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Care required using gas axe

Truck Shop

Truck Shop

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Joined
Dec 7, 2015
Messages
16,989
Location
WWW.
The first thing when heating u-joints is to remove the zerks and stand to the side. Also the use of heat temp paint stick helps prevent over heating of parts.
But the other killer that is not mentioned in this thread is the improper use of a press. When pressing bearings a scatter shield is a must-no if's, and's, or but's about it.
Think of it this way-a 1/2" ball bearing is a 50 caliber round and can go through three walls at the blink of a eye. I was in a auto parts/machine shop store years ago
buying some brake shoes for my pickup when an incident like this happened. The ball bearing just missed the sectaries head in her office after it already had passed
through two walls one being the restroom. The ball was finally stopped by a 2 X 4 stud in the wall of her office. No joke presses are deadly as hell.

Truck Shop
 
DMiller

DMiller

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Joined
Feb 21, 2010
Messages
16,575
Location
Hermann, Missouri
Occupation
Cheap "old" Geezer
Have run presses most of my adult life, ALWAYS some form of shield on the press or the materials being pressed. Actually saw a Hendrickson beam fail installing bronze bushing, the kid doing it THOUGHT or failed to that the beam would square up as it was shoved in. Chunk the size of a average dirt clod scattered across the shop.
 
92U 3406

92U 3406

Senior Member
Joined
Jan 3, 2017
Messages
3,160
Location
Western Canuckistan
Occupation
Wrench Bender
Truck Shop said:
The first thing when heating u-joints is to remove the zerks and stand to the side. Also the use of heat temp paint stick helps prevent over heating of parts.
But the other killer that is not mentioned in this thread is the improper use of a press. When pressing bearings a scatter shield is a must-no if's, and's, or but's about it.
Think of it this way-a 1/2" ball bearing is a 50 caliber round and can go through three walls at the blink of a eye. I was in a auto parts/machine shop store years ago
buying some brake shoes for my pickup when an incident like this happened. The ball bearing just missed the sectaries head in her office after it already had passed
through two walls one being the restroom. The ball was finally stopped by a 2 X 4 stud in the wall of her office. No joke presses are deadly as hell.

Truck Shop
Click to expand...
 
S

sandy

Well-Known Member
Joined
Aug 16, 2007
Messages
65
Location
Australia
Occupation
diesel mechanic
Had one a couple of weeks ago
in field repair
Dana front axle on deere tractor
tie rod had snapped off at the joint., ball seized in with rust
heating up as locktighted threads in end of joint where screws into steering ram
noticed one side off joint starting to swell, stepped back
joint swelled some more then blew a small hole in the side
and a fine jet of flame approx two foot long shot out.
made a loud bang and had to sit down awhile
is fairly common to have to heat the end to burn the locktight to get them off
usually the joint is worn and sloppy and you do get a bit of smoke
I think in this case as the joint was seized with rust pressure built up at the back
until it blew a hole through the side
 
J

jeff112

Well-Known Member
Joined
Jan 12, 2011
Messages
97
Location
michigan
Another area that is often heated to free a component, Would include a brake caliper bracket slider pin. That often tends to rust and stick. I have over heated per say in attempt to free stuck pin to have experience the separation occur in a split second! Like a rocket!!!
 
Nige

Nige

Senior Member
Joined
Jun 22, 2011
Messages
29,368
Location
G..G..G..Granville.........!! Fetch your cloth.
sandy said:
Had one a couple of weeks ago
in field repair
Dana front axle on deere tractor
tie rod had snapped off at the joint., ball seized in with rust
heating up as locktighted threads in end of joint where screws into steering ram
noticed one side off joint starting to swell, stepped back
joint swelled some more then blew a small hole in the side
and a fine jet of flame approx two foot long shot out.
made a loud bang and had to sit down awhile
is fairly common to have to heat the end to burn the locktight to get them off
usually the joint is worn and sloppy and you do get a bit of smoke
I think in this case as the joint was seized with rust pressure built up at the back
until it blew a hole through the side
Click to expand...
I suspect that is also what happened to the joint that was the start of this thread. That was also a Dana axle. I’ll be honest WTF was my first thought when I saw the joint after it let go. Like you I always imagined that a worn one could not seal sufficiently to build up pressure in that way.
 
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