(800) 853-2651
SHOP NOW

Torquing Lubricant

J

jimdog

Member
What is the preferred oil or lubricant to use on bolts and nuts for a torquing lubricant? Rod bolts are TTY bolts.
 
Sometimes the book will state dry or lubed torque specs. When not stated,I just use a drop or two of motor oil.BTW,What does "TTY" stand for?
 
I suspect TTY is "torque to yield."

As the character "Tigger" in the Winnie the Pooh animated films would say...............TTFN................Ta Ta For Now!
 
There is none I know of. Some detailed tech manuals give different torque specs with different thread-lubes. Less detailed ones just say "oiled." I have many repair manuals from the early 1900s that show a table of torque specs and they differ with "dry clean threads", "dirty dry threads" "clean threads with kerosene", "clean threads with 30W motor oil", "clean threads with anti-seize compound", etc. Things got dumbed down as time went on. Torque-to-yield eliminated some of those variables.
 
When I worked on Detroit Diesel Engines, we we issued a can of thread
lubricant that was about the consistency of creamy peanut butter.
Now days, I just use a little gun grease.
TTY bolts are for one use only.
 

During a recent engine build I tried ARP thread lube and found it to be a very good lubricant, torque wrench pull was smooth all the way up to full torque.
With other lubes (motor oil) it would get a little jerky before full torque.

Some torque to yield bolts are designed to be reused, 5.9 Cummins is one, there's a bolt stretch gauge one uses to determine if the head bolt is reusable.
 
(quoted from post at 11:25:57 11/30/17) how do you know when your at the yield strength of the bolt??
Click to expand...

You take it up until it snaps off, then back off one quarter turn. That's usually how it works around here, at least.
 
The new improved ARP thread lube is the weapon of choice. The old ARP Thread lube was not much more than Moly Lube. So, short of the new improved ARP stuff, the Moly Lube is a good runner up.
 
(quoted from post at 11:25:57 11/30/17) how do you know when your at the yield strength of the bolt??
Click to expand...



If you never done a TTY bolt, lets say its a head bolt. First step torque the bolts to lets say 70 ft-lbs, then you need a angle gauge to put between the socket, and your breaker bar. Then lets say the head bolts needs to be turned 90 degrees, so using the angle gauge you turn each bolt 90 degrees, then you may have to turn them all again another 90 degrees, do that then you are done.
 

First time I worked on a engine with TTY bolts was a 3208 Cat diesel.
Reading the torque specs it called for torquing the main bolts to 30 lbs, and I was like :? what? Then it said to turn the bolt an additional 120 degrees, rod bolts torqued 30 lbs plus 60 degrees.
When we got to the heads they torqued 115 lbs straight up :eek: .

5.9 Cummins rod and mains torque straight lbs, head bolts are torque plus 90 degrees.

The bolts are reusable on both of those engines providing they are within length spec.
 
I talk to a IH service Mgr.about reusing the TTY.rod bolts.He said he would reuse them once.I believe this motor has been overhauled once,did they use new bolts,I'm not
sure.I see some have said you can measure the length of the bolt to determine if it can be reused. These bolt MFG.are proud of there bolts and nuts.New rod bolts for my
358 German would cost between four and five hundred dollars.
 
You must log in or register to reply here.

Similar threads

J
Head gasket Replacement Jubilee 134 CDI
Replies
2
Views
165
Jim.ME
J
A
head bolt lube
Replies
5
Views
489
andydap
A
J
2540 ih
Replies
2
Views
204
showcrop
showcrop
Btzj02
Corrosion control after cleaning
Replies
9
Views
266
Btzj02
Btzj02
P
Advice on 3 pt pallet fork
Replies
3
Views
341
old-9
O
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