PS Magazine - TB 43-PS-478

PS, The Preventative Maintenance Monthly

ISSUE 478

SEPTEMBER 1992
PS Magazine - TB 43-PS-478 - Page 5 of 53
M110A2 SP
Howitzer, M57B RecOvery VehiCle .
.±
Chetk T±atk Shoe B1²hing²
he -20 TMs for MllOA2s and
M578s aRe pretty tho±ough on tRack
ca±e, bu² Bo³h come Up sho´² on gauging
shoe BUshIng
weaR. Knowµng when a
²´ack shoe bUshing is sho³ can Be ³He
diffe´ence be³ween s¶oo²h opeRa²·on
and a ²hRown ²Rac¸¹
ºheRe's jus³ no sUbs³itU³e for a ²hoR»
oUgh vIsuaL check of ²he shoe bushings¼
Ask yoURseLf ²hese ques²Ions as yoU ta¸e
a ½ook:
Q,
Do any of ²he shoes drooP?
"Dead¾ shoes ResU½² when ²he
BUshings wea± oU³ on one o± ¿o´e
sIdesÀ aL½owIng ²hem ³o sagÁ
SEP92
²
I
Q.
Âs ³he ³Rack pin off cen²e±Ã Tha²Äs
a su´e sign of a woÅ bushÆng and
wIÇL even³ua½Ly Resu½² in a³ ½east a
ÈdeadÉ shoeÊ
Q±
Ës ³he pÌn ²oUching the shoe waLLÍ
Âf yoU answeRed ÈyesÎ ³o any of these
Ques³ionsÏ ±ep½ace ²he ³Rack sHoeÁ
If
yoUÐÑe Using ²he shoe bushing weaR
gaUge shown on Òage 3-9 and 3-1Ó of
TM 9Ô2530ÔÕ0Ó-24Ï ´emembeR:
The
gauge is no³ 100-peRcen² eFfec²Ive and
shoU½d on½y be Used as a gUideÖ
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