Cub Cadet G 1236 service manual Sharpening a Blade, Changing the Transmission Drive

above and below the spindle.

1/4” Spacer

1/4” Spacers

Figure 17

5.Remove the long (9-1/2”) blade bolt, the flat washer, the blade and the blade spacers.

6.To replace the blade, reverse the above procedure. Be careful to replace the blade spacers correctly above and below the spindle. This is not a timed blade system and since blade overlap is provided, orientation is not important.

Figure 18

SHARPENING A BLADE

1.To sharpen a blade, clamp the blade in a vise and, using a flat mill file, carefully file the cutting surface on each end of the blade to a sharp edge.

2.Blades with severe nicks or dents that cannot be removed by filing should be replaced.

3.It is important that each cutting blade edge be ground equally to maintain proper blade balance. A poorly balanced blade will cause excessive vibration and may cause damage to the mower and result in personal injury. The blade can be tested by balancing it on a round shaft screwdriver. Grind metal from the heavy side until it balances evenly.

CHANGING THE BLADE DRIVE BELTS

(See Figure 19)

1. Make sure the blade clutch is disengaged.

2.Remove the deck cover. (This requires a 9/16” wrench)

3.Remove the cap screw which serves as a belt guide and is mounted in the idler pulley arm. (Item J, Figure 19.)

4.Slip the long blade drive belt off of the pulleys.

5.Place a new long blade drive belt through the belt guide and loop it around the engine pulley and then around the two deck pulleys. The belt’s back side should ride on the idler pulley.

6.Replace the cap screw, lock washer and nut in the idler pulley arm.

7.The idler pulleys should be adjusted so that when the blade clutch is engaged, a ten-pound pull between two pulleys deflects either belt about 1/ 2" (See Figure 18.) Do not overtighten these belts. The blade clutch should engage with only moderate force.

8.Replace the deck cover, and secure with 9/16” nut.

J

1/2” deflection

Figure 19

CHANGING THE TRANSMISSION DRIVE

BELT: (See Figure 20)

1.Make sure the blade clutch is disengaged.

2.Working under the engine deck, take the long blade drive belt off of the engine pulley.

3.Loosen the locknut (item I, Figure 20) holding the transmission drive belt idler pulley in place and slide the pulley away from the transmission drive belt.

4.Remove the old belt and mount a new belt onto the pulleys.

5.Slide the idler pulley back onto the belt and tighten the locknut holding it in place. The idler pulley should be adjusted so that a five-pound pull on the belt between the engine pulley and the transmission pulley deflects the belt about 3/16".

19