Exmark 850 Rear Caster Pivot Bearings Pre-LoadAdjustment, Hopper Door Adjustment, Maintenance

Maintenance

Rear Caster Pivot Bearings

Pre-Load Adjustment

Remove dust cap from caster and tighten nyloc nut until washers are flat. Back off 1/4 of a turn to properly set the pre-load on the bearings. If disassembled, make sure the spring disc washers are reinstalled as shown in Figure 22.

	Figure 23
1. Loosen door hinge	2. Place a piece of 3/8 inch
nuts-three per side	(9.5 mm) rubber on this
	surface

Figure 22

1.Spring disc washers

Hopper Door Adjustment

Door Closing:

Loosen six door hinge nuts (see Figure 23).

Open door and place a 3/8 inch rubber strip or 3/8 inch diameter hose between the hopper and hopper door (see Figure 23).

Close door and push tight against hopper.

Tighten hinge hardware. Open hopper door and remove rubber strip.

PTO Brake Spring

Adjustment

PTO brake spring adjustment is only necessary if the blower has been removed or replaced or if the PTO drive idler arm has been disassembled.

1.Stop engine, wait for all moving parts to stop, and remove key. Engage parking brake.

2.Locate the brake spring and thread the two jam nuts out to the end of the brake spring rod (see Figure 24).

3.Tighten jam nuts together at end of brake spring rod.

Figure 24

1.Tighten jam nuts here

2.PTO Brake spring assembly

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