Ch 5 page 23 HYDRAULIC SYSTEM Startup test procedure Check oil level in hydraulic tank. Refill if necessary. (For fluid type and specifications, refer to the Hyundai Operating & Maintenance Manual Chapter 6) NOTE Check level glass on the hydraulic tank. Hydraulic fluid is preferred, but ATF oil or engine oil can be used. (Ref. Operators Manual, Chapter 6 - Lubricants, and Chapter 7 - Maintenance) Start engine, and let it run until hydraulic fluid temperature exceeds 40 o C. Oil temperature increases faster by tilting dumper body several times, and/or frequently moving steering wheel from lock to lock. During warm-up check for any leaks in the hydraulic system.
Any leaks must be repaired before proceeding the warm-up. After warm-up, re-check hydraulic fluid level, and perform an operational check of all functions as follows: Check 1 Steering function. Turn steering wheel from side to side, lock to lock, engine speed 720 rpm. (low idle). Count the number of turns. Approx. 5 turns is acceptable. Check 2 Steering pressure. Engine at 2000 rpm, hold steering wheel towards either end lock position. Hydraulic pressure: 207 - 217 (See pressure in display: P1M) Check 3 Tilting pressure, lowering. Engine at 720 rpm, lower dumper body. Lowering time should be approx. 18 sec. / 10 sec. at max rpm Hydraulic pressure: 100 bar ± 5. SHOP MANUAL