Quote:
Originally Posted by john charlton
Just wondered what the torque should be put on an AA truck axle nut,way more than 125 ft/lbs I think .
John in Suffolk County England .
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7/8-14 castle (A21941) which according to the chart referenced above (I still have a tab open on my computer) is...
7/8 Fine: Grade 5 = 355ftlbs - Grade 8 = 501ftlbs
I myself remember taking off the rear wheels of an AA basketcase which I brought home. My Harbor Freight "Earthquake" 750ftlb capability 1/2 drive impact wrench would not do it. It took borrowing a 3/4 drive impact from work. (So much for "Earthquake." Maybe that only a "strong tremor" in real life?)
A rear wheel puller from work was also necessary - and a 4 pound "mini-sledge hammer." Also the gas-hammer - and some tempsticks (not to go above 400F.)
That AA was "interesting." Found under a barn here in Cow Hampshire it was seriously degraded due to a generation of dis-use. However, in it's day, that truck was heavily used, and heavily maintained. The engine date code dated the truck to February 1930 (i.e. Borg Warner 4 speed and upgraded undercarriage) but the brake drums were cast iron - which was the 1931 Model AA-Model BB "transitional" drum. (told by a "square" cast into the edge of the drum flange.)
The frame of that truck also had been "rendered" (imagine the loading!) but repaired with 3/4" thick "sister plates" and done up VERY nicely. If I didn't already have an AA truck chassis with only 26K original miles, I would have kept it.
Someone put some serious money into that truck during it's life.
Joe K