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.ceomview/omlvu16217_g4/output/omlvu16217_g46.html (50 of 80) [4/3/2005 11:13:06 AM] OperatingUsing Rockshaft Control LeverMX10760Use rockshaft control lever (A) to raise and lower equipment attached to the 3-point hitch.The six calibrated setting are for reference only and do not signify specificoperating depths.When the rockshaft control lever is moved forward, the draftarms will lower closer to the ground.Lower Implement: Push rockshaft control lever forward.Raise Implement: Pull rockshaft control lever rearward.The adjustable depth stop (B) can be adjusted to maintain a particularimplement operating depth.To use the depth stop knob:1.Operate implement for a few minutes to determine the desired operatingdepth.2.Loosen the depth stop knob.3.Move knob against rockshaft control lever.4.Tighten knob to keep the depth stop in position.Implement will operate insame position each time rockshaft control lever is pushed against the depthstop.Using Rate of Drop/Lock Valvefile:///C|/projects/jd/manuals/utility/4120-4720/.ceomview/omlvu16217_g4/output/omlvu16217_g46.html (51 of 80) [4/3/2005 11:13:06 AM] Operatingc CAUTION: Avoid injury! Excessive rate-of-drop may cause injury ordamage.Fully lowering implement should take at least 2 seconds.IMPORTANT: Avoid damage! To prevent overheating hydraulic oil anddamaging machine, do not raise rockshaft when drop/lock valve is closed.The rate of drop/lock valve controls the rate of rockshaft drop when therockshaft control lever is operated.This provides direct rate of drop control for 3-point hitch mounted implements.The valve can also be used to hydraulicallylock the rockshaft (three-point hitch) in a desired position.MX32702, MX10712Picture Note: All controls shown may not be installedon your machine.Increase Rate of Drop: Rotate drop/lock valve knob (A)counter-clockwise to make drop faster.Decrease Rate of Drop: Rotate drop/lock valve knob (A)clockwise to make drop slower.file:///C|/projects/jd/manuals/utility/4120-4720/.ceomview/omlvu16217_g4/output/omlvu16217_g46.html (52 of 80) [4/3/2005 11:13:06 AM] Operatingc CAUTION: Avoid injury! Do not use the rockshaft drop/lock valve forholding an attachment in raised position for service work.Loss of hydraulicpressure could result in sudden drop of attachment.Lower attachment ontoblocks or remove from machine before servicing.Lock 3-Point Hitch: Rotate drop/lock valve knob clockwiseuntil tight.Unlock 3-Point Hitch: Rotate drop/lock valve knob counter-clockwise.Using Draft Linksc CAUTION: Avoid injury! Look down and behind before and whilebacking.Clear area of all bystanders before backing machine.1.Slowly back machine into position to align draft links with implement liftbrackets.2.Park machine safely.(See Parking Safely in the SAFETY section.)file:///C|/projects/jd/manuals/utility/4120-4720/.ceomview/omlvu16217_g4/output/omlvu16217_g46.html (53 of 80) [4/3/2005 11:13:06 AM] OperatingMX50913.For machines equipped with optional telescoping draft links: Raise lockinglever (A) and pull link (B) to extend as needed.4.Connect draft links to the implement.c CAUTION: Avoid injury! Fingers and hands can be pinched orcrushed.Be aware of potential pinch points and keep hands away.IMPORTANT: Avoid damage! Telescoping draft link locking levers must be inlocked position before operating the machine or link damage could occur.5.For machines equipped with optional telescoping draft links:a.Sit on operator's seat and start engine.b.Back machine until each lock lever snaps and secures each draft link in thelocked position.Leveling Implement Front-to-RearLeveling a 3-point hitch mounted implement front-to-rear is accomplished byadjusting the length of the center link:1.Park machine safely.(See Parking Safely in the Safety section.)MX43232.Loosen locknut (A).file:///C|/projects/jd/manuals/utility/4120-4720/.ceomview/omlvu16217_g4/output/omlvu16217_g46
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