PS Magazine - TB 43-PS-448
PS, The Preventative Maintenance Monthly
ISSUE 448
MARCH 1990
ORNTto
PIN.
THt iS ±hE
QUe5²³´ Wfµn ¶·¸
¹ACºOM»¼½R G o
¾¿ >r cÀÁ
he answer depends on the kind of crane you're oPraTing, and which TaCh is
bad. ±rane systems
a
mAde up of two paRTs² ³he cARRieR And The cRaNe (³he
Upper portion)´ µhey can
b
powered by one engine¶ or Two SepAraTe engines·
ÂF
The crane sysTem hAs only one engine and one engiNe tachomete¸¹ it mUsT
have a functionIng tach to
b
fully oPrationAlº »f The tach won¼T worK½ the crAne
sysTem is ¾M±·
»f ¿he carrier and The crane haVe separaTe engines² The crane ÀupPr por¿ionÁ
mUsT have a Tach thaT worksÂ
a
bum c¸ane tach means iT's ¾M±·
µhe carrie¸ can sTill be operated as long as you donÃt need The craneÄ Åhe
exceptions To ¿his ¸ule are the M320µ aÆd the MÇ20Å2 cAÈRie¸SÉ Åhey hÊVe
STandard shift transmiSsËons² and are ¾M± Ìf The Tach iS badÍ
Be sure to get a Tach on order To replAce a bad oneÎ
Ã
mÄÅ9
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