Yesterday's Tractor Co.
Shop Now View Cart
   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
Tractor Town
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
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life
Ford 9N, 2N & 8N Discussion Forum
Show Parts for Model:

Re: No Hydraulic Action

[Show Entire Topic]  

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

08-09-2014 04:47:56

Report to Moderator

Tall T said: (quoted from post at 17:06:00 08/08/14) "Your gauge is showing 2-3 inches of mercury - 1-1.5 PSI. That isn't anywhere close to being a problem."

Oh, I get it now . . . I think.

The guage only indicates the restriction of oil flow

through the filtering medium. As the filtering medium becomes more and more saturated, the psi increases to the red zone. but even if the vacuum pressure on the guage is in the red, indicating a saturated filter, oil flow is not proportionally restricted to the pump as the oil then simply bypasses the loaded filter on the way to the pump.

What is the input oil pressure at the vane pump?



No - I'm afraid you don''t got it now.
  1. Oil is being sucked in by the pump and input oil pressure at the pump inlet is NEGATIVE with respect to air pressure.
  2. If properly installed (i.e placed between outlet port on the filter and pump) that gauge is showing you the VACUUM at the inlet port on the pump.
  3. If improperly installed (e.g. placed between the inlet on the filter and the reservoir) it is showing you the VACUUM on the inlet to the filter which will be lower than on the pump - much, much lower if the filter is clogged and there is no bypass in the head.
  4. IF your filter head has a bypass in it and the oil is not overly thick the inlet vacuum on the pump will never be greater then the bypass pressure.
Sounds like you don't have a good handle on what exactly you have and I'd suggest you correct that by replacing both the head and the filter with KNOWN commodities. Cost for a Zinga 3 PSI bypass head and a 100 mesh (140u) strainer is about $50 bucks.

This post was edited by TheOldHokie at 04:52:01 08/09/14.

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

Hop to:

Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]

Home  |  Forums

Copyright © 1997-2016 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