Does anyone here have a service manual that lists the proper lug-nut torque for the 7700 trucks? I assume it must be a fairly low number, since I tried tightening mine to 125 ft-lbs and snapped off one of the studs. D'oh! That number always worked fine on my older Fords, but would appear to be a bit much for the 7-bolt wheels on the 7700.

I did search around on one of the lug-nuts with a magnifying glass, and found that they have "100 ft-lbs metric class 10" written on them - so I assume that 100 ft-lbs is the proper torque, and that's what I used for the other lug nuts.

Also, has anyone replaced a stud on one of the rear wheels with disc brakes? I'm assuming that I just pull off the caliper, then pull off the rotor (which appears to be held on by the lug nuts), and then on the inside I'll find the drum brake setup used for the e-brake. At this point I assume I'll have room to take out the old stud and put in the new one, though I've never had one of these rear disc/drum systems apart so I'm only guessing. God forbid, I might actually be forced to buy a service manual. I suppose I should just get one of those cheap ones (Chilton, Haynes)...but I'm not sure how well those cover the differences between the 'normal' F150 and the 7700.

Of course, all this is assuming I can find a stud for a 7700 - if this doesn't use the same studs as the other F150s, I'll probably end up having to have a dealer order one.

LK

 

F-150's use 2 different size wheel nuts. The 19 mm nuts, which it sounds like you have, get torqued to 100 lb.ft, the 21 mm nuts are 150 lb.ft.
You've got it figured out about replacing the stud......pull the rotor off and you should be able to get at the stud easily.
As for a shop manual i think that everyone who does any work on their vehicles should own one
A genuine Ford manual is the best by far in my opinion. You can get them on DVD so you can pop it into your computer, find what you want and print it off. You can go to www.flatratetech.com and get one from them. These are the genuine Ford manuals. Most of them cover all lines...cars and trucks, in ranges of years, usually from 1997-2003 or thereabouts. They have wiring diagrams, emissiones diagnosis, TSBs etc on them too.

 

Thanks for the info - I pulled the brakes apart last night, and it went a lot easier than I thought it would. I used my ball-joint press to get the old one out - it worked a lot better than my old method of using a large C-clamp. I know some people who use a hammer and drive them out, but it seems like that would put quite a shock load on the bearings.

I ended up going directly to the Ford dealer to find new wheel studs - none of the chain places had them (or at least they couldn't find them in the computer). They were 73 cents each...not bad at all, thought the dealer would charge me quite a bit more. It does appear that the 7700 uses the same studs as the 'normal' F150s - it just uses more of them.

Anyway, thanks again for the info - and I picked up two extra wheel studs so that the next time I break one off I'll be prepared.

LK

 

Racerguy

I have the factory aluminum FX wheels with the 21mm nuts. I've been torqueing them to 100 ft-pds. I'm afraid to torque any higher with these wheels although the manual says 150. Does this apply to these wheels as well?

Thanks
Pete

 

The Ford manual only specifies the size of wheel stud, not the type of wheel. The aluminum wheels get torqued the same as the steel ones.

 

I guess I'll have to retorque them to 150. I did noticed there is a plastic like washer on the nuts. With 14k miles, my rotors are like new, not a scratch. First truck that way. I'm gun shy, since my previous 4Runner would warp the rotors if you over torque them.

Thanks again
Pete