Case 570T Operator's Manual page 67

Adjustment of self leveling linkage
1. Lower the loader to the ground.
2. Disconnect vertical linkage (3) at upper bell crank (1).
3. Raise loader arms so that the bottom hinge pin is
1520 mm (60 in) above the ground and fully roll back
the bucket.
4. Rotate the bell crank (1) to touch the tube (2) on the
loader arm.
5. Adjust the length of the vertical rod (3) so that when
re-connected, the end of the loader arm tube remains
in contact with bell crank.
6. Securely tighten locknuts on the vertical rod.
Return to dig system adjustment
The return to dig feature
Return to dig is an electrically activated 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 loader control lever (3).
The return to dig system
The return to dig system consists of an electromagnet
mounted on the bucket spool, a sensor (1) mounted on
top of the loader arm and a pointer (2) attached to the
tube of the bucket self-leveling linkage.
Whenever the bucket is rolled forward to dump, the return
to dig electrical circuit is completed and the solenoid on
the bucket spool is energised.
When the loader bucket control lever (3) is moved diago-
nally left to the return to dig position (4) the electromagnet
will hold the bucket spool in the roll back position until the
bucket is in the level digging position at which time the
indicator on the rod of the bucket self-leveling linkage will
pass in front of the sensor which de-energises the electro-
magnet on the bucket spool enabling the spool to return
to the neutral position.
Adjustment of the return to dig sensor
1. Place the bucket on the ground in the preferred digging
position.
2. Adjust the position of the sensor such that when the
bucket is in digging position and loader arms are low-
ered, half (50%) of the sensor face is obscured by the
self-leveling linkage pointer.
3. Ensure the face of the sensor (1) is 3.00 - 6.00 mm
(0.12 - 0.24 in) from the pointer (2) on the self-leveling
linkage.
3 - CONTROLS AND INSTRUMENTS
3-25
10
PTIL13TLB0500AB
11
PTIL12TLB0501AB
12
PTIL12TLB0499AB