Engine Belt Pulley, Mower blade removal

Engine

Belt

pulley

Figure 9-19

4.Remove the deck drive belt from the electric clutch pulley. This belt does not need to be removed from any of the other pulleys.

5.Release the tension from the integrated pump/motor belt by pulling on the idler pulley (extending spring carefully) and sliding the belt over it. Use caution when releasing the idler pulley as there is still tension on it and it will snap back into position. Fig. 9-18

6.Slide the belt off the engine pulley. The belt will have to be slid above the engine pulley to allow the belt to be removed from the other pulleys. Fig. 9-19

7.Slide the belt over the integrated pump/motor pulleys.

8.Slide the belt off of the fixed idler pulley.

9.The belt can now be removed from above the engine pulley.

10.Install new belt by sliding it up and over the engine pulley. Make certain it is not in the pulley groove at this time but is above the pulley.

11.Slide the belt over the fixed idler pulley and then over the integrated pump/motor pulleys.

12.Slide the belt onto the engine pulley.

13.Pull the idler pulley over and slide the belt onto it. Make certain to keep fingers from getting between the belt and the pulley when the pulley is released and tension is re-established.

14.Re-install the deck drive belt on the electric clutch pulley and make sure it is routed properly on all of the deck pulleys.

15.Re-tension the deck belt idler per the Deck drive belt adjustment section located elsewhere in this manual.

16.Re-attach the negative battery cable.

Mower blade maintenance

Check the mower blades daily, they are the key to power efficiency and well groomed turf. Keep them sharp, a dull blade will tear rather than cut the grass, leaving a brown ragged top on the grass within a few hours. A dull blade also requires more power from the engine.

Replace any blade which is bent, cracked or broken.

WARNING: Never attempt to straighten a bent blade by heating, or weld a cracked or broken blade as the blade may break and cause serious injury. Replace worn or damaged blades.

DANGER: Never work with blades while engine is running or deck clutch switch is engaged (on). Always place deck clutch switch in the disengaged position, place control levers in the park brake position and turn engine off and disconnect negative battery cable. Block up mower when you must work under it. Wear gloves when handling blades. Always check for blade damage if mower strikes rock, branch or other foreign object during mowing!

WARNING: Always wear adequate eye protection when grinding mower blades.

Always place deck clutch switch in the disengaged position, place control levers in the park brake position and turn engine off and disconnect negative battery cable. Block up mower when you must work under it. Wear gloves when handling blades. Always check for blade damage if mower strikes rock, branch or other foreign object during mowing!

Resharpening Pattern

Do not sharpen to original pattern (below).

It is easier to get a straight cutting edge following the resharpening pattern shown above.

Original Edge

Figure 9-20

Warped Blade (Replace)

Cutting

Plane

Straight Blade

Comparison of Warped and Straight Blades

Figure 9-21

Mower blade removal

Use a 15/16" wrench to remove the 5/8" cap screw holding the blade to the spindle shaft from underneath.

Sharpen the blades on a grinder following pattern as shown (Fig. 9-20). Touch-up sharpening can be done with a file.

Check the blades for balance following grinding. A commercial balancing tool is available through most hardware supply stores, or balancing can be done by placing the blade on an inverted line punch or 5/8" bolt. Blade should not lean or tilt. Spin the blade slowly, blade should not wobble. If blade is out of balance, true it up before reinstalling.

Lay the blade on a flat surface and check for distortion (Fig. 9-21 and 9-

22). Replace any distorted blade.

Do not re-use spindle bolts which have stripped, worn or undercut threads. Torque bolts on spindles to 118 foot-pounds when reinstalling blades.

IMPORTANT: The blade sail (curved part) must be pointing upward toward the inside of the deck to ensure proper cutting.

WARNING: When mounting blades, rotate them after installation to ensure blade tips do not touch each other or sides of the mower.

WARNING: Failure to correctly torque the bolt may result in the loss of the blade which can cause serious injury.

WARNING: Mower blades are sharp and can cut. Wrap the blade(s) or wear gloves and use extra caution when servicing them.

9-12	365262 4/07

Lawn Mower specifications

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