Parking Brake - Komatsu WA250-6 Shop Manual

SEN03828-00

Parking brake

1. Lever
2. Housing
3. Ball
4. Piston
No. Check item
Thickness of plate
9
Strain on plate
Thickness of brake disc
10
Strain on brake disc
Load of wave spring
11
(height: 2.2 mm)
Outline
This parking brake is a wet multiple disc type
q
brake being operated mechanically to apply
braking to output shaft (8).
Lever (1) is connected to the control cable. Ball
q
(3) provided between piston (4) and housing
(2), that are connected to lever (1), moves on
the slope of the piston groove responding to
the pulling distance of the parking brake lever.
By this move of the ball, piston (4) compresses
plate (5) and disc (6) to each other, thereby
applying brake to output shaft (8).
22
10-400
5. Plate
6. Disc
7. Wave spring
8. Output shaft
Criteria
Standard size Tolerance
2.6 ±0.06
— 0.05
2.2 ±0.08
— 0.02
1,010 N ±101 N
{103 kg} {±10.3 kg}
400 Brake system

Parking brake

Remedy
Repair limit
2.5
0.1
Replace
2.05
0.25
858 N
{87.6 kg}
WA250, 250PZ-6
1
Unit: mm