If the steering control unit drive is not timed correctly, the
machine can turn in the opposite direction as the steering
wheel. To prevent personal injury, loss of life and/or
property damage, make sure the drive is timed as follows.
The steering control unit (SCU) must be timed. This
requires obtaining the correct relationship between pin
(18), geroter (6) and geroter housing (4). One end of pin
(18) will point to the largest clearance between the geroter
and geroter housing. The other end of the pin points to
the least clearance. Pin (18) cannot be seen after drive (8)
s installed, so it will be necessary to make a mark on the
gear end of the drive for proper alignment.
Install O-ring seal (5) in geroter housing (4). Install
geroter (6) in geroter housing (4). Put the geroter in
position on the spacer plate. Align the star valleys.
There should be a parallel relationship of the
components. Align all the cap screw holes without
disengaging the geroter from the drive.
Install spacer (7) in the geroter housing.
Install O-ring seal (3) in end cap (2). Install the end cap
in its original position on the geroter housing. Be sure
the cap screw holes in the end cap are in alignment.
Install seven cap screws (1). Tighten the cap screws in
the sequence shown to an initial torque of 17 N·m (150
lb-in). Tighten the cap screws in the sequence shown
to a final torque of 28 ± 3 N· m (250 ± 25 lb-in).
install steering control unit (SCU)