Simplicity 654, 653 manual Variable Safety Interlock

starter will actuate. If difficulty is experienced in moving the shift lever through the neutral position, raise the switch until the shift lever moves easily. Place a film of grease on the end of the safety interlock to reduce friction and wear.

VARIABLE SAFETY INTERLOCK

FIGURE 21

Power Take-Off Clutch and Belt Stops: The power take-off clutch can be correctly adjusted only when the attachment such as a mower or sickle bar is mounted and the drive belt connected. The clutch adjustment is made by moving the set collar located behind the left footr&. Loosen the set- screw on the collar and adjust it so there is about l/4” clearance between the colla and the end of the rod guide when the clutch is engaged. BE SURE, THE SPRING TEN- SION LEVER AT’TtiE LEFT REAR OF THE TRACTOR IS PULLED BACK IN THE TIGHTENED POSITION. Set the clutch only tight enough to drive the attachment with- out belt slippage. Unnecessary belt tension will cause rapid wear of the belt and pulleys. See figure 22.

The power take-off belt stop should be adjusted after the clutch has been adjusted and with the attachment. Loosen the mounting bolt and adjust the belt stop so it is l/8” from the belt when the clutch is engaged. See figure 22. Tighten the mounting bolt securely and check the l/8” di- mension again.

The belt guard located at the top of the power take-off un- it should be adjusted so there is l/8” clearance between the guard and the belt when the power take-off clutch is engaged. Loosen the mounting bolt and move the belt guard as required. See figure 22. Tighten the mounting bolt securely.

,FIGURE 22

Variable Speed D&e: ALWAYS HAVE’THE ENGI:&E

RUNNING A N D T H E C L U T C H ENGAGED.‘(RE- LEASED) WHEN ATTEMPTING TO MOVE THE,VARI- ABLE SPEED CONTROL LEVER. Adjust the variable speed drive as follows. The reference numbers correspond to the numbers on figure 23;

1.With the engine running and the transmi&ion in neutral place the variable control in the fast (7) position.

2.Remove the spark plug wire and place it at least .1/Z inch away from the spark plug.

3.Loosen slightly, the bolt which holds the control arm to the variable lever.

4.Rotate the engine with the starter and move the vari- able arm until the belt runs flush with tlie top of the small pulleys. This may be most easily done by using a bar about

2to 3 feet long and about 314 inch in diameter to move the flat variable arm. See figure 23.

5. Tighten the bolt loosened in step 3, being careful not to

move either the control lever or the variable arm. ”

6.While rotating the engine with the Starter, move the control lever to the slow (1) position. Loosen the lock nut at the tumbuckle and alternately adjust the turnbuckle and rotate the engine. Adjust the turnbuckle so the belt will ride l/8” below the top of the large pulley when the engine is rotated.

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