XCMG QAY220, Operation Manual

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QAY220 All Terrain Crane Operation Manual
7-11 Hydraulic oil tank 7-12 Specifications
The main function of hydraulic oil tank
is storing oil and radiating heat. It also has the
function of separating air and deposit from oil.
The suction port of the oil tank is designed at
the lower side of the tank, suction filter accuracy
is 180
μ
. The return port of the oil tank is
designed at the upper side of the tank, return
filter accuracy is 10
μ
. Check the suction filter
and return filter regularly to prevent clogging
which affects the effect of suction and return
oil.
W h e n c h a n g e t h e h y d r a u l i c o i l , t h e
superstructure should be in travel configuration
and butterfly valve be closed. Prepare tools for
cleaning oil tank and container for temporarily
holding hydraulic oil, and hose. And then
deliver the oil remained in tank to container by
opening the drain plug located at the bottom of
the oil tank. After the oil tank is cleaned refill
it with new hydraulic oil till specified level.
After that open the butterfly valve and the drain
hole on main pump, let the engine run at idle.
Close the drain hole after air is drained off.
Carry out operations such as hoisting, elevating,
telescoping and slewing (the boom must be
retracted after it is extended; too high elevation
is not allowed). After all movements have been
finished, check the oil level with the crane in
travel configuration. If the oil level is lower than
the specified mark, refill to the specified level.
Main circuit working pressure: 32Mpa
(refer to nominal value in
“
Hydraulic
system schemes
”
for setting value of each
relief valve)
Oil tank capacity: 1000 L;
Oil suction filter accuracy: 180
μ
;
Oil return filter accuracy: 10
μ
.
Hydraulic oil brand:
AE46 anti-wear hydraulic oil (Ambient
temperature above -15
℃
)
HS22 hydraulic oil (below -15
℃
, in
extremely cold area)
7-8
Hydraulic system
Chapter 7
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