Dixon ZTR 5020 Operator's Manual page 41

CARE AND MAINTENANCE
HYDROSTATIC TRANSMISSION OIL & FILTER SERVICE
(continued):
5.
6.
7.
8.
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11.
Depress by-pass valve on both hydros.
Start engine and move throttle to
mid-range setting.
Release parking brake.
Dirty oil, filled with air bubbles, will
start to drain from oil return hoses
into container. When oil flowing from
hoses is clear and contains no
bubbles, stop the engine.
Re-attach oil return hoses to top of
reservoir.
Release by-pass valve on both hydros.
Add sufficient oil to reservoir to
return oil level to full mark.
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