Case 580SR Service Manual page 1066

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28 SECTION 84 - BACKHOE
ADJUSTMENT OF GUIDE PADS
Position the dipper in the vertical position.
Count the number of shims behind the adjusting
screws on the left and right hand sides of the dipper
to determine which side has the most shims.
Remove one shim from behind an adjusting screw
on the side of the dipper which contains the most
shims.
Refit the screw and tighten to a torque of 350 -
400 Nm. Do NOT over torque the bolt.
Repeat the procedure for the remaining three screws
on the same side of the dipper.
Recheck the gap.
If the gap remains greater than 1.5 mm remove a
shim from behind each of the adjusting screws on the
opposite side of the dipper.
After performing an adjustment apply a coat of Dry
Moly-coat grease to the slide rails of the dipper.
NOTE: when all shims have been removed the guide
pads must be replaced.
REPLACEMENT OF GUIDE PADS
To replace the guide pads it is necessary to separate
the inner and outer parts of the telescopic dipper us-
ing either of the following procedures which are de-
pendent on workshop facilities.
Procedure No. 1
Park the machine on level ground and lower loader
bucket.
Lower stabilizers sufficiently to remove the weight
from the rear wheels.
IMPORTANT: the rear wheels must remain in con-
tact with the ground.
Position the dipper on a suitable stand.
Attach hoist to inner part of the dipper.
Disconnect the hose connections to the bucket and
the telescopic dipper cylinders.
Remove telescopic dipper cylinder pin (1) and sepa-
rate inner and outer parts of telescopic dipper.