Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

Hydra-Power Questions
:

Several

Welcome Guest, Log in or Register
Author 
Myron KY

09-06-2002 07:13:34




Report to Moderator

Hi All! I have a '67 1850 diesel with Hydra-Power Drive that I purchased this spring. This is my first Oliver and I have a few questions about the Hydra-Power.
First, a newbie question. I get a nice smooth down shift when going from Direct to Under drive. From Under to Direct a sharp upshift that will jerk you back in the seat at times. Is this pretty much normal?

Next, when I take off in Direct (usually up hill) I feel a shutter in the drive train. If I switch to under drive it goes away. When I get to the top of the hill I switch to Direct and it's fine. The Hydra Drive is full of fluid but it has a burnt smell. I'm using Quaker State Dextron/Mercon III. Is this the correct fluid? Is the fluid just getting too hot? Maybe low oil pressure to the clutch? Or, my worst fear, the clutch is slipping and burning?

Next question. Is the Hydra-Power oil pump driven via the long PTO shaft so that it pumps whenever the engine is running or via the Hydra-Power's input shaft so that it pumps only when the input shaft is turning?
If via the input shaft, when the main clutch is engaged the tractor starts in Under drive then shifts automatically to direct when the oil pressure is high enough to activate the Direct drive clutch? (This is assuming the Hydra-Power is in Direct of course.)

Sorry for so many questions. Just trying to learn. Myron KY

[Log in to Reply]   [No Email]
Sam M

09-11-2002 11:18:06




Report to Moderator
 Re: Hydra-Power Questions - Several in reply to Myron KY, 09-06-2002 07:13:34  
On the hot hydrdrive fluid , on this model Oliver I believe the hydradrive has a small cooler on top of the hydradrive with water lines coming back from the radiator to the cooler . At least my 1850 which is about the same manufacture year is set up that way . You may want clean out the hoses that bring the water back to the cooler or replace them . Heater hose works well to replace them . Also you may have a weak water pump which is not circulating the water .

[Log in to Reply]  [No Email]
Bob

09-09-2002 17:19:28




Report to Moderator
 Re: Hydra-Power Questions - Several in reply to Myron KY, 09-06-2002 07:13:34  
The jerk is a sign of a good Hydra-power. But when ever possible don't shift the hydra-power when the engine is running above 1500 rpm's. By doing this it will last longer with fewer repairs.
The shutter could possibly be the coupling chain, shutter may be do to worn sprockets or chain. Try putting a little oil on the chain.



[Log in to Reply]  [No Email]
B A Star

09-06-2002 21:36:41




Report to Moderator
 Re: Hydra-Power Questions - Several in reply to Myron KY, 09-06-2002 07:13:34  
The pump is driven off of the output shaft. If you want to prove it. Park your tractor headed down hill in direct drive with the transmission in gear, shut off the engine and see what happens. It will start to roll when the direct drive clutch leaks off, as it rolls, the pump is driven by the transmission input shaft and builds pressure and the tractor will stop for a little while and the cycle will start over. Shift characteristics, when up shifting the smoother the shift the longer time the clutch is slipping, thus shorter clutch life. For longer clutch life you want somewhat of a harsh shift, remember it is picking up speed and load. When shift down from the clutch is off loading and some slipping occurs here also, however the load is being reduced. Current tractors with computer technology can adjust for the load when making a shift. The load can be sensed by the computer either by the turbo boost or the electronic injection pump fuel delivery position. Light load, engage the oncoming clutch for a long peroid of time for a smooth shift, however in the field under heavy load you want a rapid engagement to reduce clutch wear. It is all done electronically. My truck has a tow/haul shift on the shift lever, engage that and make a shift at full throttle and it shifts very harsh, some deal as the current tractors.

[Log in to Reply]  [No Email]
Bill

09-06-2002 19:19:36




Report to Moderator
 Re: Hydra-Power Questions - Several in reply to Myron KY, 09-06-2002 07:13:34  
Maybe you need to change your hydra power oil filter.



[Log in to Reply]  [No Email]
tubba_JD420C_ny

09-06-2002 18:31:57




Report to Moderator
 Re: Hydra-Power Questions - Several in reply to Myron KY, 09-06-2002 07:13:34  
My White 2-85 that I had one time did that, too, with the jerk and the shudder. Seems to be normal. Don't forget that it free-wheels in Under-drive, otherwise might give you a nasty surprise going down a hill with a loaded hay wagon )or two).
good luck



[Log in to Reply]  [No Email]
Myron KY

09-06-2002 17:42:32




Report to Moderator
 Re: Hydra-Power Questions - Several in reply to Myron KY, 09-06-2002 07:13:34  
Thanks Fellas,
It's good to hear the upshift and shudder are normal. I'll check those cooler lines.
Thanks again,
Myron KY



[Log in to Reply]  [No Email]
Farmer Tom

09-06-2002 13:30:46




Report to Moderator
 Re: Hydra-Power Questions - Several in reply to Myron KY, 09-06-2002 07:13:34  
I agree with Larry about the upshift jerk. My 1850 does it also. I can tell you, I really do like the up/down shift feature real well!



[Log in to Reply]  [No Email]
Larry from Maryland

09-06-2002 09:07:39




Report to Moderator
 Re: Hydra-Power Questions - Several in reply to Myron KY, 09-06-2002 07:13:34  
Yes the upshift jerk is normal.The oil pump is driven from the imput shaft of the transmission.Some of the ones I have do have the shudder you feel when taking off in direct.The hydro-powers that are real tight inside and don't let the preasure leak out fast will hold the transmission in direct.On those tractors you only feel that once when you first start out.The one tractor like that i have been driveing for 25 years and have done no repairs.Your fluid should work fine ,but if its hot enough to smell burnt then maybe its not getting cooled by the oil cooler.Check for plugged oil or water lines.The oil cooler sits ontop of unit.

[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


Copyright © 1997-2023 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