YJ03 · Air bag suspension
Checked first. The air pump motor needs it at the seat position, and the machine provides it.
Checked second. Air bag travel, compared with what the cab allows.
Checked third. Operator weight setting, lightest to heaviest operator.
Tractor and agricultural machine builders that specify a seat for a new operator station, and distributors and importers that supply replacement seats for tractors already in the field.
An air bag suspension with 80 mm of travel, a 175 mm fore-aft slide and a backrest from 35° to 170°. The overall size is 525 × 610 × 780 mm. The cover is black PVC or fabric.
The voltage information of your tractor, with the cab drawing or photos of the seat you are replacing. We reply with a confirmed model, the YJ03 parameter sheet and the YJ03 drawing.
Every published YJ03 value on one page. The values come from the parameter sheet and the YJ03 drawing.
Black PVC or fabric cover. Headrest, safety belt, document bag, armrest and turning mechanism are options.
| Suspension | Air bag |
|---|---|
| Suspension travel | 80 mm |
| Air pump motor | 24 V (marked on the drawing) |
| Operator weight setting | 50–130 kg |
| Fore-aft adjustment | 175 mm |
| Backrest angle | 35°–170° |
| Overall size | 525 × 610 × 780 mm |
| Headrest height adjustment | 120 mm, when a headrest is fitted |
| Cover | Black PVC or fabric |
| Options | Headrest, safety belt, document bag, armrest, turning mechanism (rotation) |
| Machines listed on the sheet | Tractor, seeder, agricultural machinery |
A figure that is not in the table is requested from the factory and arrives in the enquiry reply:
Three items decide whether YJ03 goes onto a tractor. They are checked in this order, and the first reply to an enquiry is built around them.
The air pump motor needs it, and it is the only one of the three items that sits outside the seat. We settle the supply first, because a model that has nothing to run on cannot be matched on the other two figures. The next section covers it in full.
The travel is the figure the cab is designed around. A machine builder takes the value from the operator-station specification. A distributor takes it from the label, the catalogue entry or a measurement of the seat on the machine. A seat with travel inside what the cab allows matches on this item. The travel of YJ03 is the air bag stroke of 80 mm, and the sheet, the drawing and the product catalogue state the same figure.
The air bag is set for the person who sits on it. A builder states the lightest and the heaviest operator the cab is specified for. A distributor states the range of the fleets it supplies. Both ends are compared with 50 and 130 kg.
An air suspension seat on a tractor depends on the machine in a way a mechanical seat does not. The YJ03 drawing marks the air pump motor as 24 V. The seat brings the pump, and the tractor has to bring the supply to the seat position. Nothing on the seat side can change the voltage of the machine.
Whether the machine electrical system provides 24 V at the seat position, and whether the wiring to that position is part of the cab design.
The supply, entered into the operator-station interface list next to the mounting data. A builder asks it once, at design stage, and puts the answer into the drawing package.
We confirm the model against what you sent, and list the points the factory still has to confirm.
For the voltage information of the machine and a photo of the underside of the old seat. If the old seat carried a pump and wiring, the photo shows where they sit.
The voltage information and the underside photo. A mixed workshop asks the question per tractor, because machines of different builds do not share one supply.
We confirm the model against what you sent, and list the points the factory still has to confirm.
For the voltage information of the machine and the underside photo. If the old seat carried no pump, the question moves to the machine: is there a 24 V feed at the seat position?
The voltage information of the machine and photos of the seat position. A mixed workshop asks the question per tractor, because machines of different builds do not share one supply.
We confirm the model against what you sent, and list the points the factory still has to confirm.
Two figures are not on the published material: the pump current draw and the connector form. We do not print them here. Send the electrical details of your machine and the factory answers each point in the reply.
If the old seat carried a pump and wiring, the underside photo shows where they sit. If it carried no pump, the same photo still shows the base, and the question moves to the machine.
Overall size, parameter sheet525 × 610 × 780 mm“without the power”Condition printed on the YJ03 drawing
The drawing shows what it shows. The YJ03 external drawing shows the front and side views, marks the air pump motor as 24 V, shows the turning mechanism as an option and lists the technical data. The drawing states that data under the condition above.
Read every dimension and travel figure from the drawing with that condition in view. The drawing does not print a second set of figures for the powered condition. Write that in the enquiry, and the factory states which figure applies to your build., write that in the enquiry, and the factory states which figure applies to your build.
The overall size on this page is the figure from the parameter sheet. Send your cab envelope, and the factory confirms it against the drawing before a sample is discussed.The drawing carries a table of general tolerances for linear dimensions.
| Dimension range | Step | General tolerance |
|---|---|---|
| over 3 to 6 mm | ±0.3 mm | |
| over 6 to 30 mm | ±0.5 mm | |
| over 30 to 120 mm | ±0.8 mm | |
| over 120 to 400 mm | ±1.2 mm | |
| over 400 to 1000 mm | ±2 mm | |
| over 1000 to 2000 mm | ±3 mm | |
| over 2000 to 4000 mm | ±4 mm | |
| over 4000 mm | ±5 mm |
This is the general tolerance printed on the drawing for manufactured linear dimensions. It is a drawing note, and it is not an inspection result. A builder reads it against the tolerances of the cab opening and the seat base, then decides whether a sample is needed.
Tractor operators turn toward the implement and sit through long stretches in the field. The adjustment ranges of YJ03 cover that work, and each one needs its own space in the cab.
The air bag stroke. Measure the free height under and above the seat position and compare it with the travel and the overall height of 780 mm.
The sheet gives the total. Measure the distance from the seat base to the pedals and levers, and to the rear wall of the cab.
The backrest sweeps through a wide arc. Space behind the seat has to allow the angle the operator will use, and the rear wall or a tool box sets the limit.
Where a headrest is fitted it moves up and down through 120 mm. Check the roof or the rear window line against the top position.
If the machine needs a rotating seat, say so in the first message. The option is part of the model description and changes what we check for the fit.
Send the cab dimensions at the seat position. We answer against them and name the figures that fall outside the range.
The YJ03 parameter sheet and drawing give overall size and technical data. They do not give the base hole pattern, so the pattern is requested from the factory with your enquiry.
3D scanning in our testing center is used to compare hole positions and frame dimensions. The result is returned as the figures on the model sheet. If the pattern on your machine differs, the factory states which modification closes the gap, and a change to the structure goes through the R&D center.
Hole pattern: requested from the factoryOn your seat base, measured or taken from the cab drawing.
The footprint of the old seat, if you are replacing one.
The rails or frame the seat sits on, with a photo.
An option goes onto YJ03 when the YJ03 sheet lists it.
Name the options in the first message, together with the cover. The reply gives the model with those options written into the specification.
Adjusts up and down 120 mm.
Listed as an option on the YJ03 sheet.
Listed as an option on the YJ03 sheet.
Listed as an option on the YJ03 sheet.
A rotation option, shown on the drawing.
Black PVC, or fabric. Name the cover in the first message.
The Application line of the YJ03 parameter sheet lists tractor, seeder and agricultural machinery. Send the make and model of the machine, and a photo of the seat position, and we reply with the match. We do not map YJ03 to further machine types beyond this line.
Listed on the YJ03 sheet.
Listed on the YJ03 sheet.
Listed on the YJ03 sheet.
For the full tractor range and the models next to YJ03, see tractor seats.
For measuring a seat base against a model, see the seat fitment guide.
Where each tractor model sits on the parameter sheet. Cells without a published value say so.
| Item | YJ03 |  KL03 |  YY08 |
|---|---|---|---|
| Suspension travel | 80 mm | 180 mm | 80 mm |
| Suspension | Air bag | Air | Not stated |
| Supply | 24 V | 24 V | Not stated |
| Operator weight setting | 50–130 kg | Confirmed with the factory | 50–120 kg |
YJ03 and YY08 share 80 mm of travel. YJ03 carries the air bag and a weight setting to 130 kg. KL03 is the longer-travel air model at 180 mm. The full side-by-side of the three is on the tractor seats page.
YJ03 is built on our own lines. Assembly puts together the suspension, the slide and the options you chose.
The cushion and the backrest are formed by foam molding.
The frame and base parts are precision stamped.
The frame is joined in the robotic welding station.
Suspension, slide and the options you chose go together.
Used on the seat frame at the design stage.
Used on frame dimensions and hole positions.
Used on the seat cushion. It records how pressure spreads across the cushion surface while a person sits on it.
Not published: how the air bag travel is tested. It is not on our published material, so we do not describe it here. The factory answers that question in the enquiry reply. No test values are published on this page, and we make no claim about service life. The MES system covers quality and delivery records for the whole process, and the factory can describe the route at a visit.
Tractor buildersTractor builders work with KL Seating through the company OEM and ODM programs. The starting set is the cab drawing, the supply voltage, the suspension travel and weight range the design needs, and the options and cover.
The program is described on the OEM and ODM seat manufacturer page.
Distributors and importersDistributors and importers supply YJ03 as a replacement seat, and can ask about wholesale and private label supply for the range.
Name the model, the options and your own marking in the first message.
Documents go out with the enquiry reply. If a figure on the drawing differs from the parameter sheet, the sheet governs, and the reply says which values are affected.
Every published value for the model, in one sheet.
With the general tolerance table and the 24 V pump motor mark.
Copies of the ISO 9001:2015, CE, RoHS and REACH certificates.
Copy the set that matches what you hold.
Tractor builder, new operator stationDistributor or refit shop, replacement seatSix pages continue from the YJ03 checks: the tractor range, the fitment guide, OEM and ODM, and three other seat models.
The reply names the model.
Send machine detailsTractor builders and distributors: put the supply voltage of the machine, your role and the seat photos in the first message to [email protected], or call +86 177 0272 7677. The reply names the model: we send the YJ03 parameter sheet and the YJ03 drawing with it.
