WHrAT'D;HESAy M172A1 TRAILER WHEELS...
7-V BACK THERE_?


 HERE'S tvHAT'S NEEDED.


 How's that? Try it slower.
 N-u-t-s s-o-m-e
 b-e-t-t-e-r
 b-u-t...
 Yeah, those new wheel nuts and studs
on your M172A1 25-ton lowboy trailer ]
are a lot better. Your trailer got 'em 11
either under MWO 9-2330-211-30/3 .
(Jun 66) or in production.
 They hold tighter'n the old setup.
 But, just about anything you tighten can loosen-all by itself. Gine those
nuts long enough, forget to check 'em once in a while and you ma. find your
trailer draggin' 'er tail behind 'er-leaving your wheels strung back along the
road.
 So hit those outer heel nuts real
 often. Your tractor's OEM lug wrench
 ("stretched" like it sa)s in PS 1"5) will
 do fine for checking and on-the-road
 tightening. Put plenty of muscle to it -
 with that 30-inch handle, .ou won't
 have to worry about over-torquing the
 nut.
 SBe sure your mechanic follows up on
 any loose ones you find. You snug 'em
 down good with your lug wrench, but
 get him to give 'em the full treatment
 with his torque wrench-450 to 500
 LEAN INTO IT!. lb-ft.
 66


ITERBUT






 As )ou were! It's not quite that simple.
 Loose outer a heel nuts could mean loose inner wheel nuts too. To do the job
 right, .our mechanic should take the outer heel off, check the inner nuts (300
 to 350 lb-ft) and remount the outer heel- ith the trailerweightoff thewheel
 while tightenin' the nuts back up, natch.
 Those jam nuts on the inner ends of the studs won't likely loosen up. But they
 should be checked rcg'lar too- like h hen brake drums are pulled for semian-
 nual inspection and sen ice. An. loose ones get the full torque--175-200 lb-ft.
 INNER WHEEL OUTER WHEEL
 BRAKEDRUM HUB



 SPACER- DON'T















 Whenever wheels are pulled is the time to look those studs over real close-
 for cracks and stripped or burred threads. Replace bum studs. Find a broken
 stud? Then get suspicious of the studs on either side-strain might have dam-
 aged them too.
 What separates pro's from greenies is the way they install wheel nuts. So
 make sure nuts are centered in the wheel's ball seats. Then stagger-tighten 'em

 Here's totightwheelnuts!
 67
 BRKERU (RH TD HEX (R H *

















 67