Operation Manual

BX25. RCK54(P)-23BX. RCK60B-23BX. LA240. BT601. WSM
HYDRAULIC SYSTEM
4. CHECKING, DISASSEMBLING AND SERVICING
[1] CHECKING AND ADJUSTING
(1) Relief Valve
Relief Valve Setting Pressure
1. Disconnect the hydraulic hose (1).
2. Install the hose and adaptor A and B (3) with pressure gauge (2).
3. Start the engine and set at maximum speed.
4. Move the control lever all way up to operate the relief valve and
read the gauge.
5. If the pressure is not within the factory specifications, adjust with
the adjusting shim (5).
Relief valve setting
pressure
Factory spec.
12.3 to 12.7 MPa
125 to 130 kgf/cm
2
1778 to 1849 psi
Condition
• Engine speed: Maximum
• Oil temperature:
45 to 55°C
113t0131 of
(Reference)
• Thickness of shim (5) :
0.1 mm (0.0039 in.), 0.2 mm (0.0079 in.), 0.4 mm (0.0157 in.)
• 0.27 MPa (2.74 kgf/cm
2
,
39.0 psi) pressure is increased
whenever the thickness
of adjusting shim is increased by 0.1 mm
(0.0039 in.).
(3)
3UBAAABNP060E
(1) Hydraulic Hose
A: Adaptor Tee, Swivel (9/16-18)
(2) Pressure Gauge
B: Adaptor B
(3) Adaptor Tee, Swivel
(9/16-18)
(a) Connect Pressure Gauge
(4) Relief Valve
(b) Connect Hydraulic Hose
(5) Shim
W1011231
3TAAAAFBPOO4A
5-S4