[DeTomaso] Torque on ZF pan

[Asa Jay Laughton]

So I have the new ring gear bolts installed and safety wire.  My Dad 
used to work on airframes and powerplants for a few different airlines 
so I had him come over and make sure I was doing things in the best 
manner possible.  I also had a copy of Jack DeRyke's last article on the 
subject.  Between the two, I no have the job all done.  Now to put the 
cover back on.

With my trusty electronic copy of the ZF manual, I open to page 27 and 
just get confused.  There are two sets of bolts that need to be 
installed: the long tension bolts and the pan bolts proper.  Paragraph 3 
talks about securing the cover, but doesn't have a torque spec.  In 
paragraph 4, it talks about the tension bolts and lists two specs:

Mt = 1,5 - 1,7 kpm,  Nm = 14,6 - 16,6 kpm

So what does Mt mean versus Nm?  I ask because if I've done my math 
right, it's the difference between 12 ft.lbs and 120 ft.lbs.  I know the 
cover bolts won't withstand 120 without stripping the threads, but the 
tension bolts might.  But then what is the Mt spec?  At 12 ft.lbs it 
would seem that is a good spec for the cover bolts.

Anyone care to un-confuse me?

Thanks,
Asa Jay



Asa Jay Laughton, MSgt, USAFR, Retired

& Shelley Marie
Spokane, WA

1973 Pantera L 5533
[ASASCAT]
    
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