Lemken Rubin 9 service schedule

Cultivators and power harrows · Rubin 9: manual 175_3622 (2011). Rubin 12 KUA: manual 17510731 (edition 06)

Covers the Lemken Rubin 9 (9/250 U to 9/600 KU, mounted and folding) and Rubin 12 KUA (trailed) compact disc harrows.

Every maker's service job for the Lemken Rubin 9, 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 Rubin 9 for free

Versions: Rubin 9 U / KU (mounted); Rubin 12 KUA (trailed, air brakes)

Service intervals

Job	When
Re-tighten bolts after commissioning	every 2 hours
Daily check: hoses, safety equipment and discs	every 10 hours
Greasing (folding joints, overload bearing, trailer joints)	every 50 hours or every year
Roller scrapers	every 100 hours
Replace hollow discs	every year
Air brake checks (Rubin 12 KUA)	every year
End-of-season lay-up	every year

Service jobs and parts

Re-tighten bolts after commissioning

Frame · every 2 hours

Lemken says to retighten all bolts and nuts within the first 2 hours, then check weekly. Wheel nuts are on the same list.

Step-by-step

Tighten all bolts and nuts to the torque table in your handbook, including the wheel nuts.
Secure with thread locker where the handbook says so.
Repeat the check once a week during the season.

Tools: Torque wrench, Socket set

Daily check: hoses, safety equipment and discs

Frame · every 10 hours

Lemken's daily check is for hydraulic hoses, safety equipment and the soil-working tools. Hoses must be replaced 6 years after manufacture.

Part	Qty	Notes	Part number
Hydraulic hose	1	Lemken-approved only. Check your handbook	check your handbook

Step-by-step

Look at the hydraulic hoses for damage and leaks and replace any damaged or over 6 years old.
Check that the safety equipment works.
Check all discs and soil-working tools for damage and wear and replace anything damaged.
On the Rubin 12 KUA, also check the tyres for damage and wear and the air pressure.

Tools: Torch, Rags

Greasing (folding joints, overload bearing, trailer joints)

Lubrication · every 50 hours or every year

The Rubin 9 chart is greased every 50 or 100 hours and before and after a winter break. The Rubin 12 KUA has a longer list of points on a 50 and 100 hour chart. Use Olistamoly 2 grease or an equal.

Part	Qty	Notes	Part number
Olistamoly 2 grease	1	Or an equivalent high-grade grease (Lemken)	check your handbook

Step-by-step

Park on level ground, stop the tractor, take the key out and apply the parking brake. Support anything raised.
Rubin 9: grease the overload element bearings, the flap hinges (four side sections) and the folding cylinder bolts at the intervals on the chart.
Rubin 12 KUA: grease the folding cylinder pins (6 points), trailer joints (10), braking axle (2), pivot bearing, ball coupling and drawbar eye on the 50 or 100 hour chart in your handbook.
Grease again before and after a winter break and coat cylinder rods with acid-free grease.

Tools: Grease gun, Rags

Roller scrapers

Wear parts · every 100 hours

Scrapers keep the roller clear. The gap depends on the scraper type: heat-treated 0.0 mm, armoured or carbide 0.1–0.5 mm, rubber ring roller 8–12 mm.

Part	Qty	Notes	Part number
Roller scraper	1	Genuine Lemken, per roller type. Check your parts book	check your handbook

Step-by-step

Loosen the setting nut and set the gap to the table in the fluids and specs lists for your scraper.
Tighten the nut again (46 Nm on a rubber ring roller; 80 Nm on a trapezoidal packer roller).
Turn the roller a full turn: the scrapers must not touch the roller casing in any position.
Replace any scraper that is worn thin (on a flex ring roller, when down to 5 mm).

Tools: Spanners 19 mm and 24 mm, Feeler gauge

Replace hollow discs

Wear parts · every year

Worn hollow discs can have sharp edges and a worn disc no longer cuts or turns the soil. The disc bearings are sealed and need no grease, so keep dirt out of the bearing flange when a disc is off.

Part	Qty	Notes	Part number
Hollow disc	1	Genuine Lemken, per position. Part number: check your parts book	check your handbook
Self-locking nut	6	New nuts every time, per disc. Check your handbook for number	check your handbook

Step-by-step

Unfold both side sections fully, raise the implement and secure it so it cannot drop.
Clean the disc and bearing flange so no dirt can get into the bearing.
Undo the six self-locking nuts and take the disc off the flange. Clean the flange face.
Fit the new disc with new self-locking nuts. Tighten to 46 Nm (Rubin 9) or 80–100 Nm (Rubin 12). Wear gloves: worn discs are sharp.

Tools: Torque wrench, Gloves, Support blocks

Air brake checks (Rubin 12 KUA)

Brakes · every year

On the trailed Rubin 12 KUA, Lemken says to drain the air tank weekly, clean the coupling-head filter and have the brakes serviced by a specialist workshop every year.

Step-by-step

Weekly: pull the drain valve chain to drain condensation from the air tank.
Clean the filter in the yellow coupling head: press in the plug, turn it 90°, remove the plug, spring, screen and disc, clean and blow out the screen and refit.
Once a year the braking system gets maintenance by a specialist workshop.

Tools: Allen key

End-of-season lay-up

Storage · every year

Lemken's lubrication charts give a set list for before and after winter: grease the guide pins, coat the rods with acid-free grease and the bare concave disc surfaces.

Part	Qty	Notes	Part number
Acid-free grease	1	For cylinder rods and bare disc surfaces	check your handbook

Step-by-step

Clean the machine. Keep the washer away from bearings.
Grease the points marked for before a winter break.
Coat the cylinder rods and bare concave disc surfaces with acid-free grease to stop rust.
Push the protective caps on the hydraulic couplings and the electric connectors.

Tools: Pressure washer, Grease gun

Oils, fluids and capacities

System	Oil or spec	Capacity
Grease points	Olistamoly 2 grease or an equivalent high-grade grease (Lemken Rubin 12 manual)
Cylinder rods (winter storage)	Acid-free grease to DIN 51 502

Specifications


Disc bearings	No lubrication points on the discs. The bearing flange is exposed when a hollow disc is removed: keep dirt out
Hollow disc nuts (six per disc)	Rubin 9: 46 Nm self-locking nuts. Rubin 12: 80–100 Nm, new self-locking nuts each time
Wheel nuts, Rubin 9	M18 × 1.5 290 Nm; M20 × 1.5 380 Nm; M22 × 1.5 510 Nm; M12 80 Nm; M14 125 Nm
Scraper settings	Toothed packer roller: heat-treated scraper 0.0 mm; armoured or carbide scraper 0.1–0.5 mm; rubber ring roller 8–12 mm (nut 46 Nm); trapezoidal roller 0.1–0.5 mm (nut 80 Nm)
Hydraulic hose life	Replace 6 years after the date of manufacture
Pressure washing	Keep the washer away from the bearings

Known problems

Dirt in the disc bearing flange

When a hollow disc is off, the bearing flange is exposed. Clean first and keep dirt out.

Scraper clearance by roller type

Different rollers want different scraper settings: do not use one setting for all.

Parts list with genuine part numbers

Wear parts per partao.com fitment (Rubin 9/10/12)

Wear parts

Part	Part number	Qty	Notes
Disc blade D590 x 6, corrugated	3490051	per disc	Wear part; genuine Lemken per partao, fits Rubin 9, 10, 12, Heliodor 9
Concave disc D510 x 5, 4 holes	34910027	per disc	Wear part; Lemken number per partao listing (quality 'OEM Quality'), fits Rubin 9, 10, 12

Sources

Open Farmyard Workshop