Main Manifold Valves
Main Manifold Valves
34-J
Art_5781
ILLUSTRATION No.
ITEM NO.
DESCRIPTION
2.1, 2.2
CHECK VALVE
3
SHUTTLE VALVE
4
FLOW REGULATOR VALVE
5
PROPORTIONAL DIRECTIONAL VALVE
6
ORIFICE 0.60MM
7
CHECK VALVE
8
2 POSITION, 3-WAY VALVE
9
ORIFICE 1.30MM
10
2 POSITION, 3-WAY VALVE
11
DIRECTIONAL VALVE
12
PROPORTIONAL DIRECTIONAL VALVE
13
14
PROPORTIONAL RELIEF VALVE
15
CHECK VALVE
16
ORIFICE 0.75MM
17
HAND PUMP, BRAKE RELEASE
18
2 POSITION, 3-WAY VALVE
19
2 POSITION MANUAL VALVE
20.1, 2, 3
COIL 12 VOLT 30 WATT
21.1, 2, 3
COIL 12 VOLT 40 WATT
22.1, 2, 3
COIL 12 VOLT 50 WATT
23
COIL 12 VOLT 40 WATT
24
ORIFICE 1.60MM
25
RELIEF VALVE 3200PSI
26
PLUG SAE 04 Hol. Hex NBR
ORIFICE 1.0MM or PORT PLUG
QTY.
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
3
3
3
1
1
1
1
1
Prevents back flow: 2.1 for Emergency Pump efeciency. 2.2 for platform manifold.
Pilot control shuttle to route pilot hyd to Flow Regulator valve 4
Regulates flow to Lift circuit for better lift speed control
Directs pump flow to Boom Lift/lower in conjunction with operator input
Limits flow to Flow Regulator Valve (4) for smoother operation
Prevents back flow to emergency pump in normal operation
Telescope extend/retract function. Directional is dependent on valve 10 position.
Reduces flow to steering for proper steering speed.
Directs oil to retract boom when shifted. Routs return flow from extend when idle
Directs oil to steer cylinders, direction depending on operator input
Directs oil to Turret Rotate actuator, direction depending on operator input.
Orifice reduces flow to pump Load Sense pilot circuit for smoother operation
Limits system pressure proportionally depending on specific operation/s
Increased return flow pressure from platform manifold to prevent drain off when idle
Controls flow from brake circuit to allow slower brake application during deceleration
Converts human energy to hydraulic flow for emergency brake release
Directs flow to release brakes when drive is operated
Prevents brakes from releasing when brakes are released with hand pump
Converts 12 volts to electro-magnetism to shift Rotate and Brake valves
Converts 12 volts to electro-magnetism to shift Steer and Boom Ext/Ret valves
Converts 12 volts to electro-magnetism to shift Boom Up/Down and Boom Ret valves
Converts 12 volts to electro-magnetism to control system Relief pressure
Controls flow to limit Boom Extend/Retract speed
Limits system maximum pressure to 3200PSI
Seals open ports with removable cap, sometimes concealing other components
FUNCTION
34JD MAIN MANIFOLD
4
16
6
26
15
2.2
18
17
19
5
11
8
10
12
14
20.3
22.2
22.3
21.1
21.2
21.3
22.1
20.1 20.2
23
3
25
24
9
2.1
13
7
