Tadano GR-300EX-3, Service Manual

Page: 26 / 157

13
WY02-1792E
Y-2 Y-2
Adjusting Pressure (Hydraulic Pressure)
2. Items
2.1 Winch
[NOTICE]
Oil temperature: 50±5°C (113 - 131°F) (Hydraulic oil: TADANO Hydraulic Oil LL)
Confirm set pressure on the crane information screen in the maintenance mode of AML.
Shift the control lever or switch while the engine is idling, then increase engine speed.
Item
(Mark)
Set pressure
Engine
speed
(min
-1
)
Check procedure
MPa kgf/cm
2
psi
Winch
hoisting up
(A)
27.5±0.5 280±5 3980±70 1900
(MAX.)
1. Deactivate the elevation slow stop circuit. (*1)
2. Block either of the joints (LS1 (G1/4): Auxiliary
winch, LS2 (G1/4): Main winch) between
hydraulic pilot control valve and hydraulic valve
(winch brake).
3. Turn the PTO switch ON.
4. Move the winch lever that is blocked at its full
stroke on the hoisting up side while the elevating
lever is moved at its full stroke on the lowering
side.
5. In this state, set the engine speed to 1900 min
-1
and check the pressure.
Aux. winch
hoisting
down
(B)
8.8±0.5 90±5 1280±70
700
(IDL.)
1. Deactivate the elevation slow stop circuit. (*1)
2. Block the joint (LS1 (G1/4): Auxiliary winch)
between hydraulic pilot control valve and
hydraulic valve (winch brake).
3. Turn the PTO switch ON.
4. Move the winch lever that is blocked at its full
stroke on the hoisting down side while the
elevating lever is moved at its full stroke on the
lowering side.
5. In this state, check the pressure.
Main winch
hoisting
down
(C)
8.8±0.5 90±5 1280±70
700
(IDL.)
1. Deactivate the elevation slow stop circuit. (*1)
2. Block the joint (LS2 (G1/4): Main winch) between
hydraulic pilot control valve and hydraulic valve
(winch brake).
3. Turn the PTO switch ON.
4. Move the winch lever that is blocked at its full
stroke on the hoisting down side while the
elevating lever is moved at its full stroke on the
lowering side.
5. In this state, check the pressure.
(*1): To deactivate the elevation slow stop circuit, disconnect the connector (CN125) (01) of the elevation
proportional control valve. (After adjusting, connect the connector (CN125).)