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Change Mower Gearbox Oil

20:43
23:43
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At 20:43 in

How to service a tractor......with a disappointing ending 😬...uh oh!! PROBLEM!

What happens here

If you have a bush hog or similar PTO-driven implement, it will have a gearbox that requires oil changes. Locate the drain plug at the bottom of the gearbox and the fill/level plug on the side or top. Place a drain pan underneath the gearbox. Use a wrench to remove the drain plug and allow the old gear oil to drain completely. Once drained, reinstall and tighten the drain plug. Remove the fill plug. Using a funnel with a flexible hose, slowly pour 80W-90 gear oil into the gearbox through the fill port until it starts to seep out of the fill hole, indicating it's at the correct level. Reinstall the fill plug.

Goal: Replace the gear oil in the bush hog's gearbox.

Tools and materials

  • Drain Pan — Collecting old gear oil
  • Funnel with Flexible Hose — Adding new gear oil
  • Rag — Wiping up spills
  • Rubber Gloves — Protecting hands
  • Wrench — Removing and installing drain/fill plugs
  • Gear Oil AutoZone 80W-90 Gear Oil — Lubricating the gearbox