Hardi MASTER PRO VHH, Instruction Book, Page: 61 / 82

6 - Maintenance
61
Trapeze locking device
The trapeze helps the boom to stay horizontal when unfolded and it protects the boom against vibrations and impacts. In
order to lock the boom during folding, the chains must be tight. If this is not the case even when the cylinder is fully
retracted, the chains must be strained.
Inner section adjustment
Before commencing this job make sure that the centre part is
completely horizontal = 71,7 mm exposed piston rod at the slanting
cylinder (A) (if fitted).
Boom wing should be horizontal. If not, align boom wing by means of
axle (B).
1.
Loosen nut (C).
2.
Rotate axle (B) till boom wing is horizontal.
3.
Fasten (C) again.
Outer section adjustment
Large outer section
1.
Loosen the two bolts.
2.
Align the boom by means of the control box (VHZ models) or the
hydraulic control lever (VHH/VHY models).
3.
When boom is aligned, bring the bolts into correct position = the
head of the bolt should just touch the small iron work (arrow).
Short outer section
1.
Loosen the two bolts.
2.
Align the boom by means of the control box (VHZ models) or the
hydraulic control lever (VHH/VHY models).
3.
When boom is aligned, bring the bolts into correct position = the
head of the bolt should just touch the small iron work (arrow).