Position Control Adjustment; Linkage Adjustments; Adjustment Procedure - Shibaura ST450 Operator's Manual

POSITION CONTROL ADJUSTMENT

Linkage Adjustments

The length of the position control rod is critical
and careful adjustment must be observed for
proper operation. If the control rod is adjusted too
short, the control valve spool will remain in the
raised position when the lift arms have reached
their maximum height and the system relief valve
will open to relieve hydraulic pressure. If the
control rod is too long, the control valve spool will
return to neutral before the lift arms reach their
full height.
The position control rod should be adjusted any
time the link is disconnected for service to the
hydraulic system, or any time the relief valve
operation is noticed while the lift arms are at the
full raise position.

Adjustment Procedure

1. Set the position control lever (1) in Figure
2-51 (See page 2-27), to the highest position.
2. Loosen the locknut (1) in Figure 2-52, on the
position control rod (2) in Figure 2-52.
3. Start the engine. Adjust the length of control
rod (2) in Figure 2-52, shorter until relief valve
start operate.
4. Then lengthen the control rod (2) in Figure
2-52 until the relief valve ceases operation,
and one additional turn and tighten the
locknut (1) in Figure 2-52.
5. Check the operation. The relief valve should
not operate when the lift arms are in the fully
raised position.
SECTION 2 – OPERATION
2-28
Figure 2-52