3. HYDRAULIC SYSTEM 3. HYDRAULIC SYSTEM HYDRAULIC OIL IS CLOUDY HYDRAULIC OIL IS CLOUDY 1) 1) HYDRAULIC OIL TEMPERATURE HAS RISEN ABNORMALLY HYDRAULIC OIL TEMPERATURE HAS RISEN ABNORMALLY 2) 2) 5-7 YES Drop hydraulic oil sample on hot plate and check if foams come up. NO Cause Remedy Water is mixed. Air is intruded. Put hydraulic oil still, separate water and dispose it or replace hydraulic oil. Check suction line and return line and eliminate the air intruding source. NO Is hydraulic oil volume proper? YES Is not oil cooler clogged and is YES anything blocking YES air circulation? Is fan belt tension proper?
NO NO Is not the set YES pressure of main relief, relief and ⓐ travel relief valve Is main relief lower than the YES valve used very standard level? NO often? Cause Remedy ⓐ Replenish specified oil to the standard level. Clean oil cooler. Secure air circulation route. Adjust belt tension or replace belt. Readjust set pressure. Reduce load. Is main relief YES Is main relief valve used very often?