Scag Power Equipment SFZ Operator's Manual page 33

Section 7
5. Once the hydraulic system has drained, install new
hydraulic oil filters to both axles by hand, turn 3/4 to
one complete turn after the filter gasket contacts the
filter base.
6. Reinstall the filter guards and torque the screws to 65
in/lbs.
7. Remove the top port plug from both axles before filling
with oil. (See Figure 7-4).
REMOVE TOP
PORT PLUG
Figure 7-4 Top Port Plug Location
8. Fill the hydraulic system oil reservoir with 20w50
motor oil until oil just appears at the bottom of each
axles top port. Approximately 5 quart capacity.
Reinstall the top port plugs and torque to 180 in/lbs.
-NOTE-
The left side axle will fill with oil first using
approximately 4 Quarts of oil. Reinstall the top port
plug in the left axle and continue filling the
hydraulic system through the reservoir. The right
side axle should fill up to the bottom on the top port
plug after adding an additional one quart of oil.
Reinstall the top port plug on the right axle and fill
the hydraulic oil reservoir to the proper level as
explained in section 7.2.
9. Reinstall the hydraulic oil reservoir cap.
10. The hydraulic system will need to be purged. Raise the
rear of the machine so the drive wheels are off the
ground. Use jackstands and block the wheels to prevent
the machine from moving.
11. Move the dump valve control levers to the "freewheel"
position. (See Figure 7-5).
DUMP VALVE
CONTROL LEVER
"DRIVE" POSITION
"FREEWHEEL" POSITION
Figure 7-5 Dump Valve Control Lever
12. While in the operators position, start the engine and
disengage the parking brake.
13. Run the engine at 1/2 throttle and move the steering
control levers forward and backward 5 to 6 times.
14. Engage the parking brake. Move the dump valve control
levers to the drive position. (See Figure 7-5).
15. While in the operators position,, run the engine at 1/2
throttle. Release the parking brake, move the steering
control levers forward and backward 5 to 6 times. It
may be necessary to repeat steps 12 to 15 until the air
is completely purged from the system.
16. Check the hydraulic system oil level as explained in
section 7.2.
29
2007 SFZ DVL