Hyundai HL955 Manual page 348

2) 2) SERVICE BRAKE OPERATED SERVICE BRAKE OPERATED
Return line
22
Return line
21
Main pump
When the pedal of brake valve (19) is depressed, the operating force overcomes the force of the
spring, and is transmitted to the spool. When the spool moves down, the inlet port is opened, and
at the same time the hydraulic oil controlled the pressure level by the cut-off valve (15) enters the
piston in the front and rear axles. Therefore, the service brake is applied.
16
S1 B1
15
P
PS
18
PP
23
24
25
P1
T1
P2
T2
16
17
B2 S2 S3
18
G1
Parking
B3
18
G2
T1 T2
26
2
B
S L
4-5
Front
19
A1
20
40
A2
Rear
T/M
41
30
29
D
P A
A
T B
B
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