Dixon Black Bear ZTR 34, ZTR 44, ZTR 34 Safety And Operating Manual page 40

CARE AND MAINTENANCE
HYDROSTATIC TRANSMISSION OIL
AND FILTER SERVICE
Dirt or water in oil can ruin the hydrostatic transmissions.
SERVICE INTERVALS
•
Initial filter service - 100 hours
•
Every 500 hours or once a year thereafter.
RECOMMENDED Oil
All temperatures -
15W-50 Synthetic Hydrostatic Oil
~or if not available~
Normal Operating Temperatures - 20W50 engine oil
Cold climate usage - 10W40 engine oil
Use engine oil with an API classification of SG/CD.
IMPORTANT -- OIL FILTER: P/N 539 121763 - The oil
filter is a special design for use on "vacuum or
suction" oil flow systems.
DO NOT USE AUTOMOTIVE ENGINE OIL FILTERS!
These filters require "pressure" to allow oil flow and usage
will result in an "air-lock" condition with possible damage.
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