Exmark Lazer HP - Manual (Page 49)

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5.2.5 Deck Belt Tension.
a) The deck belt is tensioned by a self-tensioning idler, no adjustment is
necessary.
5.2.6 Alternator belt tension. (Kawasaki Liquid-cooled units only)
a) Stop engine and remove key.
b) To tighten alternator belt, loosen both upper and lower alternator mounting
bolts. Rotate alternator out, away from engine and re-tighten hardware to
secure in place.
c) When properly tensioned, the alternator belt will deflect 1/8” while applying
5-7 pounds of force to the belt midway between the sheaves.
5.2.7 Adjust Seat Switch (All units except Kohler 26 HP EFI)
a) If necessary, adjust the seat actuator rod length to where the machine will
shut off when the operator raises off the seat (with brake disengaged or
blade switch engaged) but will continue to run with operator in seat (a
slight shift in weight should not shut machine off). Normal adjustment is
when length of spring is 2.09” (with seat up).
NOTE: To prevent rough ground cut-outs the unit is equipped with a time
delayed seat switch. When the operator raises off the seat with either the
brake disengaged or the cutting blades engaged, the engine should stop
after 1/2 second has elapsed.
b) To adjust seat switch, loosen locknut on bottom of the actuator rod (5/16 x 7”
bolt) and adjust the nuts to move the actuator plate up or down on the rod.
5.2.8 Belt Guide Adjustment.
a) Stop engine and remove key.
b) Remove the belt shield on the right side of mower deck.
c) For 52” & 62” units only - note belt guide bolted to deck near the shield
support stud and right-hand pulley. Guide should be 1/8” away from the
belt, with bolt-end of guide at end of slot (See Fig 13).
d) If adjustment is necessary, loosen the bolt securing the belt guide and
make proper adjustment. Tighten hardware.
FIG. 13
BELT GUIDE POSITIONING
e) There is a stationary belt guide at the rear center of the deck. Adjust to
where shank of bolt is 1/4” away from the edge of the sheave. Note: Bolt
head is above belt.
5.2.9 Brake Link Adjustment.
Check to make sure brake is adjusted properly.
a) Disengage brake lever (lever down).
b) Measure the length of the spring. Measurement should be 2.75” between
washers (see Fig 14).