Exmark FMD 524, FMD 604 manual i Insert the second bearing and new seal into the wheel

h)If the axle assembly has had both spacer nuts removed (or broken loose), apply a thread locking adhesive to (1) spacer nut and thread onto the axle with the wrench flats facing outward. Do not thread spacer nut all of the way onto the end of the axle. Leave approximately 1/8” (3 mm) from the outer surface of the spacer nut to the end of the axle inside the nut.

i)Insert the assembled nut and axle into the wheel on the side of the wheel with the new seal and bearing.

h)With the open end of the wheel facing up, fill the area inside the wheel around the axle full of NGLI grade #1 multi-purpose grease.

i)Insert the second bearing and new seal into the wheel.

j)Apply a thread locking adhesive to the 2nd spacer nut and thread onto the axle with the wrench flats facing outward.

k)Torque the nut to 75-80 in-lbs. (8-9 N-m), loosen, then re-torque to 20-25 in-lbs. (2-3 N-m). Make sure axle does not extend beyond either nut.

l)Re-install the seal guards over the wheel hub and insert wheel into caster fork. Re-install caster bolt and tighten nut fully.

IMPORTANT: To prevent seal and bearing damage, check the bearing adjustment often. Spin the caster tire. The tire should not spin freely (more than 1 or 2 revolutions) or have any side play. If the wheel spins freely, adjust torque on spacer nut until there is a slight amount of drag. Re-apply threadlocking adhesive.

6.1.15Remove engine shrouds and clean cooling fins:

Service Interval: See Engine Owner's Manual

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

b)Remove cooling shroud cleanout covers from engine and clean cooling fins. Also clean dust, dirt, and oil from external surfaces of engine, which can cause improper cooling.

c)Make sure cooling shroud cleanout covers are properly reinstalled. Operating the engine without cooling shroud cleanout covers will cause engine damage due to overheating.

6.1.16Change fuel filter:

Service Interval: As Required

a)A fuel filter is installed in the fuel line between the fuel tank and the engine. Replace with Kohler P/N 2405002 when necessary.

6.1.17Lubrication of steering yoke pivot:

Service Interval: Monthly

a)The steering yoke pivot is permanently sealed and should require no additional lubrication. If there is evidence of seal leakage, replace the seals or bearings and fill with NGLI grade #2 multi-purpose grease or wheel bearing grease.

6.1.18Check spark plugs.

Service Interval: 160 hrs.

a)Remove spark plugs, check condition and adjust plug gap, or replace with new plugs. See Engine Owners Manual.

6.1.19Change hydraulic system oil or filter: 6.1.19.1 Change hydraulic filter:

Service Interval: After first 250 hrs, then yearly thereafter.

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

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