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Maintenance
CAUTION
Raising the mower deck for service or
maintenance relying solely on mechanical
or hydraulic jacks could be dangerous. The
mechanical or hydraulic jacks may not be
enough support or may malfunction allowing
the unit to fall, which could cause injury.
Do Not rely solely on mechanical or hydraulic
jacks for support. Use adequate jack stands
or equivalent support.
3. Remove the pump drive belt.
4. Place a catch pan under the hydro.
5. Carefully clean area around the lters. It is
important that no dirt or contamination enter the
hydraulic system.
6. Using a socket, unscrew lters to remove and
allow oil to drain.
7. Before installing the new lters, apply a thin coat
of Exmark Premium Hydro oil on the surface of
the two rubber seals.
8. Install the new lters and torque to 14 ft-lb (19
N-m).
9. Fill the hydraulic system as stated in Check
Hydraulic Oil Level section.
Exmark Premium Hydro Oil is recommended.
Refer to the chart for an acceptable alternative:
Hydro Oil
Change Interval
Exmark Premium Hydro
Oil (Preferred)
500 Hours
Mobil 1 15W50
250 Hours
10. Remove the catch pan and properly dispose of
hydro oil and lter according to local codes.
11. Re-install the pump drive belt.
12. Start engine and move throttle control ahead to
full throttle position. Move the speed control
levers to the full speed and run for one minute.
Shut down the machine, allow the hydros to cool
and recheck oil level.
13. Remove the jack stands.
Note: Do Not change the hydraulic system oil
(except for what can be drained when changing lter),
unless it is felt the oil has been contaminated or been
extremely hot.
Changing oil unnecessarily could damage hydraulic
system by introducing contaminants into the system.
Wheel Hub - Slotted Nut
Torque Specication
Service Interval: After the rst 100 hours
Every 500 hours thereafter
When tightening the slotted nut on the wheel motor
tapered shaft:
1. Remove and discard the cotter pin.
2. Torque the slotted nut to 200 ft-lb (271 N-m).
3. Check distance from bottom of slot in nut to
inside edge of hole. Two threads (0.1 inch) or less
should be showing.
Figure 25
1. 0.1 inch max 2. No more than two
threads (0.1 inch max)
should be showing here.
4. If more than two threads (0.1 inch) are showing
remove nut and install washer (P/N 1-523157)
between hub and nut.
5. Torque the slotted nut to 200 ft-lb (271 N-m).
6. Then tighten nut until the next set of slots line up
with the cross hole in shaft. Do Not loosen nut
to align the slot. If required, tighten to the next
set of slots.
7. Install new cotter pin (P/N 1-806800).
Note: Do Not use anti-seize on wheel hub.
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