Smithco Spray Star 3180 (sn 300G159 – 300G168) Parts & Service Manual - Manual (Page 7)

5
Service
MAINTENANCE
ENGINE OIL
With strict emission control regulations now in effect, the CF-4 and CG-4 engine oils have been developed for
use with low sulfur fuels, for On-Highway vehicle engines. When Non-Road engines run on high sulfur fuel, it is
advisable to use a "CF or better" classification engine oil with Total Base Number (a minimum TBN of 10 is
recommended).
Check the engine oil before starting or more than 5 minutes after stopping the engine. If oil level is low, remove
oil filler plug and add new oil to the prescribed level. Do not overfill. Engine oil should be MIL-L2104C or have
properties of API Classifications CD grades or higher. Change the type of Engine oil according to the ambient
temperature.
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.
TIRE PRESSURE
Caution must be used when inflating a low tire to recommended pressure. Over inflating can cause tires to ex-
plode. Front tires should be 20 psi (1.4bar) and rear tires should be 30 psi (2.0bar). Improper inflation will reduce
tire life considerably.