Linear Travel
When performing travel operation and attachment or
travel and swing operation, this function maintains linear
travel.
Example: Low speed travel and boom up operation.
During travel operation, pressurised oil from port A1
(front pump) enters port 5P of the control valve.
Pressurised oil from port A2 (rear pump) enters port 4P
of the control valve. Each flows to the left and right
travel motor and engages travel operation.
When the boom up operation is executed, the upper
side pilot signal passage in the control valve is
intercepted and the travel linearity spool is switched.
The pressurised oil delivered from port A2 (rear pump)
flows through port 4P of the control valve and flows to
the left and right travel motors.
The pressurised oil delivered from port A1 (front pump)
flows through port 5P of the control valve and flows to
the boom cylinder side. in this way travel linearity is
maintained during multiple operations.
3 - 8
Section E Hydraulics
9803/6020
Section E
3 - 8
Issue 1
Schematics
A
Pressure Lines
B
Return Line
C
Pilot line
D
Boom Ram
E
Travel Motor (Right)
F
Travel Motor (Left)
G
Rotary Coupling
H
Control Valve
J
Hydraulic Pump
K
Boom 1
L
Boom 2
M
Travel (R)
N
Travel (L)
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