Komatsu Utility SK714-5, Shop Manual, Page: 35 / 258

10-9 SK714-5 SK815-5 SK815-5 turbo
.
Brake
The hydraulic motor is equipped with a negative brake.
• When the motor is at a standstill, or when the operator applies the brake, the braking piston (1) is pushed to the left
(
) by the force of the springs (2).
The friction disk (3), which has been integrated with the cylinder block by means of semicircular grooves, is com-
pressed between steel disks (4) and (5), which are integrated with the housing, and is thus blocked. The drive shaft
(6) can therefore no longer turn.
• When the motor is running and the operator disengages the brake, oil is sent under pressure to the chamber “A” .
The force exerted by the oil is greater than the force of the springs (2) and the piston (1) is therefore pushed to the
right (
) thus releasing the friction disk (3) and permitting rotation of the cylinder block (7) (and also of the drive
shaft).
RKS01040
4
7
8
10
3
4
7
8 10
9 2 3
B
A
␣
9 2 3
B
A
␤
6
3
RKS01060
7
4
7
4
3
1
2
5
6
A
3
1
2
5
6
A
STRUCTURE AND FUNCTION
FINAL DRIVE