Every mixer wears. The question is what goes first, how much it costs, and whether you planned for it. Knowing your mixer wear parts saves you from surprise bills and long waits for parts.
What wears first
Knives. The fastest wearing part on most vertical mixers. How fast depends on what you process and how dirty it is.
Auger flighting edge. The leading edge of the auger wears from constant contact with feed. Some machines have replaceable wear edges.
Tub floor and liners. Feed scours the floor, especially near the auger. Wear liners protect the main structure.
Restrictors and counter-knives. These take wear from forage being forced against them.
Discharge door slides and conveyor. Doors, chains, belts and rollers wear with every unload.
Bearings and seals. Auger and gearbox seals, wheel bearings and PTO joints.
Shear bolts. Designed to break to protect the driveline. Keep spares.
Tires. Especially on heavy machines and rough yards.
What speeds up wear
- Dirt, sand and stones in forage.
- Lots of straw and dry hay processing.
- Overloading.
- Poor greasing.
- Acidic, wet feeds against bare steel.
Planning costs
Ask your dealer for a list of common wear parts and their prices. Estimate how often you’ll replace each based on your rations. Put it in your budget as a cost per load or per year.
Making parts last
- Keep knives sharp. Dull knives make everything else work harder.
- Rotate knives and liners where possible.
- Grease on schedule.
- Keep stones and metal out of the tub.
- Clean out feed buildup.
Modular parts help
Parts that bolt on and off save time. Our V2 modular knife system lets you swap only what’s worn.
What wears first
- Knives: first, especially on bale and straw rations.
- Counter-knives: wear alongside auger knives.
- Auger flighting edges: wear slowly, faster on sandy feed.
- Floor: wears around the auger base.
- Tub walls: wear where feed rubs most.
- Door seals and conveyors: wear with use.
Signs of wear
- Longer mix times.
- Feed not lifting or rolling.
- Uneven particle length.
- Feed leaking at doors.
- Thin spots or holes in the floor or walls.
Planning replacement
Check wear parts at each service. Note when they were changed and how many loads they did. That tells you when to order next time.
Costs
Wear part prices depend on the machine and your dealer. Ask for a price list when you buy. Factor these into running costs.
Reducing wear
- Keep sand and stones out of feed.
- Don’t overprocess.
- Keep knives sharp so the auger isn’t working harder.
- Clean out feed buildup that causes corrosion.
Keeping spares
Knives and bolts on the shelf. Other parts ordered ahead when you see wear.
Quick questions
Do I need to replace the whole floor? Not always. Wear plates or patches can extend life. Ask your dealer.
Can I hardface the auger edge? Some do. Ask the dealer first so you don’t upset balance or warranty.
What’s the best way to cut wear? Clean feed. Sand and stones wear steel fast.
From the show floor
Every year at the Expo somebody shows me a photo of a worn-through floor and says it happened fast. Then we talk and it turns out the silage pad is gravel and the loader scoops some every load. Fix the pad and the mixer lasts.
Where to start this week
Shut down, lock out and look inside the tub with a good light. Check knives, counter-knives, flighting edges, the floor around the auger and the walls where feed rubs. Take photos and date them. Do it again in three months. Comparing the photos shows you exactly how fast your machine wears on your ration, and that’s the best way to plan parts and budget.
Quick questions
Should I buy wear parts from the dealer? Genuine parts fit right and protect your warranty.
Which part costs most when ignored? The floor. Once it goes, it’s a big repair.
How do I budget for wear? Track part changes and loads for a year. Then you’ll have your own cost per tonne.
Can wear affect the scale? Indirectly. Feed buildup and damaged cables cause more scale trouble than wear.
Keep a shelf stocked
A spare set of knives, shear bolts and common seals. That’s often the difference between a 20-minute job and a two-day wait.
LEO heavy-duty mixers are built with wear in mind. Ask your dealer about parts availability before you buy.
Bottom line? Wear parts are a running cost, not a surprise. Budget them.
