PS Magazine - TB 43-PS-452
PS, The Preventative Maintenance Monthly
ISSUE 452
JULY 1990
M19 Towed HOwiter .
..
MA"*±²³
o much of a good thing can turn
On some wrenches The dogs aRe so
bad Real quick when you use the wheeL
spanner
wrench
f±R
youR
M 198
howItzeR.
What's too much Is The depth of the
"dogs² on the outside edge of The span-
ner,
NSn
5³20´0³´048´06µ³¶
tall that· InsTead of tu¸ing just The
machIne thread plug· they aLso Tu¹ the
Key washeº ThaT holds the axle bearing
In place»
¼hat sTRIps the washer Tab that Lines
up wIth the spIndLe sloT½ When That
happens,
The
washer
and
beaRIng
loosen¾ eventuaLLy ºuinIng The bearing¶
You won¿t Ànow abouT the sTripped tab
until the bearing goes badÁ whIch
too late¶
\
f
¼urn The 7´inch outsIde diameter
to 63/´inches· abouT Ã/ÄÅInch FRom the
woRÆIng edge »
ÇÈ
Éug
heIght
should
be
0.ÊË0Ì
0.ÊÍ0´inch as measured ÎÏom the inside
base of The lug. Machine any lugs that
aºe TalLer Than 0.ÊÍ0´inchÐ ¼he lug face
angle should remain at
4
degrees
+
I
degree½
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