In order for the mower to work properly, and to always obtain a precision cut with lower HP requirements thus keeping cost down, proper blade maintenance is important. Blades must be kept sharp, at their original length and corner maintained. A blade must be replaced if, due to wear or damage, its original shape has been distorted.

Removing or installing blades.
If the mower blades need to be removed, do the following:
1. the blade turns in a counter clockwise (CCW) direction when viewed from the bottom of the deck. The cutting edge must be towards the direction of rotation. The lift wing of the blades is closest to the deck and the cutting edge away from it.
2. Install the cup washer over the blade bolt and secure the blade in place as described above.
3. With a wrench, block the spindle and tighten the bolt to 140 N.m., 103 lb.ft. (see figure below).
4. To remove the blades reverse the procedure.

Sharpening Blades
Blade sharpening is extremely important in order to get the best cutting results. Sharp blades permit a high quality cut and also reduces HP thus lowering cost. To sharpen blades, first remove them following the above instructions. Place the blade in a vise and sharpen them by using a hand file or grinder. Do not sharpen the blades to a sharp cutting edge. The cutting edge should be between 1/64" to 1/32" to prevent excessive pitting and dulling of the blades. Sharpen both ends of the blade equally for balance and always maintain corners. Always keep all three blades sharpened equally in order to maintain balance.