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
Classified Ads
Photo Ads
Tractor Parts

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

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

Research & Info
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

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 Tractors Discussion Forum

Ford 3930 pto problem

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

12-31-2018 10:57:24

Report to Moderator

I just installed a pto into a 3930 that did not come from the factory with one. Clutch, output shaft, plumbing for hydraulics, the whole thing.
I got tractor put back together, filled with oil, and started. The pto shaft spun momentarily, maybe ten seconds, then stopped. With tractor running, and pto lever in any position, it feels like the pto brake is on, I can hardly move the pto shaft with short channel locks. Engine off, I can freely spin shaft by hand.

[Log in to Reply]   [No Email]

01-01-2019 06:23:49

Report to Moderator
 Re: Ford 3930 pto problem in reply to Rpclark88, 12-31-2018 10:57:24  
Quoting Removed, click Modern View to see

I'm sure I will have to split it again to remedy the problem, but diagnosis should be possible from the external symptoms.
There was only one way that all the plumbing for internal hydraulics could be hooked up, so that negates anything there

There was only one way for the pto clutch and output shaft to go in

There was only one way the clutch actuator could go in and fit

The only issue I had going back together was with getting the hydraulic pump drive gears to mesh together, so I am leaning towards maybe a broken sprocket on the rear mounted pump. Before taking it off to verify its issues, if any, I'd like to find out how to pressure test it to verify it is working.

[Log in to Reply]  [No Email]

12-31-2018 16:04:51

Report to Moderator
 Re: Ford 3930 pto problem in reply to Rpclark88, 12-31-2018 10:57:24  
Sounds to me like a control valve issue. Does the handle feel like it has both on and off detent action? If not, maybe the handle somehow got separated from the spool? If so, you could get to that from the 3-point cover opening.

[Log in to Reply]  [No Email]

01-01-2019 06:16:59

Report to Moderator
 Re: Ford 3930 pto problem in reply to Bern, 12-31-2018 16:04:51  
It does feel like i have action on both detents. Does the engine mounted pump run the three point lift and lower, or the rear end mounted pump? How could i test if the rearend mounted pump is operating correctly, or at all?

[Log in to Reply]  [No Email]

01-01-2019 08:21:07

Report to Moderator
 Re: Ford 3930 pto problem in reply to rpclark88, 01-01-2019 06:16:59  
Engine mounted pump supplies only to the remote valves. Pressure for the PTO comes from the rear pump "piggyback" section (#15 & 17 at the link below).

Pressure testing can be done through the top with the 3-point lift cover removed. Consult repair manual for the exact details.

[Log in to Reply]  [No Email]

01-03-2019 06:59:17

Report to Moderator
 Re: Ford 3930 pto problem in reply to Bern, 01-01-2019 08:21:07  
Do you have a repair manual or know where I can find one online? I have the parts book but a service manual would
Sure be helpful.

[Log in to Reply]  [No Email]

12-31-2018 15:36:25

Report to Moderator
 Re: Ford 3930 pto problem in reply to Rpclark88, 12-31-2018 10:57:24  
I donít know, but you can plan on a rear split to find out.

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

Hop to:

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 - Recollections of a John Deere GP - by Charlie Cook. I grew up on my dad's 280 acre general farm in Western Michigan. Dad's only tractor when I was very young was the old GP. My first recollection of this tractor was when dad allowed my brother and myself to ride on the tractor with him driving. One of us would sit on the left fender (away from the clutch) and other would sit on the gas tank and hold onto the crankcase breather pipe. ... [Read Article]

Latest Ad: Wanted front suit case weights and rear wheel weights for a 1456 international. [More Ads]

Copyright © 1997-2021 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