Exmark LAZER Z HP manual Figure Swivel Adjustment, Spring Compression Adjustment

h)Loosen the two (2) top chain bolts in slots in the rear deck lift arms. Loosen jam nuts and back off the socket head adjusting screws on the bottom of the arms until the chains are just loose. Turn the socket head adjusting screws in until slack is taken out of each chain. Tighten the jam nuts. Tighten the chain bolts in the deck lift arms making sure they don’t move while tightening.

i)Loosen the four (4) nuts which secure the front swivels (two per side) until the front chains are loose and front of deck is supported by the 3/4” (19 mm) block. Do not loosen the front chain hardware.

j)On left side, adjust front swivel using the locking nut behind the swivel until the front chain is tight and all slack is removed from linkage. Do not lift front of deck off 3/4” (19 mm) block. Secure front swivel using locking nut in front of swivel. Repeat for right side.

k)Recheck that the 3/4” (19 mm) blocks fit just snugly under the brackets and that the tension on all the chains are approximately equal. Make sure all chain attachment bolts are tight. Reposition anti-scalp rollers and tighten securely.

11 1/8” (28.3 cm) For 52” Deck

10 1/2” (26.7 cm) For 60” Deck

11 1/2” (29.2 cm) For 72” Deck

Front of Unit

FIGURE 12

SWIVEL ADJUSTMENT

SPRING COMPRESSION ADJUSTMENT

l)Raise deck lift lever to the 5” (12.7 cm) cutting height position See Figure 10. Adjust spring compression until proper distance is obtained between the two large washers (See Figure 12). Adjustment is made by turning the nut at the front of each spring (clockwise will shorten the spring, counter-clockwise will lengthen the spring). Lock in position with jam nuts.

NOTE: When above adjustments have been made, the front of the deck will be slightly lower than the rear of the deck.

5.2.3Pump Drive Belt Tension.

Self-tensioning - No adjustment necessary.

5.2.4Mule Drive Belt Tension Adjustment. Self-tensioning idler, adjust as follows:

a)Stop engine, wait for all moving parts to stop, and remove key.

b)Check to make sure the center of the bolt head in the center of the spring loaded pulley, on left side engine deck support, is positioned between the centers of the two alignment holes in the left support plate (See Figure 13). It is necessary to adjust the belt tension when the center of the bolt head is at or below the center of the bottom alignment hole.

c)When adjustment is necessary, loosen the idler pulley on the right-hand side so it can move up and down in the slot.

Place a wrench on the 3/8” nut in the center of the spring loaded pulley and apply upward pressure to relieve tension on the spring (a 1/2” drive breaker bar and 9/16 socket works best).

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