Kuhn Axis 20.1 / 30.1 / 40.1 / 50.1 W spreader service schedule

Fertiliser spreaders · Axis .1 series

Every maker's service job for the Kuhn Axis 20.1 / 30.1 / 40.1 / 50.1 W spreader, counted in hours, with the oils, filters and parts each one needs. Add your implement to Farmyard Workshop and it works out what's due from your hours and dates, and keeps the service history.

Track your Axis 20.1 / 30.1 / 40.1 / 50.1 W spreader for free

Versions: Axis 20.1 (1,000 L); Axis 30.1 / 40.1 (1,200 L); Axis 50.1 W (2,000 L)

Service intervals

Job	When
Bolted connection check	every 30 hours or every year
Wear parts, vanes and disc hub check	every year
Agitator drive check	every year
Calibration test	every year
Cleaning and lubrication	every year
Gearbox oil change	every 10 years

Service jobs and parts

Bolted connection check

General · every 30 hours or every year

Kuhn: on a new spreader check all bolts every 30 hours, as vibration loosens them early on, and always before the season. Weigh-cell bolts (W models) are 300 Nm before each season.

Part	Qty	Notes	Part number
Self-locking nuts	1	New whenever a part held by them is refitted	check your handbook

Step-by-step

Check every bolted connection is tight.
W models: tighten the two bolts on each weigh cell and the tie rod bolt to 300 Nm.
Use new self-locking nuts on anything refitted, such as vanes.

Tools: Spanners, Torque wrench (to 300 Nm)

Wear parts, vanes and disc hub check

Discs · every year

Kuhn lists the vanes, agitator head, outlet and hydraulic pipes as wear parts: replace them if worn, bent or holed, or the pattern goes wrong. Vanes must match the disc and should be changed by a dealer.

Part	Qty	Notes	Part number
Spreading blades (pair)	1	Genuine Kuhn numbers per Partao listings; which blade is left- or right-hand and the exact Axis version are not stated, so check your parts book before ordering	R3050162 / R3050058
Spreading vanes	1	Must match the disc type and length printed on them; check your handbook or dealer	check your handbook

Step-by-step

Take off the spreading discs.
Check the vanes, agitator heads and outlets for wear, deformation or holes.
Check each disc hub is centred under its agitator within 2 mm, and the gap from the hub top to the agitator bottom is 136.5 mm ± 2 mm. Call the dealer if not.
When fitting vanes, check the type and length marked on the new one match the old one.

Tools: Straight edge, Rule

Agitator drive check

Hopper · every year

The agitator should turn at 15–20 rpm at 540 PTO rpm with a full hopper. Outside that range, check it for wear. With an empty hopper it may not reach speed even when sound.

Step-by-step

With the tractor off, key out and the spreader on the ground, open the hopper grid with the special tool.
Check the agitator heads and connecting rods for wear and that both turn the same way as their discs.
Check the grid interlock works. Close and lock the grid before running.

Tools: Stopwatch

Calibration test

Calibration · every year

Kuhn: run a calibration test before first use, when the fertiliser changes, or when its quality changes (damp, dusty, broken grains). Do it with the PTO on, standing or over a test run, on one side with both discs off.

Step-by-step

Work out your true speed: drive the half-full spreader 100 m in the field, time it and read the speed off the calibration calculator.
Close the slides, stop the tractor and take the key out. Loosen the cap nuts with the adjusting lever and take off both discs.
Set the drop point to 0. Fit the chute under the left outlet and set the slide stop from the chart.
Run the PTO at the chart speed and open the slide for the chart time. Weigh the fertiliser and compare with the target. Adjust and repeat.
Wear goggles. Q models do the test through the control box.

Tools: Calibration chute (stowed behind the disc guard), Bin holding at least 25 kg, Scales, Stopwatch

Cleaning and lubrication

General · every year

Kuhn recommends washing the spreader with a gentle water spray straight after each job, then treating it with anti-corrosion agent when dry, especially the vanes and stainless parts.

Part	Qty	Notes	Part number
Anti-corrosion agent	1		check your handbook
Grease, graphite grease, oil	1		check your handbook

Step-by-step

Fold up the hopper grids. Clean the outlets and slide guides from below only.
Never aim a high-pressure jet at decals, electrics, hydraulics or slide bearings.
When dry, treat with an environmentally safe anti-corrosion agent.
Grease the disc hubs and lower link bearings, put graphite grease on the metering slide pivots, and oil the drop point adjustment and agitator joints.

Tools: Hose, Grease gun, Oil can

Gearbox oil change

Gearbox · every 10 years

Kuhn: the gearbox is lubricated for life in normal use, but change the oil after 10 years, sooner if you spread dusty fertiliser or wash the spreader often. There is no filter.

Part	Qty	Notes	Part number
Gear oil	1	CLP 460 (SAE 140 GL-4); ≈5.5 L (20.1/30.1/40.1) or ≈10.5 L (50.1 W). Aztec Oils match: TRANSMATEC EP-4 140	check your handbook

Step-by-step

Stop the PTO and tractor and take the key out.
Tilt the spreader sideways about 200 mm and put an 11 L tray under the drain screw.
Undo the drain screw, let it drain fully and refit it.
Level the spreader. Open the filler and check screws and fill with SAE 140 GL-4 until oil reaches the lower edge of the check hole.
Refit both screws. Never mix oil types.

Tools: Drain tray (11 L), Spanners, Funnel

Oils, fluids and capacities

System	Oil or spec	Capacity
Gearbox	CLP 460 DIN 51517 (SAE 140 GL-4), e.g. Shell Omala 460	≈5.5 L (Axis 20.1, 30.1, 40.1); ≈10.5 L (Axis 50.1 W)
Grease points	Grease; graphite grease on metering slide pivots

Specifications


Working width	Axis 20.1: 12–28 m; 30.1/40.1: 12–42 m; 50.1 W: 18–50 m
PTO speed	450–650 rpm (optional 750 rpm gearbox, max 900)
Agitator speed	15–20 rpm at 540 PTO rpm
Disc hub to agitator	136.5 mm ± 2 mm; centred within 2 mm
Weigh cell bolts (W)	300 Nm
Max hydraulic pressure	200 bar

Known problems

Axis .2 and later

This entry is from the Axis 20.1–50.1 W manual. Later models differ; check your handbook.

Repair guides

Uneven spreading and striping (Moderate, 1–2 hours plus a test): Stripes in the crop, too much fertiliser in the tractor wheelings or in the overlap, or uneven spread across the bout.
Hopper emptying unevenly: bridging and agitator faults (Moderate, 1–2 hours): One side spreads more than the other, one side of the hopper empties faster, fertiliser feed to a disc is irregular, or an agitator does not turn.
Metering slides not opening, slow or uneven (Moderate, 1–2 hours): A metering slide will not open, opens slowly, or the two sides deliver different amounts at the same setting.
Blocked outlets and discs not turning (Easy, 30 minutes to 1 hour): No fertiliser from one side, outlet packed with lumps, leaves or bag scraps, or the discs do not turn or stop suddenly after switching on.
Spreading disc hub position and vane replacement (Specialist, 1–2 hours to check): Spread pattern wrong after a knock, a disc hub sits off-centre under the agitator, or worn, bent or holed vanes.

The full step-by-step guides are in Farmyard Workshop once you add your implement.

Parts list with genuine part numbers

Wear parts per partao.com fitment list (Axis 20.1/30.1/40.1/50.1)

Wear parts

Part	Part number	Qty	Notes
Spreading blade ZSB 900 P	R3050162	per blade	Wear part; source fits Axis 20.1, 30.1, 40.1, 50.1 (and .2, H versions)
Spreading blade ZSB 900 L	R3050058	per blade	Wear part; source fits Axis 20.1, 30.1, 40.1, 50.1 (and .2 versions)

Sources

Open Farmyard Workshop