Archive for John Deere Technical

John Deere PlowNo matter what tractor you have, the initial tire setting for a 12 inch plow is 23 1/2 inches from the center of the draw bar of the tractor to the inside of the right rear tire. 14 inch plow is 25 inches and 16 inch is 27 inches. You can compensate a little if you are off on these measurements by sliding the plow A-Frame on the plow crossbar.

Once you get to the field, lower the plow and make 1 pass, plowing about as deep as you need. Then the second pass, let your right rear tire drop down into the furrow, lower your plow and start the second furrow. Now, get off the tractor and adjust your right leveling crank assembly on your tractor 3 point until the plow is level with the field, left to right. Next adjust your top link until your plow is level with the field front to back.

Now, plow this furrow to the end and on the 3rd furrow fine tune your plow again by repeating the last procedure. All plows should have cross hitch bars that have the right pin down and the left pin upward (standing behind the plow looking forward). This offset is approx 3-4 inches and is built into the plow.

In extra hard plowing conditions, you can loosen you cross hitch bar clamps and rotate it maybe 10-15 degrees to the back and if the plowing is easy then you can rotate the cross hitch bar the opposite way 10-15 degrees. By doing this final adjustment, the plow will do its best job with less strain on the tractor.

When a plow is set correctly, It will follow the centerline of the tractor perfectly without your riding the brakes and it completely turn over the soil.

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It seems a few owners haven’t gotten their new 1 series tractors equipped with either the 54 or 60D mower setup correctly. This will explain how to do it yourself for the best possible mower performance! Most if not all of this information can be found in the John Deere Owner’s Manuals for the mower and the tractor. The procedure is the same for the 54″ and 60″ decks, mechanical or independent lift. There is one additional step for mechanical lift equipped tractors. More on that later…

First you’re going to need a few tools. A 1 1/8″ wrench, a tape measure or better yet the JD mower leveling gauge p/n AM130907. The tractor needs to be parked on a smooth and level surface.

-This step is for mechanical lift equipped tractors only-  To adjust MMM rockshaft lift strap (located between 3PH rockshaft and MMM rockshaft behind left rear wheel) you remove the mower and remove the hair pin clips and pins (D) to disconnect the lift links (E) from both lift arms. Raise the 3PH fully. Rotate mower cut height knob to lock position. Remove left rear wheel. (You might be able to skip this if you can reach the 3 bolts on the lifting strap.) Loosen the three bolts on the lift strap. Rotate mid mount rockshaft (B) forward until there is a small gap (A) between the the height cam (C) and mid mount rockshaft (B). Move lift strap forward to the end of travel slot and tighten the three bolts. (I’d use 1/16″ to 1/8″ for a goal for this gap.) Reinstall left rear wheel and mower.

First you want to adjust the side lift links (E) for maximum lift. To do this you’ll want to start the tractor and raise the mower all the way. Rotate the mower height adjustment knob to the lock position. Now look at the mower height cam (C) above the left rear mower latch. It’s just behind the left rear tire. You want to see a gap at “A”. I’ve found that a gap of about 1/8″ is perfect.

To get this gap set right you first need to unlock all anti-scalp wheels, turn the mower height adjustment knob to the “install” position, and then lower the deck to the ground. Then remove the hair pin clips and pins (D) and adjust both links (E) up equally. Now you need to raise the mower fully and check for the gap (A) between the height cam (C) and the rock shaft arm (B). Repeat this process until you get close to 1/8″.
Here is the gap on my tractor.

The next picture shows the mower resting on the height cam “lock” position.

Now we are going to adjust side to side level. Set your mower height adjustment knob to your desired mowing height and lower your mower. Measure your blade height and adjust the same side links to achieve level within 1/8″ to 1/4″. I was able to achieve the same measurement on both sides. I usually mow at 3″ and marked the scale accordingly.

   

After you’ve set level side to side, recheck your maximum height setting. Here is my tractor at full travel, mower resting on the lock position, and install position.

To adjust front to rear level we’ll need your mower at your desired mowing height. Measure a blade from the front and at the rear. It doesn’t matter which blade. The optimal setting is 1/8″ to 1/4″ front lower than the rear. This reduces friction on the rear of the blades and make the front of the blade do all of the cutting and discharging. The front draft arms will adjust front to rear leveling. First lower the deck to the install position and loosen the rear draft arm nuts with the 1 1/8″ wrench. (The nuts closest to the mower.) It may help to drive the tractor off of the mower just to loosen the rear nuts. Raise the mower back to the desired mowing height. Tighten the front nuts the same amount (it helps to count flats) to raise the front of the deck. Loosening lowers the front of the deck. Double check your front to rear level once you got the draft arm adjustment nuts tight.

The Auto-Connect carrier bearing needs to be adjusted for easy connection as well. If you remove the mower it will be easier. Lower the mower/mower lift arms all the way to the install position. There is an adjustment bolt under the bearing to adjust for between perpendicular to the ground to leaning ever so slightly forward. I found this makes for the best connection.

Now it’s time to go mow your yard and enjoy your tractor!

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John Deere Parts is a comprehensive parts lookup and database covering all John Deere tractors, equipment and implements going back to 1975. This system is the same internet site used at the parts counter at the dealerships. The system allows you to look up parts by model numbers, part numbers or partial part numbers. It is found on John Deere’s website under parts at JDParts .

In order to use JDParts you are required to signup using a username and password. This is to ensure your privacy and security of your orders and personal information. After registering and you have located your item, just add it to the “Shopping Cart”. Now you can get a price, see inventory, or even order it directly through your specified dealership for easy pickup. You may change your designated dealership at any time should it be required or needed. For example, you can change to another local dealer to view their inventory on a specific item and then change back to your regular dealer. You can also find what equipment a part is used on as a part can cross over several models. Once you are approved to use the system it is highly recommended to take the time to get comfortable getting around in the system as there is a huge amount of information to sift through. The “Help” section contains all of the detailed information on using JDParts such as, Frequently Asked Questions, Learn to use JDParts, Finding Parts, Using the Shopping Cart and Ordering Parts, Doing Business with your Dealer, and Updating your Profile.

JDParts is not just a part locator; it includes maintenance items such as oils, filters, coolant, greases, batteries and home maintenance kits. To which you can also order through the JDParts system. The system also contains some equipment accessories and data sheets of chemicals, oils, and greases.

This information is most easily obtained by the “Key Word” search function. Probably the most useful and powerful feature of the system is it displays the parts list breakdown of every machine subassembly along with any available options. But, the big bonus is the detailed exploded diagrams. You can locate and see exactly how the part fits into the assembly to aid you in maintenance and repair of your equipment.

Now let’s discuss what the system can not do. You cannot source or price what John Deere defines as “Whole Goods” through this parts system since these are not parts, but rather whole options or accessories like a Mid Mount Mower or Front End Loader for example. These items will have to be priced and sourced through the sales department at a local or online dealer. You may however obtain a list price of a “Whole Goods” item through the “Build Your Own” function in another section of the John Deere website. You also can not buy directly from the website; all sales are completed through an authorized dealership specified by you.

Here is a PDF showing you how to use JD Parts

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I completed the initial 50 hour service on my 1026R today and wanted to share some notes with you guys.

Tools required

-Flat tip screwdriver
-10mm socket and wrench (engine side panel removal-optional)
-pliers
-13mm wrench
-6mm Allen wrench
-oil filter pliers
-transmission oil filter p/n LVA16054
-4 Gallons of low viscosity Hy-Gard (J20D) fluid
-a LARGE drain pan capable of at least 4 gallons. Bigger if you have it.
-3/4″ socket for removing wheel
-floor jack and jack stand
Tools Used
I also changed the engine oil so you’ll see the 17mm wrench and oil filter p/n M806418

The 50 hour initial servicing of the trans is pretty straight forward. You need to remove the left rear tire.


Drain the trans by removing the drain plug with the 13mm wrench. Lower the mower lift arms to get more room to access the trans filter. My filter was TIGHT. I needed the filter pliers to loosen it. I partially filled the new filter and lubricated the gasket prior to installing it. Next the oil pump suction screen need to be removed. This is very important. The suction screen is at the bottom rear of the trans. Remove the suction hose clamps and remove the hose. This is what you’ll see.

Remove the Allen bolt and pull the screen assembly out of the trans. Here’s what mine looked like.

Don’t forget to clean the magnet inside the screen!

Remember how much oil is in the transmission?

A couple of tips.- Remove the dipstick (engine or trans) during draining or filling to let it breathe and prevent surging or bubbling in your funnel or drain pan. I purchased a 5 gallon bucket of low-vis Hy-Gard as it was cheaper and I have some left over. Lower your 3PH for a more complete oil change. Use a jack stand- ’nuff said. Engine oil change is so straight forward there’s nothing to really note. Do not overfill. It’s much easier to add than remove a little oil. The trans level will come up all of a sudden, so sneak up on it. I used this opportunity to grease all of the zerks for a complete service. The picture of the trans suction screen says it all. Don’t skip this important service.

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Tractor 3pt Hitch Draft Control Types

First we must determine the meaning of the word draft.

Draft = Depth

Draft = Pulling force

For the purpose of this article it is important to note that a tractors draft control is NOT a depth control system. It is a LOAD control system controlling the load placed on the tractor by an implement and it is set by the operator by the movement of the 3pt hitch hydraulic rockshaft control valve or thru mechanical or electrical movement of the rockshaft valve. Now we can see that this lever also controls/limits the depth an implement may go into the ground but this control of depth is affecting the vertical load placed on the rear of the tractor. As the depth of an implement increases so does the draft (pulling/vertical load) increase until horsepower or traction has reached its limit and the tractor stalls or spins.

For our John Deere tractors they use three types of draft control systems:

Select Control Type: This is the most basic system that John Deere uses to control the 3pt hitch system. This type uses a rockshaft control lever that has an up, down and neutral position.  Implement positioning is controlled by how quickly an operator can return the lever to the neutral position. You push the rockshaft control lever forward to lower and back to raise an implement. The middle position is neutral and on newer tractors the control lever will return to neutral automatically as soon as the operator releases the control lever from up or down positions while some older tractors the operator had to return the lever to neutral manually. With this basic system an operator may get the implement in the same position 1 out of 100 times. This type is neither precise nor accurate.

Position Control Type: This type of control system involves a rockshaft control lever that has a full up and full down position as well as the ability of stopping at any point in-between. This JD type usually uses a scaled strip next to the control lever with a moveable stop so an operator may raise and lower the implement to the predetermined “stop” position. If you were looking to have your plow, box blade or mid-mount mower raise and lower by the 3pt hitch to the same position this would be the control type you would want to select. It should be mentioned that the precision and accuracy of the position control is not mentioned and this is due to lack of data but the precision appears to be relatively high.

Load Sensing Control Type: Load-sensing types are normally used in conjunction with the position control type and uses mechanical or electrical sensors to control the positioning of the 3pt arms as load forces increase or decrease. Load-sensing is found on John Deere tractors that are capable of larger ground engaging equipment, as the load-sensing was originally designed for plowing implements. When used with position control the load sensing controls will raise the 3pt arms when the draft increases and lowers them back to the position control set stop point when the load decreases.

Some historical types of load sensing used the top link of the 3pt hitch as the control point. The top link had a coil/leaf/torsion spring that would attach mechanically to the rockshaft control valve and allow for raising or lowering of the 3pt arms based on the load conditions placed on the top link. This mechanical-hydraulic system was very popular. Another variation of this same system mechanically attached to the lower arms verses the top link. This change was more prevalent when farmers were switching from single plows to multi-furrow plow setups. Still there were other older systems that monitored rear axle torque to raise and lower the 3pt arms and ones that used a separate wheel system attached mechanically to the rockshaft control valve to control the 3pt arms.

Newer load-sense control types use electro-hydraulic systems to control the movement of the 3pt arms. One type of the electro-mechanical systems uses electrical sensors the are inside the rockshaft cover or outside and connected to a mechanical lever that attaches to the lower 3pt arms and the control of the rockshaft control valve can be mechanically controlled or with electronic solenoids. Another electrical system uses all electronics to monitor the load on the tractor and move the 3pt arms. It does this with electrical sensors on the 3pt arms or rockshaft and sensors that monitor the speed of the tractor (with the aid of radar, GPS, or axle speed sensors) and either sensor input can cause the movement of the 3pt arms. The electronic systems are all controlled with the aid of an ECU that can monitor all the inputs and control the 3pt arms with no operator input once the system is set and activated.

 

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