Operation Manual

(4)
(2)
P T
81
(5)
fl~i~;[;[;;'i;;;;;i~;';11 : a
_:b
BX25, RCK54(P)-23BX, RCK60B-238X, LA240, 8T601, WSM
FRONT LOADER
• Up
P.B.;..------""""ir---------~::....--___.
(5) Neutral Passage 1
P : P
Port (From Pump)
B1 : B1 Port (To Boom Cylinder)
(6) Load Check
Valve
T : T Port
(To Tank)
P.B. :P.B. Port (To 3 Hitch)
(7) Passage 1
A1 : A1 Port
a :
Low Pressure
(8) Boom Cylinder
(From
Boom Cylinder)
b :
High Pressure
1. When the hydraulic control lever is set to the "UP" position, the spool (3) of the boom control section (1) moves to
the left, which forms oil passages between passage 1 (7) and
B1 port, and between A1 port and P.B. passage 1
(4
).
2. As the oil passage from the neutral passage 1 (5) to the P.B. passage 1 (4) is closed by the spool (3), the pressure-
fed oil from the P port opens the load check valve (6) and flows through the notched section
of the spool (3) and
B1 port to extend the boom cylinder (8).
3. Return oil from the boom cylinder (8) flows from the
A1 port through the passage in the spool (3) and P.B. passage
1 (4) to the bucket control section (3).
3TAAAAGLP018A
(1) Boom Control Section
(2) Bucket Control Section
(3) Spool
(4) P.B. Passage 1
8-M4