5-S4
BX24, 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).
Condition
• Engine speed : Maximum
• Oil temperature : 45 to 55 °C
113 to 131 °F
(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.).
W1011231
Relief valve setting
pressure
Factory spec.
12.3 to 12.7 MPa
125 to 130 kgf/cm
2
1778 to 1849 psi
(1) Hydraulic Hose
(2) Pressure Gauge
(3) Adaptor Tee, Swivel (9/16-18)
(4) Relief Valve
(5) Shim
A : Adaptor Tee, Swivel (9/16-18)
B : Adaptor B
(a) Connect Pressure Gauge
(b) Connect Hydraulic Hose
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