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Standard Blade Assembly
Drop Blade Maintenance - 3 blades
1. Perform maintenance on level surface with the 72 M-AX blocked off the ground. Shut off the hy-
draulic power supply and disconnect hydraulic couplers.
2. Tighten bolts of blades every use or every eight hours. Inspect blades.
3. Damaged, bent or dull blades should be replaced immediately. Replace all three blades, and
hardware at the same time. Follow the instructions below.
To Replace Blades:
1. Remove Nylock nuts and washers from plate on the cutter deck to expose access hole. Reference
item #2 on the Parts drawing of 72 M-AX on page 12.
2. Through the exposed access hole rotate the blade carrier to line up the nut of the blade for ac-
cess.
3. Insert a 1-11/16”socket through the access hole and remove the nut for each blade.
4. Remove blades from brush cutter.
5. Clean new bolts, lock-nuts and washer with cleaner/degreaser. Prior to assembly, ensure all
hardware is dry and free of any contaminents including the carrier assembly.
6. Use Primer Loctite on the bolts and nuts according to directions on the label.
7. Apply Loctite #243 to the first 10 bolt threads to ensure coverage.
8. Assemble the new blade, the bolt, washers, and the nut to the carrier. The blade carrier cuts in
one direction - counter clockwise.
9. Torque the blade bolts to 540 ft/lbs using a 1-11/16” socket.
10. Confirm the blade carrier rotates freely and is clear of any obstructions.
11. Install the plate to the access hole on the top of the 72 M-AX.
