Poulan PP1644JA User Manual - Page 20

SERVICE AND ADJUSTMENTS TO REPLACE MOWER BLADE DRIVE BELT (See Fig. 26) Park the tractor on level surface. Engage parking brake. • Remove mower drive belt (See"TO REPLACE MOWER DRIVE BELT" in this section of this manual). Remove mower (See "TO REMOVE MOWER" in this section of this manual). • Remove four screws from R.H. mandrel cover and remove cover. Unhook spring from bolt on mower housing. • Carefully roll belt off R.H. mandrel pulley. • Remove belt from center mandrel pulley, idler pulley, and L.H. mandrel pulley. • Remove any dirt or grass which may have accumulated around mandrels and entire upper deck surface. • Check secondary idler arm and idler to see that they rotate freely. • Be sure spring is hooked in secondary idler arm and sway-bar bracket. • Install new belt in lower groove of L.H. mandrel pulley, idler pulley, and center mandrel pulley as shown. • Roll belt over R.H. mandrel pulley. Make sure belt is in all grooves properly. • Reconnect spring to bolt in mower housing and reinstall R.H. mandrel cover. • Reinstall mowerto tractor (See "TO INSTALL MOWER" in the Assembly section of this manual). • Reassemble mower drive belt (See `TO REPLACE MOWER DRIVE BELT' in this section of this manual). L.H. MANDREL MOWER BLADE DRIVE BELT CENTER MANDREL R.H. MANDREL COVER SCREW SECONDARY IDLER ARM SPRING SWAY-BAR IDLER BRACKET PULLEY FIG. 26 • Make sure attachment clutch and ignition switches are in "OFF" position. • Adjust the three nylon locknuts until space between clutch plate and rotor measures .012" at all three slot locations cut in the side of brake plate. NOTE: After installing a new electric clutch, run tractor at full throttle and engage and disengage electric clutch 10 cycles to wear in clutch plate. ROTOR CLUTCH PLATE .012" SLOT (3) NYLON LOCKNUT (3) FIG. 27 BRAKE PLATE TO ADJUST BRAKE (See Fig. 28) Your tractor is equipped with an adjustable brake system which is mounted on the right side of the transaxie. If tractor requires more than six (6) feet stopping distance at high speed in highest gear, then brake must be adjusted. • Depress clutch/brake pedal and engage parking brake. • Measure distance between brake operating arm and nut "A" on brake rod. • If distance is other than 1-1/2", loosen jam nut and turn nut "A" until distance becomes 1-1/2". Retighten jam nut against nut "A". • Road test tractorfor proper stopping distance as stated above. Readjust if necessary. If stopping distance is still greater than six (6) feet in highest gear, further maintenance is necessary. Contact your nearest authorized service center„ WITH PARKING BRAKE "ENGAGED" 1-1/2" NUT "A" JAM NUT TO ADJUST ATTACHMENT CLUTCH (See Fig. 27) The electric clutch should provide years of service. The clutch has a built-in brake that stops the pulley within 5 seconds. Eventually, the internal brake will wear which may cause the mower blades to not engage, or, to not stop as required. Adjustments should be made by an authorized service technician. 20 e FIG. 28 OPERATING ARM