Specifications, Service and Repair of Farm and Lawn Tractors

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John Deere 5090M, 5100M, 5115M Hydraulics


JD 5090M, 5100M, 5115M - Front Hitch and Selective control valves

TO use the front hitch or the front SCV couplers, the operator must shift the diverter valve. SCV I lever controls the front hitch functions. Neutral - front hitch does not move. Lower - front hitch is powered down and has down pressure. Float - front hitch lowers and follows the ground contour. Raise - front hitch lifts. SCV II lever controls the couplers on the front hitch. The function of the front couplers are the same as rear SCV II.

John Deere 5090M, 5100M, 5115M - Connect Hydraulic Hoses

Hydraulic hoses can fail due to physical damage, kinks, age, and exposure. Check hoses regularly. Replace damaged hoses. Selective control valve (SCV) couplers accept a standard hose tip as recommended by ISO1 and SAE2. Adapters are available to update older hose tips to the ISO couplers on this machine. When making connections, it is helpful to relieve hydraulic pressure from the couplers. For mechanical SCVs, turn the key switch off and cycle the SCV levers to the float position.



Installing hydraulic hoses in SCVs: Clean area around where connection is made and end of implement hydraulic hoses to prevent hydraulic system contamination. Open SCV coupler dust covers as required. Determine extend and retract hoses. Firmly push hoses into couplers. Lightly tug on the hoses to ensure that connection is made. If connections are difficult, relieve pressure at couplers.

Removing hydraulic hoses from SCVs: Lower implement to ground before disconnecting hydraulic hoses. If possible, retract remote cylinders as much as possible when stored to protect the rod from damage. Shut off engine. Relieve pressure at the couplers. Lock out SCV controls. Engage transport locks for rear SCVs. Engage lock on multi-function lever for mid-SCVs. Pull hoses straight out from couplers. Close SCV coupler dust cover.

Connect to Rear SCVs

Identify extend and retract hoses. Remove dust caps from hose end. Open coupler covers. Making sure that hose end and coupler are clean, push hose tip firmly into SCV coupler. Pull on hose making sure that positive connection is made. Connect retract hoses to top couplers and extend hoses to bottom couplers.

JD 5090M, 5100M, 5115M - Connect to Mid-SCVs

Connections are capped and require couplers to be installed if using hose with ISO ends. Direct connection to the fittings can be made for permanent applications. Match hoses to corresponding couplers. Remove dust caps from hose ends. Remove cap assembly from the selective control valve (SCV) couplers. Ensure that hose end and couplers are clean, slide sleeve back, push hose tip firmly into coupler and release sleeve. Make sure that positive connection was made by pulling on hose. Always use SCV extend ports for lift functions for best performance. Deluxe SCV sections (with flow control and selectable detents) perform better than standard SCV sections.

John Deere 5090M, 5100M, 5115M - Single-Acting Cylinders

Volume of oil required to extend a cylinder lowers the transmission-hydraulic oil level. With cylinder fully extended, check oil level and fill to the proper level. Only connect single-acting cylinders to SCV extend coupler. Pull Selective control valves lever back to pressurize and extend a single-acting cylinder. Push SCV lever fully forward to float position and retract the cylinder.

Implements Requiring Large Volumes of Oil

Removing too much oil can result in malfunction when raising hitch or using extend function of SCVs. Do not add oil to hydraulic system with engine running. To determine if sufficient oil is available for implement being used: Cycle all implement cylinders after starting machine. Check transmission-hydraulic oil level. Add oil if necessary. Lower implement to return oil to reservoir. Recheck oil level when implement is removed. Drain excess oil if necessary.

John Deere 5090M, 5100M, 5115M - Operate Hydraulic Motor

Use SCV I retract coupler with adjustable flow control for most hydraulic motor operations. To regulate oil flow when operating a hydraulic motor with any standard valve without adjustable flow control, use an external flow control valve.

Hydraulic Motor Hose Connections and SCV Lever Operations

Use only SCVs with adjustable flow control for continuous (motor) applications. Shut off engine. Move SCV lever to be connected to motor full forward, into float detent. Connect hydraulic motor supply hose to the SCV retract coupler and return hose to the SCV extend, or case drain as required by application. Set SCV lever detent for continuous motor operation. Start engine. Do not return hydraulic motor directly to sump via a port on differential case, except intermittent high-pressure applications, such as a post pounder. To activate hydraulic motor, move SCV lever to retract position. To stop hydraulic motor, move SCV lever fully forward into float detent. To stop hydraulic motor, do not use neutral lever position. Shut off engine and disconnect hoses from couplers.

JD 5090M, 5100M, 5115M - Operate Power Beyond with Selective control valves

Power beyond connections must be used when operating any external hydraulic orbital motor with this machine. Failure to comply with power beyond connections overheats and possibly damages the hydraulic system. Oil can be supplied to power beyond equipment using SCV 1 on the deluxe SCV (in continuous mode) or by using a power beyond kit with the standard dual rear SCV. Shut off engine. Connect power beyond hose to SCV I extend coupler. Set rear SCV I detent to continuous. Start engine. Move SCV I lever into extend. Oil is now supplied to power beyond device. To stop, de-activate power beyond device, then return SCV I lever to neutral. Shut off engine and disconnect hoses.

Adjust Flow Control

Decrease flow rate if hydraulic oil overheats, remote cylinder moves too quickly, or if hydraulic motor turns too fast. Flow control adjustment only affects rear SCV I. This adjustment does not affect other valve sections. Maximum flow possible on electrohydraulic section of three-function mid-SCV is 45 L/min (11.9 gal/min). To increase flow, rotate left (counterclockwise). To decrease flow, rotate right (clockwise). If detent kicks out before end of cycle, use SCV I and adjust flow control.

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