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John Deere 3120, 3320, 3520, 3720 - Operating

John Deere 3120, 3320, 3520, 3720 Tractor - Adjusting Seat

Adjusting Seat (JD 3120, 3320, 3520, 3720 Tractor No Cab) - Before starting engine to operate machine, adjust operator seat position, height and suspension. Adjusting Seat Position - Rotate operator seat adjustment lever clockwise. Slide seat forward or rearward to desired position. Release lever to lock seat in position where all controls can be easily reached. Adjusting Seat For Operator Weight - Flip out handle on operator seat weight adjustment knob. Turn handle clockwise or counterclockwise to reach desired suspension travel for operator weight. Suspension should not bottom out when properly adjusted. Return handle to closed position. Adjusting Seat (JD 3120, 3320, 3520, 3720 Tractor With Cab) - Adjusting Standard Seat Position - Sit on the operator seat. Rotate operator seat adjustment lever counterclockwise. Slide seat forward or rearward to desired position. Release lever to lock seat in position where all controls can be easily accessed.

Adjusting Standard Seat For Operator Weight

Flip out handle on operator seat weight adjustment knob. Turn handle clockwise or counterclockwise to reach desired suspension travel for operator weight. Suspension should not bottom out when properly adjusted. Return handle to closed position. Adjusting Deluxe Seat Position - Rotate operator seat adjustment lever counterclockwise. Slide seat forward or rearward to desired position. Release lever to lock seat in position. Make sure all controls can be easily accessed. Adjusting Deluxe Seat For Operator Weight - Lock park brake and start engine. Pull out on seat weight adjustment knob to increase the air pressure within the seat air diaphragm until desired suspension travel for operator weight. Suspension should not bottom out when properly adjusted. Push in on the knob to release air pressure from the seat air diaphragm until desired suspension travel for operator weight. Suspension should not bottom out when properly adjusted. Stop engine.

Using Seat Belt

If folding ROPS must be folded to operate in a low clearance area, do not use seat belt. Raise ROPS and use seat belt as soon as conditions permit. Pull belt end across operator lap. Install tab into buckle. A click will be heard when the tab locks into the buckle. Press red button to release seat belt allowing the belt to retract. John Deere 3120, 3320, 3520, 3720 Air Conditioner and Deicing System - Push top half of air conditioning and deicing switch to turn system ON. Push bottom half of switch to turn system OFF. Adjusting Air Conditioning Temperature - Turn air conditioning temperature control knob clockwise to circulate warmer air through vents. Turn knob counterclockwise to circulate cooler air through vents. The thicker the blue bar is on knob label indicates a cooler temperature setting and a thin bar indicates a less cool setting.

Adjusting Heater Temperature - Turn heater temperature control knob clockwise to circulate warmer air through vents. Turn knob counterclockwise to circulate cooler air through vents. The thicker the red bar is on knob label indicates a warmer temperature setting and a thin bar indicates a less warm setting. Testing Neutral Start Switch (PowrReverser) - Sit on operator’s seat. Lock park brake. Push all PTO engagement knobs to the disengaged/off position. Depress clutch pedal completely and: Move the transmission range shift lever to the N (neutral) position. Move the reverser lever to the forward or reverse position. Turn key switch to start position. Engine must not crank. Turn key switch to off position and move reverser lever to the center N (neutral) position.

Testing Seat Switch (PowrReverser)

Push all PTO engagement knobs to the disengaged/off position. Depress clutch pedal completely and move the transmission range and gear shift levers into the N (neutral) position. Start John Deere 3120, 3320, 3520, 3720 tractor engine. Set engine speed at 1500 rpm. Depress clutch pedal completely and: Move the transmission gear shift lever to any position other than N (neutral) position. Move the reverser lever to the forward or reverse position. Raise up from operator’s seat while depressing clutch pedal completely. Engine should stop. Turn key switch to off position and move transmission gear shift lever to the N (neutral) position.

Using Throttle Controls

Hand Throttle Operation - Use the hand throttle lever to set a constant engine speed for stationary operation (all models) or for field operation such as tillage (PowrReverser only). Decrease Engine Speed - Pull hand throttle lever down. Increase Engine Speed - Push hand throttle lever up. Foot Throttle Operation (PowrReverser Only) - Use the foot throttle to temporarily override/increase the hand throttle lever setting when the machine operation requires repeated engine speed change, such as when operating a loader. Set the hand throttle lever at middle operating rpm. Depress the foot throttle to increase rpm and machine speed. Release the foot throttle to return engine speed to the previously-set hand throttle lever position.

Starting the John Deere 3120, 3320, 3520, 3720 Engine

It is recommended to install optional engine block heater and hydraulic oil heater if operating machine in temperatures below -18C (0F). If temperature is below 0C (32F), follow the cold weather starting steps in this section. Lock the park brake. Push all PTO engagement knobs to the disengaged/off position. Move transmission to neutral position: PowrReverser: Depress clutch pedal completely and move the transmission gear lever and reverser lever to the N (neutral) position. eHydro: Remove foot from forward and reverse travel pedals. Lower any rear mount or mid mount implement to the ground by pushing the rockshaft control lever forward. Lower any front mounted implement to the ground using the SCV lever. Set hand throttle lever to the 1/3 fast position. Turn ignition key switch to the run position. Check instrument panel indicator lights: Alternator/battery charging light will illuminate. Park brake light will illuminate if park brake is locked. Engine oil pressure light will flash.

For cold weather starting, use the intake air heater system. Activate the intake air heater system by pushing in the ignition key switch with the key, and holding it there for the required time: 10-15 seconds for temperatures as low as -18C (0F). 15-30 seconds for temperatures below -18C (0F). Starter may be damaged if starter is operated for more than 20 seconds at a time: Wait two minutes before trying again if engine does not start. Turn key switch to the start position. Release key when JD 3120, 3320, 3520, 3720 engine starts. Check instrument panel indicator lights: Engine oil pressure light should go out within 5 seconds. Alternator / battery charging light should go out within 10 seconds. Set engine speed at full throttle if indicator light does not go out after 10 seconds. If indicator light continues to stay on, stop the engine and check for cause. In cold weather, run engine several minutes to allow engine oil and transmission oil to warm. It is normal for the engine to be louder and for blue-white exhaust smoke to be present during engine warm-up. The amount of exhaust smoke depends on air temperature. Warm the engine: In warm weather, set hand throttle lever to the 1/2 fast position for 1 minute without load. In cold weather, set hand throttle lever to the 1/2 fast position for 5 minutes without load.

Starting a Stalled John Deere 3120, 3320, 3520, 3720 Engine

Push all PTO engagement knobs to the disengaged/off position. Move transmission to neutral position: PowrReverser: Depress clutch pedal completely and move the transmission gear lever and reverser lever to the N (neutral) position. eHydro: Remove foot from forward travel and reverse travel pedals. Start engine. Continue with normal operation, or set engine at slow idle speed for 2 minutes before stopping the engine. Stopping the Machine - Position the machine on a firm, level surface. Stop machine motion: PowrReverser: Depress clutch pedal completely and depress both brake pedals. eHydro: Remove foot smoothly from forward or reverse travel pedals to stop motion. Move transmission to neutral position: PowrReverser: Depress clutch pedal completely and move the transmission gear lever and reverser lever to the N (neutral) position. Push all PTO engagement knobs to the disengaged/off position. Lower any rear mount or mid-mount implement to the ground by pushing the rockshaft control lever forward. Lower any front mounted implement to the ground using the SCV lever. Adjust hand throttle lever to set engine at slow idle speed. Allow engine to idle for 2 minutes. Lock the brake pedals together using the brake pedal latch. Lock the park brake. Turn ignition key switch to the off position. Remove the key. Wait for the engine and all moving parts to stop before leaving the operator’s station.

Emergency Stopping (PowrReverser)

Depress clutch pedal all the way down and depress both brake pedals. Turn key switch to off position. Do not release clutch pedal until all moving parts have stopped. If possible, lock the park brake. Emergency Stopping (eHydro) - Remove foot from forward or reverse travel pedals. Depress both brake pedals. Turn key switch to off position. Do not release brake pedals until all moving parts have stopped. If possible, lock the park brake.

Using SpeedMatch Option (eHydro)

SpeedMatch enables the operator to set the desired maximum travel speed for the machine. Full forward or reverse pedal travel distance can be used to control machine travel speed between stop and the desired maximum travel speed. Depress forward travel pedal until desired maximum travel speed is reached. Fully depress bottom of cruise switch to activate speedmatch function. Fully depress bottom of accel/decel switch to set maximum travel speed. Release forward travel pedal. Completely depress forward travel pedal to achieve desired maximum speed. Adjust maximum travel speed: Fully depress top of accel/decel switch repeatedly to increase speed by increments. Fully depress bottom of accel/decel switch repeatedly to decrease speed by increments. Fully depress top of cruise switch to return switch to middle position and disengage speedmatch.

Using MotionMatch (eHydro)

MotionMatch enables the operator to adjust machine acceleration and deceleration rates. Shorter starting and stopping distances can be set for applications requiring rapid changes in direction, such as operating with a loader. Longer starting and stopping distances can be set to avoid turf damage in other applications. A MotionMatch setting of 1 is the shortest rolling (starting/stopping) distance, and a setting of 9 is the longest rolling (starting/stopping) distance. Fully depress top of MotionMatch switch for quicker acceleration/deceleration response levels, and to reduce machine starting/stopping distances. Fully depress bottom of MotionMatch switch for slower acceleration/deceleration response levels, and to increase machine starting/stopping distances.

Changing MotionMatch Setting

Press and hold the display mode switch until the display reads Release. Release the display mode switch and display should read Coast. Press the display mode switch once again. For John Deere 3120, 3320, 3520, 3720 tractors without MotionMatch switch: Push the turn signal switch and return to neutral position to change to desired setting between 1 and 9. Position 5 is displayed as DEF, the factory default. For machines with MotionMatch switch: Push the turn signal switch and return to neutral position to change to desired setting between 5 and 9. Position 5 is displayed as LONG_D, the factory default. Push the turn signal switch and return to neutral position to change to desired setting between 1 and 5. Position 5 is displayed as SHRT_D, the factory default. To confirm the changes for MotionMatch setting, press display mode switch once again. Using LoadMatch (eHydro Model) - LoadMatch enables the operator to prevent the engine stalling during heavy load applications such as operating with a loader. Fully depress top of Loadmatch switch to engage LoadMatch. Fully depress bottom of Loadmatch switch to disengage LoadMatch.