(800) 853-2651
SHOP NOW

Hydraulic pump leak returns on 300

P

Paul 300 U

Member
After noticing that my engine oil was rising
and my hydraulic fluid levels were dropping I
bought a rebuild kit for my hydraulic pump.
At the time, in addition to hydraulic fluid
getting into the engine it was also leaking
out the port where the tach cable inserts
beneath the hydraulic pump.
After the pump rebuild, the leak from the
tach cable stopped and there was no oil
leaking into the engine. Fast forward about a
year and all of a sudden the leak from the
tach cable area has returned with a
vengeance. There does not seem to be any oil
leaking into the engine.
The oil level on the dip stick has remained
steady. Here's my question. Is it possible to
stop the leak coming from the tach cable
area? I've read that a speedy sleeve or two
seals instead together can stop this. Any
feedback on whether this will work and how to
go about fixing it would be appreciated. This
site offers a used pump with a 1 year
guarantee. New pumps are well over $600.00.
If I can fix it is rather go that route.
Thanks in advance for the help! Paul
 
You can (put it at TDC). Mark the timing at the flange where the distributor mounts with a marks a lot. Remove the distributor and drive to access that end. I think 2 thin seals (not stock ones but same ID/OD) will make it seal. Polish the shaft roundy round not along its length. Pack grease gun grease in the space between the seals. Jim
 
Back in the late'70s, or early '80s, Dad was replacing the pump seal on the 300u a couple of times a year for about 2 years. He ended up replacing the pump with a higher output one, and it has never had a problem since (3500 more hours!). I believe the pump was worn, bushings and probably the body and that caused the seals to fail. Mark.
 
Mark thanks for the reply. You may be correct but Jim's suggestion is inexpensive and worth a try. I've read a few different stories and most indicate the pump is probably shot. I've also read that the 2 seal solutions can work because there's not an extreme amount of pressure. I've got zero expertise here. Do you have any details on the more powerful pump? I'm wondering whether it's less expensive because it's possibly a higher production, more generic type of pump. Thanks Paul
 
Well, I am all for not spending money if I don't have to (my Dad tried to save money replacing the seals at first too). And the 2-seal idea is worth trying-the key being to put lube in between them. He bought his pump at the local dealer at the time, and it was just higher volume as I recall; OEM was maybe (?)8gpm and this one is maybe (?)10 or 12gpm. But I have no idea where to get one-probably have to use whatever aftermarket pump you can find. Good luck, Mark.
 
Thanks for the reply Mark. I'm hoping to get started on this today. My first challenge is making sure I don't screw up the timing. My second is to identify the seals you all are taking about. Third is correctly measuring. Thanks again for the feedback. Paul
 
You must log in or register to reply here.

Similar threads

S
300 U loader valve ?
Replies
15
Views
332
Shelbygt
S
W
1955 300 Utility Hydraulic Pump
Replies
4
Views
257
DeltaRed
D
G
Farmall 560 Hydraulic issue
Replies
2
Views
293
Janicholson
Janicholson
W
424 IH needs new hydraulic pump
Replies
8
Views
286
wwoodrow
W
M
1952 Super A Hydraulic pump help
Replies
5
Views
277
BarnyardEngineering
BarnyardEngineering
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.

Copyright © 1997-2024 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

Back
Top