Keenan MechFiber 270+ / 320+ / 380+ / 400+ service schedule

1. Stop the tractor, remove the PTO and park the machine level.
2. Open the front left cover and look at the oil level window. The level should be midway.
3. Top up through the filler if low. On 270+ and 320+ machines with an automatic oiler, check the reservoir and refill it.
4. Do not use grease on the chains: it blocks the oil getting into the chain pins.

Tools: Funnel, Rag

1. Remove the PTO and park level.
2. Grease the two PTO universal joints and smear grease on the sliding half shafts. See the PTO maker's booklet for the exact points.
3. Grease the input, idler, rotor and auger bearings and the chain tensioner pivots (400+: points 1 to 12 and 24 to 34 in the manual), through the grease manifold where fitted.
4. Grease the door's four hydraulic cylinder fittings and smear food-grade grease on the door slide plates.
5. Grease the hitch pivot tube (swivel hitch) and the axle brake rod, brake arm and spring pivots.

Tools: Grease gun

1. Remove the PTO and open the drive covers.
2. Look for worn or stiff chain links, a bent pin or a chain jumping on a sprocket.
3. Check each tensioner spring. On the 400+ primary chain, set the spring to 220 mm between mounting centres with the adjuster bolt, then retighten the locking nuts.
4. Grease the tensioner pivots and refit the covers.

Tools: Spanners, Tape measure

1. Tighten the wheel nuts diagonally to the torque in your model manual.
2. On tandem axles, check the U-bolt torque.
3. Check every nut and bolt including bearing nuts for tightness.
4. Check the tyres for damage and set the pressure from the table in the manual.

Tools: Torque wrench, Tyre gauge

1. Park level and remove the PTO. Put a tray under the oil bath drain bung and open it.
2. Let the oil drain fully, then wash out dirt and old oil with paraffin and dry the bath.
3. Close the bung and refill with new chain-bar oil to the middle of the sight window.
4. Run the machine for 5 to 10 minutes, then recheck the level.

Tools: Drain tray (35 L), Paraffin and brush, Funnel, Spanners

1. Support the machine on stands and remove the wheel and hub.
2. Wash and inspect the bearings and seals. Replace what is worn.
3. Repack with grease, refit and set the end float as your handbook says.

Tools: Axle stands, Torque wrench, Bearing puller

1. Grease each tine pivot.
2. Check the tines for looseness and the buffers for cracks, splits or wear.

Tools: Grease gun

1. Check the PTO shaft on the machine carries the correct bolt for the model and input speed.
2. Never fit a higher grade bolt than the table gives.
3. Carry at least two spare bolts in the cab.

Tools: Spanners, Spare shear bolts

1. Look at the knife and body blade edges. Dull, bent or missing blades need work.
2. Have the machine's blades sharpened or replaced by an authorised service agent. The 400+ body blades use M10 cup-head bolts, grade 8.8.
3. Body blade numbers differ by thickness and model: check your handbook or parts book.

Tools: Grinder or sharpening stone (agent), Torque wrench

1. Wash the whole machine, including the mixing chamber and rotor.
2. Grease and oil every weekly lubrication point (see the weekly task).
3. Open the drain bung in the mixing hopper.
4. Remove the weigh box. Lightly grease the load cell cable connector end and put it in a plastic bag.
5. Check tyre pressures and store the machine under a cover or sheet.

Tools: Pressure washer, Grease gun