HYDRAULIC OIL FILTER CHECK
1.The hydraulic oil filter should be replaced after first 25 hours of operation.
2.After first replacement, it should be replaced after 250 hours operation (2 months), every 500 hours of operation (4 months), and every 1,000 hours of operation thereafter.
3.When the suction resistance exceeds 254mmHg (oil temperature in operation is 140 degrees F), replace filter.
4.To remove the oil filter, wind a cloth around the filter to prevent slipping (Figure 35).
5.Tie a rope securely around the filter (Figure 35).
MDR-9D — MAINTENANCE
HDRAULIC AIR EXTRACTION
1.After filling hydraulic oil tank with oil, loosen the oil hose joint and check that oil is enough to reach the oil suction and outlet ports in the hydraulic transmission. Tighten the hose joint securely after checking.
2.Loosen the charge relief valve located on the front side of the hydraulic transmission (Figure 37).
Figure 35. Cloth and Rope Around Filter
6. Forcibly pull the rope to remove the filter (Figure 36).
Figure 37. Loosening Charge Relief Valve
3.Check that oil flows out from the valve hole.
4.Replace the charge relief valve tightly.
5.With the travel and vibrator levers in neutral position, start the engine and idle at low speed for 3 to 5 minutes.
6.Check the forward and reverse rotation of the output shaft by moving the travel lever slowly to its forward and reverse positions.
7.Check the oil level gauge and make sure that there are no air bubbles mixed in the oil. After checking, operate the roller slowly at first then at full speed.
8.When oil level in the tank is low, replenish oil up to the specified level, and screw the cap securely with a wrench.
9.If bubbles remain in the oil or foam is found, air is being sucked through the suction side and should be checked.
Figure 36. Filter Removal
7.Immediately replace with new filter, screwing it on by hand to avoid hydraulic oil leak.
NOTE | Use only genuine Mikasa |
| replacement oil filters (10 |
| micron filter paper. Do not use |
|
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