-20-2020 08:00:27




Report to Moderator
 Re: Exploding Hydraulic Pump in reply to Mark Peteler, 11-19-2020 09:52:22  
Quoting Removed, click Modern View to see

Garden hose and some Gunk SC mixed with diesel. Brush or spray the Gunk on, agitate with a parts cleaning brush, and flush with the hose. Repeat as needed.

TOH



[Log in to Reply]  [No Email]
Mark Peteler

11-20-2020 04:54:31




Report to Moderator
 Re: Exploding Hydraulic Pump in reply to Mark Peteler, 11-19-2020 09:52:22  
Thank you. I just looked at my broken scotch yokes and the pistons are slightly off center, as you noted. I was not aware of this, and I'm sure that at least one if not both of the pistons were off when I rebuilt the unit. That accounts for the huge damage. I will put this together correctly this time.

Any suggestions on how to get the minute fragments of brass out of the hydraulic system? it is deposited wherever the hydraulic fluid settles. I do not have a parts washer or any special cleaning equipment.

Thanks much

[Log in to Reply]  [No Email]
John Deere D

11-20-2020 07:20:58




Report to Moderator
 Re: Exploding Hydraulic Pump in reply to Mark Peteler, 11-20-2020 04:54:31  
I was probably given fifty different suggestions from fifty different owners on cleaning the common sump, Trans, Hyd, Diff.

To become acquainted I made my mind to go as per pictures..

Before I removed AXEL housing, I drained all OIL...added Diesel fuel.. inserted 1/4" steel line into top of Transmission..added 15 psi of air and agitated Diesel . Drained Diesel and repeated procedure.

I'm satisfied with the end results

Bob...Owner 2-N


[Log in to Reply]  [No Email]
Btzj02

11-19-2020 11:10:44




Report to Moderator
 Re: Exploding Hydraulic Pump in reply to Mark Peteler, 11-19-2020 09:52:22  
If I am understanding correctly you rebuilt the pump twice and each time it blew apart. Maybe a suggestion if it is a mechanical failure.....

Shop manual:
Note: The pistons on the scotch yokes are off center. Position the scotch yokes such that the pistons are at the closest position to each other. The recessed end of the cam is installed to the rear of the pump and fits over the shoulder of the power take-off bushing.

I know there is a popular video out there that if you do exactly as the video shows you will assemble the pump incorrectly. The scotch yokes will assemble incorrectly if you are not careful.

JB

[Log in to Reply]  [No Email]
Mark Peteler

11-19-2020 10:47:49




Report to Moderator
 Re: Exploding Hydraulic Pump in reply to Mark Peteler, 11-19-2020 09:52:22  
Sorry not used to system. Hydraulic oil was full. Lots of bushing shavings, almost a powder, in the oil, clearly a sign of wearing of parts.



[Log in to Reply]  [No Email]
Mark Peteler

11-19-2020 10:45:53




Report to Moderator
 Re: Exploding Hydraulic Pump in reply to Mark Peteler, 11-19-2020 09:52:22  
No water. Second time pump exploded just a few hours of running time after I had put some of the original parts back in. Same issue, pistons broken into small pieces, cam blocks mashed up bad. One of the valve packs (one of the originals) had a corner broken off and valves and springs exposed. This had to be mechanical damage, not over pressure.



[Log in to Reply]  [No Email]
TheOldHokie

11-19-2020 10:34:10




Report to Moderator
 Re: Exploding Hydraulic Pump in reply to Mark Peteler, 11-19-2020 09:52:22  
Quoting Removed, click Modern View to see

That is a lot of damage across a lot of parts and I doubt it's from centering. Is there any oil inside the pump when you tear it down?

TOH



[Log in to Reply]  [No Email]
Jim L WA

11-19-2020 10:10:57




Report to Moderator
 Re: Exploding Hydraulic Pump in reply to Mark Peteler, 11-19-2020 09:52:22  
Hi Mark, welcome to the forum. You didn't say if you found water in the sump. If it freezes and you try to run the pump, that will tear things up. Other that that, the others may have more suggestions.



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Today's Featured Article - Harvestin Hay: The Early Years (Part 2) - by Pat Browning. The summer of 1950 was the start of a new era in farming for our family. I was thirteen, and Kathy (my oldest sister) was seven. At this age, I believed tractor farming was the only way, hot stuff -- and given a chance I probably would have used the tractor, Dad's first, a 1936 Model "A" John Deere, to go bring in the cows! And I think Dad was ready for some automation too. And so it was that we acquired a good, used J. I. Case, wire tie hay baler. In addition to a person to drive th ... [Read Article]

Latest Ad: I NEED A CLUTCH DISC JD PART NUMBER AH800R FOR A H JOHN DEERE LET MEE KNOW WHAT YOU HAVE [More Ads]

Copyright © 1997-2020 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy