Hayter Mowers RZT420H manual Cutter Deck Maintenance, Servicing the Cutting Blades

Cutter Deck Maintenance

Servicing the Cutting Blades

Maintain sharp blades throughout the cutting season because sharp blades cut cleanly without tearing or shredding the grass blades. Tearing and shredding turns grass brown at the edges, which slows growth and increases the chance of disease.

Check the cutter blades daily for sharpness, and for any wear or damage. File down any nicks and sharpen the blades as necessary. If a blade is damaged or worn, replace it immediately with a genuine Hayter replacement blade. For convenient sharpening and replacement, you may want to keep extra blades on hand.

A worn or damaged blade can break, and a piece of the blade could be thrown into the operator’s or bystander’s area, resulting in serious personal injury or death.

•Inspect the blade periodically for wear or damage.

•Replace a worn or damaged blade.

Before Inspecting or Servicing the Blades

Park the machine on a level surface, disengage the blade control switch, and move the motion control levers outward to the park position. Stop the engine and remove the key.

Inspecting the Blades

Service Interval: Before each use or daily—Check the cutting blades.

1.Inspect the cutting edges (Figure 45). If the edges are not sharp or have nicks, remove and sharpen the blades; refer to Sharpening the Blades.

2.Inspect the blades, especially the curved area (Figure 45). If you notice any damage, wear, or a slot forming in this area (item 3 in Figure 45), immediately install a new blade.

		Figure 45
1.	Cutting edge	3. Wear/slot forming
2.	Curved area

Checking for Bent Blades

1.Raise the height-of-cut lever to the transport position, cutting height position G (also the 4-1/2 inch [115 mm]).

2.Rotate the blades until the ends face forward and backward (Figure 46). Measure from a level surface to the cutting edge, position A, of the blades (Figure 46). Note this dimension.

Figure 46

3.Rotate the opposite ends of the blades forward.

4.Measure from a level surface to the cutting edge of the blades at the same position as in step 2. The difference between the dimensions obtained in steps 2 and 3 must not exceed 1/8 inch (3 mm). If this dimension exceeds 1/8 inch (3 mm), the blade is bent and must be replaced. Refer to Removing the Blades and Installing the Blades.

Note: If a bent blade is replaced with a new one and the dimension obtained continue to exceed 1/8 inch (3mm), the blade spindle could be bent. Contact an Authorized Hayter Dealer for service.

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