Drawn Machine Chatters When Lowering

CAUTION:

X9811
X9811-UN-23AUG88

Escaping fluid under pressure can penetrate skin causing serious injury. Avoid hazard by relieving pressure before disconnecting hydraulic or other lines. Tighten all connections before applying pressure. Search for leaks with a piece of cardboard. Protect hands and body from high pressure fluids.

If an accident occurs, see a doctor immediately. Any fluid injected in skin must be surgically removed within a few hours or gangrene may result. Doctors unfamiliar with this type of injury should reference a knowledgeable medical source. Such information is available from Deere & Company Medical Department in Moline, Illinois, U.S.A.

  1. Lower machine to level ground.

  2. Relieve all hydraulic pressure and turn tractor OFF.

  3. Disconnect depth control hoses from tractor.

  4. N69326
    N69326-UN-21MAR05

    A - Orifice Fitting and Elbow

    Remove orifice fitting and elbow (A) from base end of cylinder.


  5. IMPORTANT: Parts MUST be assembled with fitting (A) held vertically to keep 1-way orifice (B) correctly positioned, preventing orifice damage. Orifice MUST be able to float back and forth in fitting to operate correctly.

    Hold cylinder base end 3/4 in. fitting (A) in vertical position and remove fitting 2.36 mm (0.093 in.) 1-way orifice (B), and 3/4 in. 90° elbow with O-ring (C).

    N66311
    N66311-UN-08JUL04

    N66312
    N66312-UN-08JUL04

    N66313
    N66313-UN-08JUL04

    1-Way Orifice Positioned in Fitting—Orifice Slot Toward Bottom

    N66314
    N66314-UN-08JUL04

    Vertical Assembly of Fitting, 1-Way Orifice, and Elbow

    A - Fitting, 3/4 in.

    B - 1-Way Orifice, 2.36 mm (0.093 in.)

    C - Elbow with O-ring, 90°, 3/4 in.

    D - Orifice Slot


  6. Verify orifice IS IN CORRECT POSITION.

  7. Insert orifice in fitting with slot (D) toward bottom.

  8. Thread elbow in fitting.

  9. Install assembly to base end of cylinder and attach hose.

  10. Repeat procedure on other cylinder.

  11. Bleed depth control system. (See INSTALLING AND BLEEDING CYLINDERS in Service Section.)

OUO6061,0001DAA-19-20081017