Smithco AFC Sport Truck (sn AFT1032 – AFT1036) Operator Manual - Manual (Page 12)

10
Service
MAINTENANCE
TIRE PRESSURE
Caution must be used when inflating a low tire to recommended pressure. Over inflating can cause tires to ex-
plode. Tires should be front 5 psi (.35 bar) and rear 20 psi (1.36 bar) maximum. Improper inflation will reduce tire
life considerably.
ENGINE OIL
Change and add oil according to chart below. Do not overfill. Use a high quality detergent oil classified "For Ser-
vice SJ or higher" SAE 30 oil. Use no special additives with recommended oils. Do not mix oil with gasoline.
SAE Viscosity Grades
Starting Temperature Range Anticipated Before Next Oil Change
Air cooled engine run hotter than automotive engines. Use of multi-viscosity oils (10W-30, etc) above 40° F
(4° C) will result in high oil consumption and possible engine damage. Check oil level more frequently if using
these types of oils.
SAE 30 oil, if used below 40° F (4° C), will result in hard starting and possible engine bore damage due to inad-
equate lubrication.
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. The oil level should be 2" to 2 1 /
2
" from top of fill neck 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 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 conditions.
6. If natural color of fluid is now 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 and filter immediately after fluid is cool and find cause.
Take fluid level readings when system is cold.
9. In extreme temperatures you can use straight weight oil. We recommend SAE 30W API Service SJ or
higher 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 tank fill area as to
which type you put in.