To Next Page

To Previous Page

AC MUM0040 rev. 11 - 22 -

MR12 - MR12C

15.1. 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.

15.2. 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.

1 2 5 6 2 15

“OPEN”

“CLOSED”

15.2.1. 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” 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” 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).

15.2.2. 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.

L = 59mm

Sicor MR12 User Manual

Questions and Answers: