Bolts

[56wrench]

Hardened steel flatwashers under bolt heads work good when properly torqued. That was the only method Cat used for many years with some special exemptions. Anyone remember the castellated(slotted) nuts with the special cotter pins used on con-rod nuts on some of the old cat engines?

 

[mekanik]

I remember split lock washers that the ends were slightly thicker on opposing sides so they would bite into the bolt head and the metal below the washer. I always thought that was not a good idea as it could cause a crack to start at the bolt hole or damage the radius between the bolt shank and bolt head causing the bolt head to break off.

 

[92U 3406]

Hardened steel flatwashers under bolt heads work good when properly torqued. That was the only method Cat used for many years with some special exemptions. Anyone remember the castellated(slotted) nuts with the special cotter pins used on con-rod nuts on some of the old cat engines?

Definitely rings a bell. Not sure I've ever seen it in person.

 

[92U 3406]

Doing shovel work a guy gets good at putting lockwire on bolts. There's definitely an art to it.

 

[Coaldust]

Last day of the year, drinking coffee and talkin’ bout lock washers with my mechanic bro’s. I love it. You guys are awesome.

 

[Diesel Dave]

The only reason I disliked doing undercarriage - all that buffing and cleaning of paint and rust.

Skipping or doing a poor job of this critical step will bite you quick !!

 

[92U 3406]

Skipping or doing a poor job of this critical step will bite you quick !!

I used to hook up new track chains to the forklift and make a few laps of the yard. Cut the prep time on that in half lol.

 

[joe--h]

Anyone remember the castellated(slotted) nuts with the special cotter pins used on con-rod nuts on some of the old cat engines?

Picked lots of pieces of cotterpins out of the oil pump screen on old Jag engines. Supposedly hitting the oil in the sump causes them to break.

Joe H

 

[Truck Shop]

Where's the discussion on 3 in 1 sewing machine oil?

Last day of the year, drinking coffee and talkin’ bout lock washers with my mechanic bro’s. I love it. You guys are awesome.

 

[Coaldust]

Should we save the three in one discussion for this time next year? We still have a lot of washer stuff to talk about. For example, nobody has mentioned that hardened flat washers have a head side and a work piece side. We totally skipped that.

 

[mekanik]

Yes and remember the stamped sheet metal lock nuts that went on the rod and main bearing studs after the nuts were torqued?
I only ever saw one engine with them it was a 50's vintage Case gas engine in a Baker Hi Lift loader. One of the older guys I worked with was an engine machinist in the 50's and said they were common.

 

[Truck Shop]

Should we save the three in one discussion for this time next year? We still have a lot of washer stuff to talk about. For example, nobody has mentioned that hardened flat washers have a head side and a work piece side. We totally skipped that.

Oh My--1/4 flat for 5/16 bolts, 5/16 flat for 3/8 bolts and so on.

 

[92U 3406]

 

[Tyler d4c]

Oh My--1/4 flat for 5/16 bolts, 5/16 flat for 3/8 bolts and so on.
The truth is out but I yet to find a proper fitting flat washer for a 1/4

 

[Pony]

Should we save the three in one discussion for this time next year? We still have a lot of washer stuff to talk about. For example, nobody has mentioned that hardened flat washers have a head side and a work piece side. We totally skipped that.

Which side is WhICh?
The hardened washers I use have a stamp on one side, just cause I'm ocd I always put that side towards the nut.
Didn't know there was a right or wrong side.
Did I fluke it the right way?

 

[Coaldust]

The crown goes towards the head.

 

[Coaldust]

 

[Truck Shop]

Then there are rolled threads.

 

[Coaldust]

And thread classes, but we haven’t finished washers yet.

 

[JPV]

I have learned the hard way about re-using bolts on suspension components, especially Kenworth 8 bag sway bar bolts. When those break and the axle walks all over and you are laying under a loaded truck probably on a hill trying to get things back in position it tends to stick with you. It happened a couple times before I figured it out. New bolts properly torqued, no problems ever.