Case 580ST, Operator'S Manual

Page: 360 / 434

7 - MAINTENANCE
Loader bucket - self-leveling adjustment (Bent arm)
Models without straight loader arm
The “return-to-dig” device is an electrically activated
feature which enables the operator to automatically
return the bucket to a level digging position for a further
work cycle, with one simple movement of the control
lever
(3) .
Whenever the bucket is rolled forward to dump the re-
turn-to-dig electric circuit is completed and the solenoid
on the bucket spool is energized.
When the loader bucket control lever
(3) is moved di-
agonally left to the return-to-dig position (2) the electro-
magnet will hold the bucket spool in the roll back po-
sition until the bucket is in the level digging position at
which time the indicator on the rod of the bucket linkage
will pass in front of the sensor which de-energizes the
electromagnet on the bucket spool enabling the spool
to return to the neutral position.
LEEN12T0585AA
1
Return-to-dig sensor - adjustment
1. The return-to-dig system consists of an electromagnet
mounted on the loader bucket control valve spool, a
sensor
(1) mounted on top of the loader arm and a
pointer attached to the tube of the bucket self-levelling
linkage.
2. Place the bucket on the ground in the preferred digging
position.
3. Check the dimensions of 88.5 mm ( 3.48 in ) and
7.5 mm ( 0.29 in ) are maintained as shown.
4. Ensure that the face of the sensor (1) is 6 mm ( 0.23 in )
from the rod (2) .
LEEN12T0511AA
2
NOTE: As a visual aid for the operator, while seated in the cab, the pointer mounted on the loader arm can be seen
to align with the pointer on the return-to-dig linkage, when the loader arms are lowered and the bucket is in the level
digging position.
7-138