U20-3, U25-3 WSM Machine body (Service section)
II-S-32
SERVICE PO
RT OPERA
TION
CAUTION
To avoid personal injury:
• Tilt the service port pedal forward when the
pedal is not used. Be sure to lock the pedal.
This pedal is used to operate attachments such as
breakers.
(1) Service port pedal
(2) Pedal lock
(A) Sends oil to the port (A)
(B) Sends oil to the port (B)
4. Make sure the pedal swings equally right
and left (horizontal at the center).
To and fro →Service port
Right and left →Swing
5. Fit the pedal with its top horizontal at the
neutral position.
6. Move both the service port and swing port
spools full stroke and release them. Now
make sure the pedal goes back smoothly to
its neutral position.
1) Assembling procedure
1. Adjusting the pedal
Make sure the pedal stays horizontal at the
center and swings equally right and left.
To and fro→Service port
Right and left→Swing
2. Tightening torque of link ball lock nut
39.2~45.1N·m (4.0~4.6kgf·m)
3. Link fitting dimensions
Fit the link as shown at left.
(1) Port (A)
(2) Port (B)
• Push the back part of the pedal (Ø) to send oil
to the port (A).
• Push the front part of the pedal (Ð) to send oil
the port (B).
Anti-slippage
Anti-slippage
Anti-slippage
(1)
Anti-slippage
(1, SP pedal)
Fit the pedal with
its top horizontal
at the neutral
position.
5 Actual fitting
60
146
Max. Flow
Volume
theoretical L min.
U20-3 35.8
U25-3 48.0
Max. Pressure
MPa
(kgf/cm
2
)
U20-3
21.6 (220)
U25-3
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