Selective Control Valves - Connect Hydraulic Hoses

X9811-UN-23AUG88

LX234751-UN-14OCT15

LX234608-UN-24MAR15

(Mechanical) Multi-Function Lever

LX234750-UN-14OCT15

A - SCV Locking Lever

B - Locking Ring, Mechanical Multi-Function Lever

D - Identification Number

E - Retract Coupler

F - Retract Icon

G - Extend Icon

H - Extend Coupler

CAUTION: Escaping fluid under pressure can penetrate the skin causing serious injury. Avoid the hazard by relieving pressure before disconnecting the system lines.

If an accident occurs, consult a doctor immediately. Any fluid that penetrates the skin must be surgically removed within a few hours or gangrene can result.

CAUTION: Avoid personal injury. Before implements are attached, hydraulic hoses are connected, and to avoid unintentional implement movement, observe the following:

• Shut off the engine.

• Set selective control valve controls to neutral position and lock them.

IMPORTANT: Hydraulic hoses can fail due to physical damage, kinks, age, and exposure. Check hoses regularly.

Any dirt, dust, or other foreign material can damage hydraulic system. Thoroughly clean hydraulic hoses and SCVs before connecting an implement to the tractor.

IMPORTANT: Steam cleaning or using a high pressure washer in the area around the SCV connections and electronics may damage equipment. In the case of high-pressure washers with a pressure of more than 6900 kPa (69 bar) (1000 psi), a min. distance of 200 mm (8 in.) to the connections has to be maintained.

1. Engage the park lock and shut off the engine.

2. Lock out SCV controls:

   • Bring the SCV control lever into the neutral position and lock with the levers (A).
   • Bring the (mechanical) multi-function lever¹ into the neutral position and turn the locking ring (B) in a clockwise direction.
   
   

3. Clean dust caps. Turn dust caps to the side to expose ports.

4. IMPORTANT: Be sure to correctly connect hydraulic hoses to couplers. If hose connections are reversed, machine will not respond to system controls as expected.

   Assignment of SCVs at rear

   Extend = lower port

   Retract = upper port

   NOTE: The SCV ports are identified by numbers I to III (D).

   Check if symbols (F) or (G) on the ports, indicating cylinder movement, match cylinder travel direction.

5. If a single-acting cylinder is connected to an SCV, connect hose into the bottom part of extend coupler (H). If double-acting cylinders are used extend coupler (H) is located at the bottom and retract coupler (E) is located at the top.

6. Push hose(s) firmly into the coupler(s).

NOTE: SCVs are color-coded for easier identification. Hose identification kits are available from your John Deere™ dealer.

SCV Coding
Selective Control Valve	Color
I	Green
II	Blue
III	Brown