Bobcat Hydraulic

Will putting regular motor oil into a hydraulic reservior to raise the oil level up to normal hurt anything ?

We have a bobcat skid steer loader on the farm that was built in the mid 70's. Works pretty good for its age and we don't push it hard but it has it's share of leaks mostly at the seals. We were told by a mechanic that works on them that if you didn't have any hydraulic oil on hand you could put W30 motor oil in the reservior to bring it back up to proper level. Thats been a couple of years ago and now motor oil of any viscosity is being put into it. Will this damage any of the system; seals ,pump,valves etc.? The whole system will take about 13 gals. and I'm concerned that when I change the filter and top off with oil its just going to be a waste of oil and filter unless the whole system is flushed out.

Yup. The mechanic just wanted extra work. You will be back with a broken hydraulic system pump. You do that in emergency situations. It is not meant to stay in there. The whole system has to be flushed out and cleaned. that means parts taken apart and washed clean of oil. Brake fluid(hydraulic fluid is not oil). Oil will harden seals and neoprene causing them to leak even more. Also oil is corrosive to flexible hoses and they will crack. Oil will also burn.

Bobcat Hydraulic Hose 6959117 Hose LT133 Trencher
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BC012102 New Bobcat Skid Steer Loader Single Hydraulic Gear Pump 753 753L
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7135551 Tilt Hydraulic Cylinder Seal Kit Bobcat 743 Skid Steer Loader
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Bobcat Hydraulic Oil Filter 751 753 763 773 7753 863 864 873 883 963 Skid Steer
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Bobcat Female 3 8 Hydraulic Flat Face Drain Line Replacement Coupling 6679838
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Bobcat Hydraulic Oil Filter S100 S130 S150 S160 S175 S185 S205 Skid Steer Loader
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Hydraulic Gear Pump Bobcat 753 Skid Steer Loader 6672513
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Hydraulic Gear Pump Bobcat 763 Skid Steer Loader 6672513
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Hydraulic Gear Pump Bobcat 773 Skid Steer Loader 6672513
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High Flow Hydraulic Gear Pump Bobcat 753 Skid Steer Loader 6667382
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High Flow Hydraulic Gear Pump Bobcat 763 Skid Steer Loader 6667382
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Bobcat Hydraulic Filter T110 T140 T180 T190 T200 skid steer loader 6661248 IL
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Hydraulic Drive Motor For Bobcat OEM 6599718
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Hydraulic Drive Motor For Bobcat OEM 6664889
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Bobcat 620 Hydraulic Vane Pump
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Bobcat 7149093 Long Strong Hydraulic Arm
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Bobcat 6692337 Hydraulic Filter S650 S570 S590 S750
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Hydraulic Pump Bobcat 864 Single Speed Skid Steer Loader 6673911 6672829
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Hydraulic Pump Bobcat T200 Single Speed Skid Steer Loader 6673911 667282
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admin posted at 2009-12-23 Category: Heavy Equipment