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4-5
SERVICE BRAKE OPERATED
SERVICE BRAKE OPERATED
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.
22
21
23
24
26
2
29
18
17
16
15
20
19
25
16
30
18
18
Front
Rear
Parking
A
B
P
T
T2
P
B3
S3
T1
PP
S2
B2
B1
S1
G1
G2
PS
PS
PS
A
B
D
L
S
B
P1
T1
P2
T2
A1
A2
T/M
40
PS
Return line
Return line
Main pump
41
2)
2)
7609A4BS03
Summary of Contents for HL955
Page 557: ...7 6 MEMORANDUM MEMORANDUM ...