Sicor MR21 User Manual

AC MUM0096 rev. 07 - 24 -
MR21
17. BRAKE WITH DEGREE OF PROTECTION IP21 AND IP54
17.1. PRE-ADJUSTMENT OF THE BRAKE
The winches are normally supplied with the brake that requires
some adjustment based on the characteriscs of the system. The
braking distance depends on the compression of the brake’s springs;
the springs need to be adjusted to obtain the braking torque of the
braking system that is suitable for the system, and in compliance with
EN81.20-50 (See chart).
If an addional adjustment is required, follow the instrucons
reported in the following chapter.
17.2. BRAKE ADJUSTMENT
The brake has two separate magnets so that the shoes operate
independently of each other.
Usually the brake shoes must open with the shortest stroke possible,
but without showing any fricon on the brake’s drum under the
normal winch working condion.
Check periodically the status of wearing of the brake’s shoes’ fricon
material. In case of wear, proceed with the adjustment operaons in
compliance with what’s provided in the following chapters.
During each adjustment intervenon, make sure that between the
opened brake’s shoe (winch free to rotate) there’s a space equal to
0.1-0.15 mm in the lining’s lower part, by verifying with a calibrated
spacer.
17.2.1. STROKE ADJUSTMENT
- Loosen the locknuts (2) on both the brake shoes and unscrew
the adjusng screw (1) leaving a clearance of 4-5 mm between
the screw and the electromagnet pin (5),
- turn the brake opening lever (6) to the “open (POS 2)” posion,
- ghten the adjusng screws (1) by hand unl they are ush with
the electromagnet pin (5),
- turn the brake opening lever (6) to the “closed (POS 1)” posion
and ghten the adjusng screw half a turn (equal to about 0.1-
0.15 mm in the lining’s lower part) against the electromagnet
pin,
- ghten the locknuts (2).
17.2.2. CHECKING THE ADJUSTMENT
Move the cab up and down and listen to the noise level. The stroke is correctly adjusted if the brake
lining does not touch the brake drum while the li is moving and no noise is heard when braking.
4
3
L = min
1
5
6
2
1
BRAKE ON
(brake shoes closed)
POS 1
BRAKE OFF
(brake
shoes open)
POS 2
BRAKE OFF
(brake
shoes open)
POS 2

Sicor MR21 Specifications

General

Brand	Sicor
Model	MR21
Category	Winches
Language	English