Specifications, Service and Repair of Farm and Lawn Tractors

John Deere 5620, 5720, 5820 Engine and Drivetrain

5620, 5720, 5820 John Deere Engine

Starting the Engine

- Set selective control valve levers to neutral position.
- Move hand throttle lever to a medium speed setting (first third of lever travel).
- Set reverse drive lever to neutral position.
- Turn key in main switch clockwise to end position. Release key as soon as engine starts.

Do not operate starting motor for more than 30seconds at a time. Turn key in main switch to "zero". Wait at least one minute before attempting to start again. Do not adjust hand throttle lever. Run engine for a few minutes. At temperatures below 0C (32 F), extend warm-up period accordingly.

Engine Air Cleaner

- If the air cleaner indicator lamp glows during operation, remove and clean the primary filter element.
- The service interval may be extended briefly, e.g. until the next suitable opportunity.
- Provided the cleaner is serviced properly, this will not adversely affect its performance.
- The primary element can be cleaned up to five times. Thereafter, or at the latest after 1500 hours of operation (or 2 years), it must be replaced.
- Open the hood, then release catches. Remove cover. Pull the primary filter element out of the cleaner housing.

Cleaning a Dusty Element

- If tapping element does not remove dust, blow out the dust with compressed air by inserting nozzle inside the element and blowing from the inside of the filter to the outside.
- Pressure must not exceed 600 kPa (6 bar; 90 psi).
- Replace element if air cleaner indicator light continues glowing after the element has been cleaned.

Cleaning the Cab Air Filter

- Every time the engine air cleaner is serviced, also clean the two cab air filters (one of each on either side of the cab).
- Take out screws and remove cover. Remove filter.
- With the nozzle on the clean side, use compressed air to blow the dust out of the filter elements.
- Replace cab air filters together with engine air cleaner element.

Recirculating filter (JD tractors with air-conditioning system)

- On JD 5620, 5720, 5820 tractors with air conditioning system also clean the two recirculating air filters (one of each on either side of the cab).
- Pull cover on outer side down and remove.
- Loosen attaching screws and remove bracket. Remove filter.
- With the nozzle on the clean side, use compressed air to blow the dust out of the filter elements.
- Replace recirculating air filters together with engine air cleaner element.

Check Fuel Filter

- If water or sediment deposits have settled in filter, proceed as follows: Loosen drain screw.
- Retighten the screw as soon as water and sediment deposits have drained out.
- Turn key in main switch to the right to the first switch position so that the fuel transfer pump is operating. Keep the pump running for approx. 20 seconds.
- If water was present in fuel filter, use a 1/2-inch square-section key to loosen drain plug under the fuel tank by one turn.
- After draining off any water and sediment deposits, retighten drain plug until hand-tight.

Replace Fuel Filter

- Unfasten filter retaining ring and remove filter. Seal old filter with cover of the new one.
- Remove water separator and install it on new filter.
- Attach new filter. The marks on the filter must be aligned with those on the housing.
- Tighten retaining ring until it clicks into place.
- Turn key in main switch to the right to the first switch position so that the fuel transfer pump is operating. Keep the pump running for approx. 20 seconds.

Replace Primary Fuel Filter

- Remove fuel lines.
- Loosen clamp and remove primary fuel filter.
- Install filter element. Arrow must be pointing forward.
- Turn key in main switch to the right to the first switch position so that the fuel transfer pump is operating.
- Keep the pump running for approx. 20 seconds.

John Deere 5620, 5720, 5820 Power Take-Offs

PTO Options

The JD 5620, 5720, 5820 tractor may be equipped with one of the following PTO versions:

- Shiftable PTO for 540/540E rpm
- Shiftable PTO for 540/540E/1000 rpm

In addition, a 1000 rpm front PTO can be installed.

PTO Speeds

Power Take-Offs standard speeds are achieved at the following engine speeds:

- 540 rpm rear PTO: approx. 2100 rpm
- 540E rpm rear PTO: approx. 1700 rpm
- 1000 rpm rear PTO: approx. 2100 rpm
- 1000 rpm front PTO: approx. 2185 rpm

Operating Power Take-Offs

Always disengage the Power Take-Off when not in use. The PTOs can be engaged and disengaged on-the-go and under load. When a PTO is engaged, the relevant lights comes on.

To switch on the PTO, press the lever down and then forward. To switch off the PTO, pull the lever back. If the engine is shut off while the PTO is running and then restarted, the PTO will not re-engage. Even so, lights remain on. Switch off PTO and then restart.

On 5620, 5720, 5820 John Deere tractors with PowrQuad transmission, the indicator light for the front PTO is located above the switch and the display for the rear Power Take-Off is on the dashboard.

Operating the PTO by Remote Control

The rear PTO can be engaged and disengaged as described above regardless of whether a tractor is equipped with HMS. If the rear PTO is to be operated from outside the cab, first press preselector switch. Preselector and Rear PTO Indicator lights come on. Then switch on rear PTO at Rear PTO switch. The PTO does not start at this stage; a continuous whistle signal is heard; the hazard warning lights flash.

To switch on rear PTO from outside the cab, proceed as follows:

- Press remote-control switch on the fender. Rear PTO slowly starts up; hazard warning lights go out; rear turn signal light remains on (see arrow).
- Release remote-control switch within 4 seconds. Rear PTO coasts down (the whistle signal sounds continuously and the hazard warning lights flash).
- If the rear PTO is to be operated for a lengthy period, press remote-control switch for at least 4 seconds until the continuous light at rear turn signal (see arrow) goes out. To switch off the rear PTO, actuate remote-control switch - the whistle signal sounds intermittently and the hazard warning lights flash - or press the rear PTO switch in the cab.
- If the rear PTO is switched on in the cab, the rear PTO may be switched off at remote-control switch, but it cannot be switched on again without re-entering the cab.

Selecting Rear PTO speed

- The Power Take-Offs is engaged and disengaged as described under "Operating Power Take-Offs".
- The PTO must be disengaged to select PTO speed.
- PTO speed is selected by means of lever as shown on decal.
- With the lever in the position(s) "N", the PTO shaft can be turned by hand to facilitate drive shaft connection.
- The selected PTO speed is indicated by lights. Depending on tractor model, the shift pattern (shown on decal) as well as the arrangement of the lights can vary.

Attaching PTO-Driven Equipment

On John Deere 5620, 5720, 5820 tractors with swinging drawbar, proceed as follows:

- Align swinging drawbar parallel to PTO shaft and lock it in position.
- Distance from end of PTO shaft to hole in drawbar end should be 350 mm (13.8 in.) for the 540 rpm PTO and 400 mm (15.7 in.) for the 1000 rpm PTO.

If Power Take-Offs splines are not aligned with the grooves in the u.j. shaft, keep the engine shut off and move the PTO control lever to a position marked "N", then turn the Power Take-Off shaft manually to the correct position.

JD 5620, 5720, 5820 Transmission

Shifting the PowrQuad Transmission

Gears are shifted by means of range shift lever, gear shift lever and reverse drive lever. Slightly lift the reverse drive lever to move it out of the neutral position. After the engine has been started wait for 5 seconds before moving the reverse drive lever out of neutral position. The clutch pedal must be depressed to change the ranges. There is no need to depress the clutch pedal to shift gears or to change the direction of travel. Engage park lock (if equipped) only when the tractor is stationary.

Optimum gear-shifting for driving under load (transport):

- Select a range suitable for driving away under load.
- Engage the first gear.
- Drive away and change up through the ranges until the top range is reached.
- Change up through the gears.

Shifting the PowrQuad Plus Transmission

Gears are shifted by means of shift lever, gear shift keys and reverse drive lever. The clutch pedal must be depressed to change the ranges. There is no need to depress the clutch pedal to shift gear or to change the direction of travel. When changing ranges, an automatic function ensures that the gear selected matches the
travel speed. Engage park lock only when the 5620, 5720, 5820 John Deere tractor is stationary.

If the range shift lever is moved to its park position while the reverse drive lever is not in its neutral position, three acoustic signals are triggered and the letter "N" starts to flash. If the range shift lever is moved out of its park position again while the reverse drive lever is not in its neutral position, three acoustic signals are triggered again.

When the engine shuts off, the reverse drive lever remains in its selected position but the transmission shifts into neutral. Once the engine is restarted, the letter "N" begins to flash to draw attention to this situation. To make the tractor move, first put the reverse drive lever in neutral and then move it to the desired position. If a direction of travel is selected via the reverse drive lever and the range shift lever is in its park position, an acoustic warning is triggered.

If an electrical defect is detected at the reverse drive lever, the "N" light begins to flash and the tractor cannot be driven, regardless of which position the reverse drive lever is in. If the reverse drive lever detects an invalid position, after a certain period of time it shifts the transmission into neutral (the delay is for safety reasons). The letter "N" lights up. Once the engine has started, wait for 5 seconds before moving the reverse drive lever out of neutral position.

Optimum Gear-Shifting for Driving under Load (Transport):

- Select a range suitable for driving away under load.
- Engage the first gear.
- Drive away and change up through the ranges until the top range is reached.
- Change up through the gears.

Cold-weather operation - If the oil is cold, it may affect how the reverse drive lever operates. At temperatures below -10C (14F), it may take longer to change the direction of travel. In certain circumstances, the reverse drive lever may have to be actuated several times before the tractor starts to move. When the oil has had time to warm up, operation becomes normal again.

"Come-home" mode - Under certain circumstances, the tractor can still be driven even if there is an electrical fault in the transmission. To do this, stop the engine, remove plug K08/4 (relay box K08) and re-install it at a position 90° from its original position. The wording Come Home must be uppermost. The acoustic warning is continuous while the John Deere 5620, 5720, 5820 tractor is being driven.

Engaging Front Wheel Drive

- Front-wheel drive can be engaged and disengaged in all gears (forward and reverse), on-the-go and under load without using the clutch.
- Disengage front-wheel drive before driving at high speed on public roads.
- When the brakes are applied, front-wheel drive cuts in automatically regardless of the position selected at the front-wheel drive switch.
- The front-wheel drive indicator light is on.

With Headland Management System HMS (if equipped):

- Besides the "on" and "off" functions, this system also has an automatic position.
- When "automatic" is selected, front-wheel drive switches itself off automatically whenever tractor speed exceeds 23 km/h (14.3 mph).
- When tractor speed drops below 21 km/h (13 mph), front-wheel drive switches itself on automatically again.

Engaging the differential lock

- If wheel slip varies greatly between rear wheels, engage differential lock by means of switch. To disengage the differential lock, depress the brake pedal.
- If JD 5620, 5720, 5820 tractor speed exceeds 12 km/h (7.5 mph) with the differential lock engaged, the differential lock switches itself off automatically.
- When tractor speed drops below 12 km/h (7.5 mph) again, actuation of the differential lock must be carried out manually by the driver.

Hydraulic Foot Brakes

- Brake pedals must be coupled together by means of pedal coupler when driving on public roads.
- For field operation, slide the pedal coupler to the right. The brake pedals can now be operated individually. In this case, only the l.h. or r.h. rear wheel is braked. Use individual brakes to assist in making sharp turns. Use brake to assist steering at low tractor speeds only.
- When stopping the tractor, press down on both brake pedals at the same time.
- When braking, front-wheel drive engages automatically. The front-wheel drive indicator light is on.

Hydraulic Trailer Brakes

- Pull dust cover off coupler. Connect the pressure hose.
- Make sure the connections are absolutely clean.
- Press down on brake pedals to operate hydraulic trailer brake.
- The braking effect depends on pressure applied to the brake pedals.

Trailer air brake

- The air brake is available as dual-line system or as combined single-line and dual-line system. Trailers with single-line brakes may be connected at connection.
- Trailers with dual-line brakes may be connected at connections.
- Ensure that the connections are clean before joining the compressed air hoses. Seal the connections with the dust caps whenever the hoses are disconnected.
- The single-line trailer brake may be used at speeds up to 25 km/h only. When travelling with the John Deere 5620, 5720, 5820 tractor, keep within the legal speed limit.
- With a trailer connected, do not drive away unless the air pressure gauge is indicating at least 810 kPa (8.1 bar; 117 psi).

To prevent undue wear on the brakes, observe the following points:

- Make sure that the pressure hoses are connected.
- When driving downhill, select the same gear you would for driving uphill.
- Check the air brake on the trailer regularly to make sure that it is functioning correctly.

Checking Transmission Oil Level

Check oil level when oil is cold. If possible, check the oil level in the morning after the tractor has been standing overnight.

- Park JD 5620, 5720, 5820 tractor so that it is level.
- Apply handbrake (transmission in neutral).
- Lower draft links and front-mounted implements.
- Check the oil level at the sight-glass.
- Oil level must be between the two marks. If it is not, top up with oil at the oil filler neck.

Lubricating the Front Axle and U.j. Shaft

- Carry out this service after every ten hours of operation when working under very wet and muddy conditions.
- Lubricate the grease fittings on the front axle and u.j. shaft (only partially shown) using John Deere multi-purpose grease.
- Thoroughly clean all grease fittings prior to greasing. Replace damaged grease fittings immediately.

Check brakes

Shut off the engine and check that the brakes are operating properly:

- One at a time, press down on the left and right brake pedals (do this several times to each pedal). Distinct resistance should be noticeable at each of the two pedals. If no resistance can be felt at the pedals, see your service.
- Check to make sure the pedals do not settle to the end of stroke within 10 seconds after being applied. If leakage exceeds this rate or if one pedal settles faster than the other, see your service.
- Press both pedals down at the same time. Distinct resistance should occur at both pedals at roughly the same height. If the height at which resistance can be felt differs by more than 51 mm (2 in.), see your service.

Checking Neutral Start Circuit

5620, 5720, 5820 Tractors with PowrQuad transmission:

- Depress the clutch pedal.
- Move range shift lever to neutral.
- Move reverse drive lever to "forward" position.
- Turn key in main switch as far as it will go to the right. The starting motor must NOT turn over.
- Repeat the test in the "reverse" position.

5620, 5720, 5820 Tractors with PowrQuad Plus transmission:

- Move range shift lever to neutral.
- Move the reverse drive lever to "forward" or "reverse".
- Start the engine and wait 6-7 seconds. The "N" display must light up.
- Depress the clutch and engage any range. Gradually release the clutch pedal. The tractor must NOT start to move.

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