Over-Centre Boom Lock Adjustment - Hardi MEGA VPZ NK Original Instruction Book

Over-Centre Boom Lock Adjustment

The lock mechanism is adjusted as follows:
1. The "Horizontal Alignment of Inner and Outer Sections" on page 147 and "Vertical Alignment of Inner and Outer
Sections" on page 147 must be done correctly first!
2. Remove the hydraulic cylinder arm (A) from the lock arm bracket
(B) - remove the bolt.
3. Retract the stop screw (D). Also loosen the counter nuts on the
turnbuckle (C).
4. Adjust the lock mechanism so that it will lock by the force of a
hand. The force is adjusted by the length of the turnbuckle (C)
below the lock bracket (B). Adjust the turnbuckle (C) in steps of
approximately a quarter turn, until the lock force is correct.
5. Mount the cylinder arm (A) to see that it does not touch the boom
parts. Readjust lock mechanism, if necessary.
±
WARNING! The lock bracket (B) must be adjusted, so that the
cylinder (A) does not touch any part of the boom!
ATTENTION! Adjusted correctly, the lock mechanism should only unlock by applying firm hand force!
6. Tighten counter nuts on the turnbuckle (C) again.
7. Extend the cylinder (A) to its maximum.
8. Loosen the counter nut and turn the piston rod end to be aligned
with centre of hole at the lock bracket (B).
6 - Maintenance
147