Smithco Spray Star 1750D (sn 175D180 – Current) Parts & Service Manual - Manual (Page 7)

5
Service
MAINTENANCE
ENGINE OIL
Change and add oil according to chart below based on air temperature at the time of operation. Do not overfill.
Use a high quality detergent oil classified "For Service SJ or higher" oil. Use no special additives with recom-
mended oils. Do not mix oil with gasoline.
SAE Viscosity Grades
Starting Temperature Range Anticipated Before Next Oil Change
HYDRAULIC OIL
1. Use SAE 10W-40 API Service SJ or higher motor oil.
2. For proper warranty, change oil every 500 hours or annually, which ever is first.
3. Oil level should be 2-2½" (5-6.4cm) from top of the tank when fluid is cold. Do not overfill.
4. After changing oil, run the machine for a few minutes. Check oil level and for leaks.
5. Always use extreme caution when filling hydraulic oil tank or checking level to keep system free of
contaminants. Check and service more frequently when operating in extremely cold, hot or dusty condi-
tions.
6. If the natural color of the fluid has become black or smells burnt, it is possible that an overheating problem
exists.
7. If fluid becomes milky, water contamination may be a problem.
8. If either of the above conditions happen, change oil immediately after fluid is cool and find the cause. Take
fluid level readings when the system is cold.
9. In extreme temperatures you can use straight weight oil. We recommend SAE 30W API Service SG when
hot (above 90°F (33°C)) and SAE 10W API Service SJ or higher when cold (below 32°F (0°C) ambient
temperature. Use either motor oil or hydraulic oil, but do not mix.
10. Oil being added to the system must be the same as what is already in the tank. Mark the tank fill area as
to which type you put in.