Operation - Kubota B1220 Workshop Manual

B1220, B1620, B1820, WSM

2. OPERATION

(1) Cam Plate
(2) Friction Plate
The brake body is incorporated in the rear axle case (4) filled with transmission oil and is designed to brake when
the brake disc (3) splinted with the differential gear shaft (6) is pressed against the cam plate (1) by means of the cam
mechanism incorporating steel balls (5).
For greater braking force, two brake discs are provided at the right and left sides respectively, and the friction
plate (2) fixed to the rear axle case is arranged between the brake discs.
During Braking
When the brake pedal is pressed, the linage causes the brake cam lever (8) and brake cam (7) to turn into the
direction of arrow shown in the above figure.
Therefore, the cam plate (1) also moves the direction of arrow. At this time, since the cam plate (1) rides on the
steel balls (5) set in the grooves of the rear axle case to press the brake disc (3), the differential gear shaft (6) is braked
by the frictional force generated by the cam plate (1) and brake disc (3).
(3) Brake Disc
(4) Rear Axle Case
(5) Steel Ball
(6) Brake Shaft
(Differential Gear Shaft)
5-M3
BRAKES
(7) Brake Cam
(8) Brake Cam Lever
9Y1210272BRM0003US0
(EU)
KiSC issued 07, 2011 A