Tech question on steering box rebuild (1 Viewer)

[CenTXFJ60]

the FSM calls for a 83 foot pound torque on the end cover. I'm at 65 right now and am concerned the bolts may break. They feel like they are stretching. Should I be concerned or go all the way to 83 ft-lb. and I may be missing it, but the book does not cover the torque spec for the top plate on the worm gear. I assume it's the same.

 

[Output Shaft]

83 ft.lbs is an insane amount of clamping force, but I have to say that I've never broken a Toyota bolt when torquing it to the FSM spec (whatever that's worth) and I've removed and retorquing just about all of them.

 

[CenTXFJ60]

83 ft.lbs is an insane amount of clamping force, but I have to say that I've never broken a Toyota bolt when torquing it to the FSM spec (whatever that's worth) and I've removed and retorquing just about all of them.

I agree on the amount of torque. These bolts are half the size of the knuckle bolts with roughly the same torque spec. I'm leaving them at 65 and will check for leaks. Can always increase the torque.

 

[cruiserpilot]

Re-Read your book. You are getting your specs for non-powersteering steering gear box.
I've got my 40/60 series FSM, and I get 29-39 ft/lbs for mine.

Go to the rear SST and Service Specifications of your FSM and double check. I'd say those numbers are
not applicable for power steering gear box. They seem too high to me. If I'm wrong, that's ok.
But I'm a firm believer in not over torqueing.

 

[CenTXFJ60]

Re-Read your book. You are getting your specs for non-powersteering steering gear box.
I've got my 40/60 series FSM, and I get 29-39 ft/lbs for mine.

Go to the rear SST and Service Specifications of your FSM and double check. I'd say those numbers are
not applicable for power steering gear box. They seem too high to me. If I'm wrong, that's ok.
But I'm a firm believer in not over torqueing.

You are absolutely correct. Really glad I stopped where I did. Thanks for the feedback

 

[Output Shaft]

@cruiserpilot to the rescue! Nice catch.

@CenTXFJ60 if you've already torqued them to 65ft lbs, they should be discarded & replaced. The torque spec is 34!

There is a good chance they will shear off the next time they are attempted to be loosened years from now and are stuck. Remove them now while you still have a chance (easier to loosen).

Over torquing a bolt 2X beyond its rated capacity is an almost guaranteed invitation to breaking it next time or failing in service.
That would be like torquing the lug nuts to 200 ft lb.

I know that the ubiquitous 8mm bolts that are found all around the cruiser are rated to 10-12 ft lbs max. I once set up with my torque wrench too tight and had it set to 18 and it sheared the bolt.

 

[CenTXFJ60]

@cruiserpilot to the rescue! Nice catch.

@CenTXFJ60 if you've already torqued them to 65ft lbs, they should be discarded & replaced. The torque spec is 34!

There is a good chance they will shear off the next time they are attempted to be loosened years from now and are stuck. Remove them now while you still have a chance (easier to loosen).

Over torquing a bolt 2X beyond its rated capacity is an almost guaranteed invitation to breaking it next time or failing in service.
That would be like torquing the lug nuts to 200 ft lb.

I know that the ubiquitous 8mm bolts that are found all around the cruiser are rated to 10-12 ft lbs max. I once set up with my torque wrench too tight and had it set to 18 and it sheared the bolt.

View attachment 1400848

Ok. So do I just loosen them or actually replace them. Appreciate the feedback

 

[CenTXFJ60]

And for those that feel the way I do (even though it's my fault on the misread), why would the FSM not have a power steering box in it. Aren't almost 100% of 60's in the USA power steering?

 

[Output Shaft]

The power steering gearbox rebuild instructions are farther in the manual. That page above was SR68.

Replace the bolts that got over torqued.
Toyota still sells them.
PN:
90119-10070

 

[cruiserpilot]

And for those that feel the way I do (even though it's my fault on the misread), why would the FSM not have a power steering box in it. Aren't almost 100% of 60's in the USA power steering?

No, the early 1980's were manual, I am not too sure on the cross over years, I think 1983/4
I just went through the whole rebuilding of steering gear box for my BJ74 using a LHD 1985 BJ70
steering gear box. (LHD conversion) It did get a bit complicated making sure I got the correct seal kit, and I did replace
the bearings as well. It was a complete job, and I had a professional help me. I was too intimidated and
my truck needed a gov't inspection to boot, so I had to have it perfect.

Those are regular bolts, from anywhere on a landcruiser so I would replace them with other bolts that
have not been over torqued.

 

[CenTXFJ60]

Good call out guys. I have a whole box of cruiser bolts and another steering box I can rob for now. I'm really kicking myself for being such a dip wad and not recognizing the manual vs. PS in the book. Thanks again

 

[cruiserpilot]

Good call out guys. I have a whole box of cruiser bolts and another steering box I can rob for now. I'm really kicking myself for being such a dip wad and not recognizing the manual vs. PS in the book. Thanks again

I only realized I was in the wrong section when I noticed no hydraulic ports for the PS hoses. Don't beat yourself up.
Glad it got rectified, very cool. J

 

[CenTXFJ60]

Even had a bag of new bolts from when I did a T-case rebuild. Torque set in just fine. Really does not seem too tight (34 pounds) but I understand the O-rings have to do their job. Really appreciate the expert suggestions/feedback. This is the only way I can assure I get things right.

 

[CaptClose]

Looks good man!