Exmark 4500-528 Check Safety Interlock System, disengaged-starter must not crank, Maintenance

Maintenance

Figure 11

1.Install bushing in blade prior to installing bushing in spindle.

B.Install bushing/blade combo into spindle.

Figure 12

WARNING

Incorrect installation of the blade or components used to retain the blade can be dangerous. Failure to use all original components and assembled as shown could allow a blade or blade component to be thrown out from under the deck resulting in serious personal injury or death.

Always install the original Exmark blades, blade bushings, and blade bolts as shown.

Check Safety Interlock System

Service Interval: Before each use or daily

1. Check starting circuit. Starter should crank with:

Operator Presence Control levers depressed,

speed control lever in neutral, and PTO

disengaged.

Try to start the engine with OPC levers

disengaged, speed control lever in neutral and

PTO disengaged-starter must not crank.

Try to start with, OPC levers depressed, speed

control lever in any speed but neutral and PTO

disengaged-starter must not crank.

1.Use wrench here for blade installation. This nut has been torqued to 90–110 ft-lb (122–149 N-m)

2.Torque to 55-60 ft-lb (75-81 N-m) Apply lubricant to threads as needed to prevent seizing. Copper-based anti-seize preferable. Grease acceptable substitute.

Try to start with OPC levers depressed,

speed control lever in neutral and PTO

engaged-starter must not crank. .

2. Check OPC circuits. Clear the area. Run engine

at one-third throttle, then, with drive levers and

neutral lock latches in neutral lock position,

C.Apply lubricant to threads of blade bolt as needed to prevent seizing. Copper-based anti-seize preferable. Grease acceptable substitute. Install blade bolt finger tight. Place wrench on the top spindle nut then torque the blade bolts to 55-60 ft-lb (75-81 N-m).

move the speed control lever out of neutral and

release OPC levers engine must stop. Again,

run engine at one-third throttle, move the speed

control lever to neutral, engage PTO and release

OPC levers-engine must stop.

Note: Park brake must be disengaged before the speed control lever is moved out of neutral or engine will kill.

Note: If machine does not pass any of these tests, do not operate. Contact your authorized EXMARK

SERVICE DEALER.

Important: It is essential that operator safety mechanisms be connected and in proper operating condition prior to use for mowing.

25