Exmark Quest 4500-450 - Manual (Page 33)

Maintenance
Change the Hydraulic
System Filter
Service Interval: After the first 250 hours
Every 500 hours thereafter
(Every 250 hours if using
Mobil 1 15W50)
1. Stop engine, wait for all moving parts to stop, and
allow engine to cool. Remove key and engage
parking brake.
2. Locate the two filters under the transmissions.
Remove filter guards.
3. Carefully clean area around filters. It is important
that no dirt or contamination enter hydraulic
system.
4. Unscrew filters to remove and allow oil to drain
from drive system.
Important: Before reinstalling new filters,
apply a thin coat of Exmark Premium Hydro
oil on the surface of the filters rubber seal.
Turn the filters clockwise until rubber seal
contacts the filter adapter then tighten the filter
an additional 3/4 to 1 full turn.
5. Remove the vent plug on each transmission and
fill through expansion reservoir, when oil comes
out of vent reinstall plug.
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
Torque plugs to 180 in-lb (244 N-m). Continue to
add oil until it reaches the FULL COLD line on
the expansion reservoir.
Figure 24
1. Oil filter 3. Left rear tire
2. Vent plug
6. Raise the rear of machine up and support with
jack stands (or equivalent support) just high
enough to allow drive wheels to turn freely.
7. Start engine and move throttle control ahead to
1/2 throttle position. Disengage parking brake.
A. With the bypass valve open and the engine
running, slowly move the directional control
in both forward and reverse (5 or 6 times).
B. With the bypass valve closed and the engine
running, slowly move the directional control
in both forward and reverse directions (5 to
6 times). Check the oil level, and add oil as
required after stopping the engine.
C. It may be necessary to repeat steps A and
B until all the air is completely purged from
the system. When the transaxle operates at
normal noise levels and moves smoothly
forward and reverse at normal speeds, then
the transaxle is considered purged.
Do Not change hydraulic system oil (except for what
can be drained when changing filter), unless it is felt
the oil has been contaminated or been extremely hot.
Changing oil unnecessarily could damage hydraulic
system by introducing contaminates into the system.
Servicing the Spark Plug
Service Interval: Every 200 hours/Every 2
years (whichever comes
first)
Every 500 hours—Replace
the spark plug.
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