Doosan DL220, Operation And Maintenance Manual

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OP001014 Operation
3-18
BOOM RAISE KICK-OUT
Placing bucket lever in "Boom Raise Detent" position will lock
bucket lever in raise boom position. Boom will raise until trip
plate (1, Figure 43) makes contact with bucket height limit switch
(2). When limit switch is tripped, boom will stop raising and
bucket lever will automatically be returned to "NEUTRAL"
position. Trip plate can be adjusted to control maximum height
that boom can be raised.
To raise boom to maximum height, past preset height, hold
boom and bucket lever in "Raise" or "Hold Raise" position until
boom has reached maximum height. Then remove your hand
from lever. Lever will automatically return to "NEUTRAL"
position. This prevents hydraulic pump from working against
relief valve (maximum pressure).
BUCKET ANGLE INDICATOR
Upper right side of bucket includes a bracket that indicates angle
of bottom of bucket. Top of bracket is parallel with bottom of
bucket. If bottom of bucket is not visible, top of bracket will be
visible.
1
2
FG015598
Figure 43
FG015599
Figure 44
IMPORTANT
Trip plate (1, Figure 43) must always be set to contact limit
switch (2) before boom cylinders reach maximum
extension. Maximum extension causes pump to force
fluid over relief valve.
FG015600
Figure 45