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Tightening the pinion nut.

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28K views 17 replies 13 participants last post by  senatorfrisky  
#1 ·
In an extra nice article in the tech part of this website ( http://www.pirate4x4.com/articles/tech/billavista/Gear_Setup) it is explained how to set gears. I am going to perform a job on a CRD60 and I have only one question. In title “Installation and Setting Pinion-bearing Preload” where it says in point 11 by picture ol to hold the yoke, torque pinion nut to 255 ft-lbs. Do not simply hammer the nut on with an impact wrench, as the torque on the nut has a direct effect on pinion-bearing preload”, what tool is the writer referring to? I guess it must be some sort of do it yourself tool, but considering the torque I will apply, I must find a way to hold it firmly. Any suggestion?
 
#2 · (Edited)
the only way ive ever seen it does is with an impact, but always lean ot the cautious side........ your best off to measure your rotating torque (inch pounds) b4 dissasembly, then as you use the impact you hit it down, check your turning torque until you get in within an in. lb of the previous setting...... or you could play with your gun settings/ air pressure and use a torque wrench to dial your gun in to 255ft lbs on a different nut/bolt set in the vice.....
 
#6 ·
vetteboy79 said:
I use a really friggin big pipe wrench around the yoke to hold it, and a torque wrench on the nut.
x3, Easier in the vehicle than in a stand IMO. I just locked the pipe wrench against the ground while on the yoke and the weight of the rig keeps it from moving leaving me to slowly tighten the pinion nut.

When I built the 60 in the stand I had to have somebody else hold the pipe wrench while I turned the pinion nut, more involved me thinks.
 
#8 ·
vetteboy79 said:
I use a really friggin big pipe wrench around the yoke to hold it, and a torque wrench on the nut.
x4, but since I don't EVER work with pipe and I've used the "pipe" wrench a dozen or so times for yoke removal/installation, I think I can safely call it a yoke wrench. :D

Only trouble with this method is that the pipe wrench should be hanging somewhat below the yoke and when no torque is applied, the wrench will simply fall off. So you gotta hold the YOKE wrench with one hand, put pressure on the torque wrench, and then you can switch both hands to the torque wrench when required.
 
#10 ·
I really thank you guys for all the suggestions. OF course I have a dial torque wrench LB inch for the rotation, and I have a 600 LB foot for the pinion nut. I will not use any impact. So I will check out Summit, otherwise I will try to build the tool you guys are talking about. DO you have a picture by any chance? It would really helm me to understand better what it looks like. Thank you very much anyway. I will start the "surgery" on my CRD60 soon and let you know how it goes....
 
#15 · (Edited)
I used a scrap piece of 24" long 4" C-channel with a hole in the center for the socket and 4 bolt holes that matched up with the yoke. Bolt it to the yoke and go to town. If it is still in the vehicle and it won't touch the ground to prevent the yoke from turning, use a jackstand to prop the other end up to prevent it from turning. Out of the vehicle a hold it with your foot or a piece of chain around the axle.
 
#18 ·
BryanS said:
x4, but since I don't EVER work with pipe and I've used the "pipe" wrench a dozen or so times for yoke removal/installation, I think I can safely call it a yoke wrench. :D

Only trouble with this method is that the pipe wrench should be hanging somewhat below the yoke and when no torque is applied, the wrench will simply fall off. So you gotta hold the YOKE wrench with one hand, put pressure on the torque wrench, and then you can switch both hands to the torque wrench when required.

seconded. pipe "yoke" wrench... get someone else to help cuz that pipe wrench falling off will make you want to throw a pipe wrench. not the safest tool to chuck across the shop :laughing: