Suspension; Tension Adjustment; Section Supports; Adjusting Sequence Valves - Hardi FTZ Force Boom Operator And Maintenance Manual

5 - Maintenance
Adjustments

Suspension

The FTZ boom is suspended on coil springs (A).
In order to obtain the best spray job, the boom wings must be
parallel with the ground surface. If an abnormal condition exists
the tension of the springs can be adjusted to improve the level of
the boom.

Tension adjustment

1. Loosen the three lock nuts (B).
2. Wind the three spring carrier bolts (C) in or out to tension or
de-tension the springs as required.
3. Check to see the level of the boom wings has been improved,
and re-tighten the lock nuts (B).
Note: When adjusting the coil springs, make sure the
bolts are all adjusted evenly.

Section supports

In order to avoid stress to section components when the boom
is folded for transport, adjustable section support brackets are
provided (A). If the section supports are adjusted correctly, the
outer wing sections will mount the bracket ramp and come to rest
fi rmly in contact with the rubber pads on the bracket (B).
Adjustment
Inspection and adjustment should take place after the other
section alignment procedures have been carried out. To check if
the support brackets are adjusted correctly:
1. Fold the outer wing sections only and observe the level of
contact between the wing and the rubber pads on the support
bracket (B).
2. If the wing section is not contacting the support pads, loosen
the two bolts (C) and adjust the hight screw (D) until the wing
section is in fi rm contact with the pads.
3. Re-tension the two bolts (C) and operate to confi rm your
adjustment was successful.

Adjusting sequence valves

The order / priority of fl uid supply to the fold cylinders is
controlled
by mechanicaly operated sequence valves (A) located at the
intermediate and outer folds.
1. With the outer section folded (valve activated), back off the
lock nuts (B) and the actuator screw (C) so that it just clears the
activating pin in the sequence valve.
2. Next, wind the actuator screw back out until it depresses the
activating pin to a depth of 3 to 4 mm and re-tension the lock
nuts. Note: Use the same principle and setting to adjust the
sequence valve at the intermediate fold.
A
5. 6
A
B
C
D
C
A
B
C
B
B