Final FI Tting Of The Operator; Final Assembly; Bleeding; Adjusting The Brake In Close Position - Aprimatic ZT42 Serie Instrucciones Para La Instalación

Installation
After cooling, apply a coat of rustproof paint to the welded zone
(C21).
3.8 FINAL FITTING OF THE OPERATOR
Spread graphitized-type grease on to the frontal anchorage pin of
the ball joint (C22 pos. 1).
Spread graphitized-type grease on to the ball joint (C23 pos. 2).
Fit the jointed head to the pin (C24 pos. 1) and fi x in place with the
snap ring (C24 pos. 2).
Fit the operator to the rear mounting with the fork pin (C25 pos. 3)
and its locknut (C25 pos. 4).
Using the template, check once more that the rod advances from
the operator to the set distance when the gate leaf is completely
closed; then tighten up the ball joint fi tting to the rod using a CH
12 hexagonal wrench (C26 pos. 5) and a CH 17 hexagonal wrench
(C26 pos. 6).
!
Warning
• When the mounting is completed, neutralize the hydraulic lock
(if present in the operators) by turning the correct key through
180° anti-clockwise, and move the gate-leaves manually to
check on the smoothness of the movement; this should be
done very slowly, otherwise the operators will take in air and,
consequently, will have to be bled.
• Open and close the gate leaf to check that the operator can
move freely without rubbing and without going against either
the gate leaf or the gate post.
• After making the checks, reset the hydraulic lock by turning
the release key fully in a clockwise direction.
3.9

FINAL ASSEMBLY

3.9.1 Bleeding

!
Warning
Before proceeding in setting the operator, bleed it.
Start the operator after having checked the setting of the pressure
relief valves, move it to stroke end either in open or close position
and, acting on the screw (see fi g. C27), lock and release the operator
a dozens of times.

3.9.2 Adjusting the brake in close position

!
Warning
The operator is standard supplied with cut-out
brake.
Do not unscrew the hydraulic brake setting screw
completely to prevent oil leakage.
For an easy adjustment, proceed as follows:
• Retract the rod inside the operator by means of the
manual release device or by powering the operator
opening.
• Tighten the slow-down setting screw (C28 pos. 1)
by rotating clockwise.
• Power the operator closing (rod extension) for a
longer time than the one necessary to complete the
maneuver. The rod movement stops.
• Rotate the slow-down setting screw (C28 pos. 1)
counter-clockwise. Rotate slowly for max 4 complete
turns until the rod starts moving again.
• Adjust the slowing-down as required by rotating the
screw of half-turn.
C21
C23
C25
C27
1
- 22 -
R
C22
C24
C26
C28
mm/sec
+
1