Exmark FMD524 manual ANTI-SCALP Roller Installation Cutting Height Adjustment

c)Adjust anti-scalp rollers for Normal Operating Conditions. Place rollers in one of the positions shown in Figure 10. Rollers will maintain 3/4 in. (19 mm) clearance to the ground to minimize gouging and roller wear or damage.

For Maximum Deck Flotation, place rollers one hole position lower. Rollers should maintain 1/4 in. (6.4 mm) clearance to ground. Do Not adjust rollers to support the deck. Be sure roller bolts and nuts are installed with the spring disc washer between head of the bolt and mounting bracket.

Two types of anti-scalp roller assemblies are available. See Figure 10 to determine which assembly has been installed on the unit. Torque hardware as specified, or loss of roller may result.

Type A – Torque the 3/8 whizlock nut to 40-45 ft-lbs. (54-61 N-m) Type B – Torque the 3/8 nyloc nut to 30-35 ft-lbs. (41-47 N-m)

Torque the 3/8-24x2 Gr 8 hex capscrew to 50-55 ft-lbs (68-75 N-m)

FIGURE 10

ANTI-SCALP ROLLER INSTALLATION

AND CUTTING HEIGHT ADJUSTMENT

d)When operating in extremely rough conditions it may be necessary to position the anti-scalp rollers one or two holes higher than described in "c" to prevent damage to the rollers and/or bolt failure. See Figure 10.

NOTE: When anti-scalp rollers are placed in these positions, reduced deck flotation will result.

5.2.2Pump drive belt tension adjustment: No adjustment necessary.

5.2.3Mower deck drive belt: No adjustment necessary.

5.2.4Blade drive belt tension: No adjustment necessary.

5.2.5Hydro Drive Linkage Adjustment:

a)Adjust Speed Control Linkage and Neutral Safety Switch

1.Stop engine and wait for all moving parts to stop.

2.Move speed control lever (located on console) to the full forward position and check orientation of tabs on the ends of the speed control crank. See Figure 11. These tabs should be pointing straight down at the 6 o’clock position or slightly forward. Adjust threaded yoke at the bottom of speed control linkage until tabs are positioned correctly. See Figure 11.

3.Pull speed control lever back to neutral. Check that the neutral safety switch actuating tab has depressed the plunger of the switch so that there is about 5/16” between the tab and the switch. See Figure 11. If necessary, move the switch fore and aft.

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