Checking The Proper Balancing Of The Arm; Fig. 20 - Checking The Proper Balancing Of The Arm - Automatic Systems BL 227 EVO Technical Manual

7.4.1. CHECKING THE PROPER BALANCING OF THE ARM

• On SR model barriers (without automatic raising), the arm positioned at 45% with the brake disengaged should be lowered
slowly.
• On AVR model barriers (with automatic raising), when the arm is in the horizontal position, it should be raised gently in the
event of a power failure.
In addition to the high location of the spring on the hub, a fine adjustment can be performed by tightening or loosening nuts H
M10 at the bottom of the spring (see picture below).
1
• First proceed with the loosening of the locknut (3.).
• Then proceed with the fine adjustment of the spring tension by tightening (tensioning) or loosening (detensioning) the nut
(2).
• Check the proper balancing of the arm in accordance with the instructions given at the start of this chapter.
• Tighten and block the locknut (3)

Fig. 20 - Checking the proper balancing of the arm

34
BL 227 EVO
2
3