Use Hydraulic Wing Control Option

N94173
N94173-UN-06SEP11

N94172
N94172-UN-08SEP11

A - Hydraulic Wing Control Valve

B - Dial Gauge

C - Grease Fitting

D - Lockup Valve

Optional hydraulic wing control valve (A) uses tractor hydraulic pressure and wing fold cylinders to adjust cutting force of wings.

Hydraulic wing control is to be operated with closed-center tractor hydraulic systems (tractors with load sensing or pressure on-demand hydraulics are classified as closed-center systems). Attempting to operate hydraulic wing control with an open-center hydraulic system could result in permanent tractor pump damage. See your John Deere dealer for more information.

Never operate machine in unfolded position with tractor SCV multi-function lever in NEUTRAL position. (Dial gauge (B) does not indicate “neutral” position.)

Always place SCV multi-function lever in either FLOAT or DETENT when machine is in unfolded position. Failure to position multi-function lever correctly could result in damage to wing-fold cylinders or frame.

When machine is in FOLDED position, be sure to place SCV multi-function lever in neutral position to disengage Hydraulic Wing Control.

A special rod end clevis is used on machines equipped with Hydraulic Wing Control. This clevis is pinned solid to wing frames and is identifiable by a grease fitting (C). NEVER operate tractor SCV multi-function lever in “neutral” as this holds wing frame rigid and may result in cylinder rod damage.

FLOAT position turns off Hydraulic Wing Control and allows wings to flex and follow uneven ground conditions.

  1. Open wing fold lockup valve (D).

  2. Engage Hydraulic Wing Control by placing SCV multi-function lever in “forward detent” position. The hydraulic wing control valve now controls hydraulic flow for wing-fold cylinders.

    Wing gauge wheels must be adjusted so wing frame is level with main frame when viewed from rear of machine. Hydraulic Wing Control is NOT intended to make up for mechanical mis-adjustment of wing frames. (See LEVEL WING FRAMES TO MAIN FRAME IN FIELD in this section.)

  3. N94174
    N94174-UN-06SEP11

    N96950
    N96950-UN-13APR12

    A - Control Valve Knob

    B - Lock Nut

    C - Gauge Needle

    D - PUSH WING Reading

    E - PULL WING Reading

    Turn control valve knob (A) in one-half turn increments until desired wing depth is achieved.

    Turn knob (A) COUNTERCLOCKWISE to INCREASE wing penetration. Dial gauge indicates PUSH WING (D).

    Turn knob (A) CLOCKWISE to DECREASE wing penetration. Dial gauge indicates PULL WING (E).


  4. Attach control valve at desired setting by tightening lock nut (B).

  5. To disengage hydraulic wing control, push tractor SCV lever/switch forward to FLOAT position.

  6. To prevent machine damage, do not operate unfolded with tractor SCV lever/switch in “neutral” position.

    Operate machine as described in PREPARING TO OPERATE IN FIELD in this section. If machine is performing satisfactorily and cutting depth is uniform, leave tractor SCV lever/switch in FLOAT position and continue disking.

  7. N94175
    N94175-UN-06SEP11

    A - Control Valve

    B - Lock Nut

    Periodically, as soil conditions change, monitor wing disking depth and adjust control valve (A) as desired. Attach control valve at desired setting by tightening lock nut (B).


If tractor hydraulic system has heat buildup or if wing control system fails to operate with tractor SCV lever/switch in “forward detent” position, there can be an “oil bypass condition” in tractor.

To verify bypass condition, listen for engine “pull down” and oil noise “hiss” at tractor multi-function lever.

Tractor control valve oil bypass problems are corrected by readjustment of tractor multi-function lever linkage. (See your John Deere dealer if necessary.)

Hydraulic wing control system can be turned off “on go” by placing tractor SCV lever/switch in FLOAT position. Dial gauge needle registers in section labeled FLOAT.

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