Loading ...
Loading ...
Loading ...
Miscellaneous—Operational Checkout
Continued on next page KR46761,0001414 -19-01AUG18-36/50
Boom, Arm, and
Attachment Drift
Check—Processor Only
TX1041265 —UN—28APR08
Boom, Arm, and Attachment Drift Check—Processor
CAUTION: Prevent possible injury from machine movement.
Make sure that area is clear of bystanders and large enough
to operate all machine functions.
Position attachment at maximum reach with arm-to-attachment pivot pin the same
height as boom pivot pin.
NOTE: Raise attachment to appropriate height to ensure that attachment does
not settle to the ground during test. If attachment settles to ground during
time limit, raise attachment to a higher level and repeat test.
Retract arm cylinder, then extend approximately 50 mm (2 in).
Measure distance from bottom of attachment to ground.
Stop engine.
Measure amount cylinders extend or retract in 5 minutes.
Compare measurements to specications.
Specication
Boom Cylinder—Drift............................................................................................20 mm
0.79 in
Arm Cylinder—Drift............................................................................................... 30 mm
1.18 in
Bottom of Attachment-to-Ground—Drift.............................................................. 150 mm
5.91 in
YES: Go to next check.
LOOK: Is cylinder drift within specication? NO: See an authorized
Hitachi dealer.
4-2-31
112321
PN=311
Loading ...
Loading ...
Loading ...