Atlas Copco CC 250, Руководство по эксплуатации

Страница: 31 / 40

31
8.2.5. Checking for wear
Wee k l y ( e v e ry 50 wo rk ing hou rs app r o x.) c he ck t he
wea r on t he cr u s hing s u rf a c e s o f t he jaw s. Bild t hem
up i f ne c e ss a ry b y mean s o f ha r d s u rf a c ing . U s e
s ui t able ele ctr ode s s u c h a s:
ESAB
OK 83 . 30 D I N 8555 − E1 − 300
OK 83 . 50 D I N 8555 − E6 − 55
ode r
S I E V− FR O
B − 500
B − 600
o r s imila r.
Be f o r e welding , r emo v e all pain t r e s idue , s in c e t hi s
c an c on v e rt in t o poi s onou s ga s e s on bu r ning .
P r e − hea t t he s u rf a c e on whi c h t he weld depo s i t i s t o
be made t o a t empe r a t u r e o f 150 − 200 º C . A ft e r
ha r d −s u rf a c ing , c ool s lowl y in ambien t t empe r a t u r e .
(s ee Fig . 31 )
Fig . 31
8.2.6. Checking the hydraulic lines before starting work
Ca rry ou t a v i s ual c he ck on all line s ( pipe s and
ho s e s) fr om t he pump t o t he Combi c u tt e r and ba ck
t o t he t an k. Tigh t en an y loo s e scr ew c oupling s and
ho s e c lamp s. Damaged pipe s/ ho s e s mu st be
r epla c ed .
8.2.7. Checking the adapter bolts for wear
Thi s v i s ual c he ck i s onl y po ss ible when t he Combi
c u tt e r ha s been di s moun t ed fr om t he e xc a v a t o r. If
e xc e ss i v e wea r i s de t e ct ed (cr a cks, no tc he s,
no t i c eable inden t a t ion s e tc.) t he scr ew s mu st be
r epla c ed .
8.2.8. Checking and cleaning the hydraulic oil filter
I n t he r e t u r n line o f t he h y d r auli c syst em t he r e mu st
be in st alled an oil f il t e r. Thi s f il t e r, wi t h a me s h wid t h
no t e xc eeding 50 mi cr ome t e rs, mu st be f i tt ed wi t h a
magne t i c s epa r a t o r and c hanged a t r egula r in t e rv al s.
O n a new Combi c u tt e r t he oil f il t e r s hould be
c hanged a ft e r t he f i rst 50 ope r a t ing hou rs and
t he r ea ft e r 500 ope r a t ing hou rs mu st be c on tr olled
and r epla c ed a s ne c e ss a ry.
8.2.9. Checking screw couplings
U s e a t o r que w r en c h t o c he ck t ha t t he bol ts whi c h
hold t he c u tt e rs a r e p r ope r l y t igh t ened (s ee t able in
s e ct ion 8 . 3 . ) The bol ts c an be t igh t ened onl y on c e
a ft e r t he f i rst a ss embl y. A ft e r t ha t t he y mu st be
r epla c ed . The c u tt e rs a r e t u r nable .
A ft e r t he f i rst 10 hou rs o f ope r a t ion , t he t o r que o f t he
t h r u st− bea r ing bol ts mu st be c he ck ed (s ee t able in
s e ct ion 8 . 3 . ). Che ck t ha t t he bol ts a r e p r ope r l y
t igh t ened and t ha t t he y s how no s ign s o f damage .
The bol ts ma y be t igh t ened onl y on c e , a ft e r whi c h
t he y mu st be c hanged .