Exmark METRO 21 MPKA21 - Manual (Page 29)

Maintenance
Servicing the Wheels
Service Interval: Every 100 hours
Removing the Wheels
1. Stop engine, wait for all moving parts to stop.
2. Disconnect the wire from the spark plug.
3. Remove the bolt, the wheel spacer, and the
locknut mounting the wheel to the pivot arm
(Figure 26).
Figure 26
1. Plastic Cover 6. Bearing Spacer
2. Locknut 7. Bearing/Hub Assembly
3. Wheel half 8. Lug
4. Bolt 9. Wheel Spacer
5. Bearing
4. Separate the wheel halves from the tire by
removing four bolts and four locknuts.
Note: If you remove the bearings from the
bearing/hub assembly, remove them by pressing
on the bearing spacer.
Assembling the Wheels
1. Position the tire onto one wheel half, aligning the
lugs on each.
2. Place the bearing/hub assembly into the center
hole of the wheel half. Ensure that the legs of the
hub are positioned over the flange of the hole.
3. Place the other wheel half onto the bearing/hub
assembly, aligning the wheel and the tire lugs and
the mounting holes.
4. Using two fully threaded screws or bolts and
non-locking nuts, loosely secure the wheel halves
together. Mount the screws or bolts in the
opposing holes.
5. Check the alignment of all parts and tighten the
screws, alternating from side to side for a uniform
fit until the wheel halves are drawn together.
6. Install the two cap screws and two locknuts
previously removed in the remaining holes in the
wheel halves and tighten. Remove the two long
screws or bolts and replace them with two cap
screws and two locknuts.
7. Install the wheel to the pivot arm with the cap
screws, a spacer, and a locknut. Ensure that the
spacer is positioned between the wheel hub and
the pivot arm.
8. Connect the wire to the spark plug.
Check Condition Of Belt
(Self-Propelled Units Only)
Service Interval: Every 40 hours
1. Stop engine, wait for all moving parts to stop.
2. Remove the bolts that secure the belt cover to the
lawn mower housing.
3. Check the belt for cracks, frayed edges, burn
marks or any other damage.
4. Replace the damaged belt.
Lubricate the Pivot Arms
1. Move the rear wheel cutting height levers to the
center setting.
2. Wipe the grease fittings with a clean rag
(Figure 27).
Figure 27
1. Grease fitting
3. Install a grease gun onto the fitting and gently
apply 2 or 3 pumps of #2 multi-purpose lithium
base grease.
Note: Excessive grease pressure may damage the
seals.
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