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John Deere 85G – 500 Hour Service Interval Tasks Part 7

Heavy-duty mechanic leans on a John Deere 85G mini excavator.

If you’re doing this service yourself, visit FortisHD to purchase a service kit with every filter you need, or visit Tekamo HD to hire an expert service technician.

In the sixth post of this series, we serviced the final drive of the 85G Excavator. Check out our previous post about changing the final drive oil to catch up.

In this final post, you’ll learn how to flip over the cutting edge to complete the 500-hour service interval on the 85G Excavator.

Do you prefer to see a video tutorial instead?

Need to save time? The following table shows every filter you need for the complete 500-hour service interval:

Item OEM Part Number
Aftermarket equivalent
BaldwinDonaldsonWixBlumaq
Hydraulic Return Oil Filter 4450002 PT9443N/AN/AN/A
Hydraulic Breather Filter 4437838 PA5316N/AN/AN/A
Engine Oil Filter MIU800650 B161-SP50205151568N/A
Fuel Filter MIU805005 BF9910P553995N/AN/A
Water Separator Filter MIU802421 N/AN/AN/AN/A
Water Fuel Separator Housing + Plastic Bowl MIA885254 N/AN/AN/AN/A
Pilot System Oil Filter 4630525 N/AN/AN/AN/A
Primary Engine Air Filter FYD00001541 N/AN/AN/AN/A
Secondary Engine Air Filter FYD00001327 N/AN/AN/AN/A
Cab Fresh Air Filter 4S00640R N/AN/AN/AN/A
Cab Recirculating Air Filter FYA00011003 N/AN/AN/AN/A

Remove the Cutting Edge

A heavy-duty mechanic is beside an excavator bucket with a detached cutting edge.

Place the bucket on top of 2 or 3 wooden blocks to leave the cutting edge lifted.

Using an impact wrench, undo all the nuts holding the cutting edge bolts.

If you need to hold the bolts from spinning while taking out the nuts, DON’T use your hand since the bolts’ head gets razor-sharp when worn out. Instead, use a hammer or a piece of wood to keep them in place.

Heavy-duty mechanic shows how to use a hammer to hold the head of a worn bolt to remove the nut.

If you can’t take the nuts out with an impact gun, you can either torch them off or use a 20-pound sledgehammer to pop the bolts off.

Lift the bucket to separate it from the cutting edge.

With a wire wheel, clean up both faces. Make sure to wear a mask or respirator.

Reinstall the Cutting Edge

To the left side is a cutting edge with worn-out bolts and nuts, and to the right side, the same cutting edge with new bolts and nuts.

Rotate the cutting edge and place it on top of the wooden blocks.

Put the bucket down against the cutting edge, and align their holes with a crowbar/pry bar pointy end.

Screw the new nuts and bolts by hand, then tighten them with the impact gun.

Lift the bucket and run the nuts back over with the impact gun.

Smack the bucket a few times against the ground to help set the blade into its final position, and tighten the nuts one last time.

Wrapping Up

As you can see, servicing your John Deere 85G Excavator is not rocket science. However, if you don’t have the time or equipment, hire a service mechanic at Tekamo HD.

Be sure to check out the other posts we have in this series:

  1. Replace the Hydraulic Return Filter and the Oil Tank Breather filter.
  2. Change the Engine Oil and Filter.
  3. Replace the Engine’s Inner and Outer Air Filters.
  4. Replace the Fuel and Water Separator Filters.
  5. Change the cabin air filter.
  6. Change the Final Drive Oil.

Visit the FortisHD blog for more tips, tutorials, and guides about heavy equipment.

If you’re doing this service yourself, visit FortisHD to purchase a service kit with every filter you need, or visit Tekamo HD to hire an expert service technician.