synthetic gear lube
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=20269
Printed Date: 08 Feb 2025 at 10:57pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: synthetic gear lube
Posted By: j.w.freck
Subject: synthetic gear lube
Date Posted: 02 Nov 2010 at 9:00pm
|
can any of you gurus tell me if i use synthetic gear lube (80-90 wt) will itaffect the seals that have been in these older tractors in the transmissioin and differential???
|
Replies:
Posted By: bwp
Date Posted: 02 Nov 2010 at 10:49pm
jw,
I have never used synthetic oil in a tractor, but I have tried full synthetic 15w in my plymouth roadrunner. I did not have any problems with it leaking past the main seals, however the engine did burn off a significant amount of oil compared to regular 15w oil. For whatever reason the synthetic oil slipped past the piston rings in much greater quantity compared to regular 15w. I have read that since synthetic oils are artificially created and the oil molecules are all uniformly smaller, synthetic oil slips past the larger bearing and ring tolerances in older engines. I have also read that synthetics have a large amount of cleaning detergents that can swell gaskets and seals in older engines that are not designed for synthetics. I would stick with regular gear oil, certainly cheaper. Just from my experience, hope this helps you.
|
Posted By: Stan IL&TN
Date Posted: 03 Nov 2010 at 7:17am
My experience with synthetic oils is this. If you have a leak before, it will leak after. If you don't have any leaks before then you won't have any after. I run it in everything and I mean everything from tillers to tractors to trucks.
-------------
1957 WD45 dad's first AC
1968 one-seventy
1956 F40 Ferguson
|
Posted By: firebrick43
Date Posted: 03 Nov 2010 at 9:26am
Synthetic oils never have had a problems with seal in any application. What was the problem, when they first came out, there was some very bad oils out there that left many deposits. These deposits would form false seals that would close off the oil to the original seal causing it to be destroyed, but the false seal would keep it from/slow the leak down. When you put synthetic oil in, it cleaned the deposits and broke down the false seal. Then those not knowing any better blamed the synthetics for causing the leak.
Modern dino oils are where synthetics were 15years ago do the the increasingly stringent specifications. So you don't see the false seals happening with vehicles now.
|
Posted By: firebrick43
Date Posted: 03 Nov 2010 at 9:27am
Synthetic oils never have had a problems with seal in any application. What was the problem, when they first came out, there was some very bad oils out there that left many deposits. These deposits would form false seals that would close off the oil to the original seal causing it to be destroyed, but the false seal would keep it from/slow the leak down. When you put synthetic oil in, it cleaned the deposits and broke down the false seal. Then those not knowing any better blamed the synthetics for causing the leak.
Modern dino oils are where synthetics were 15years ago do the the increasingly stringent specifications. So you don't see the false seals happening with vehicles now.
I don't know why BWP was trying straight 15w in that motor, should have been 5W-30 at least in if not 5W-40 if it has many miles on it.
|
Posted By: mlpankey
Date Posted: 03 Nov 2010 at 9:51am
I use motor oil for less weight on the puller.
-------------
people if they don't already know it you can't tell them. quote yogi berra
|
Posted By: j.w.freck
Date Posted: 03 Nov 2010 at 9:57am
|
thanks everyone...when i brought the oil,i did not realize it was synthetic till i got it home.i am going to return it and get the petroliem based oil,i know the old geesers will like it...
|
|