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.

Hydraulic Pump Bobcat 773 6675343
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Bobcat 630 640 Rear Stabilizer Hydraulic Cylinder Seal Kit 7137771
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6504959 New Bobcat Loader Lift Hydraulic Cylinder Seal Kit 520 530 533 540 543
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Hydraulic Gear Pump Bobcat 753G Skid Steer Loader 6672513
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High Flow Hydraulic Gear Pump Bobcat 853 Skid Steer Loader 6673918
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Hydraulic Gear Pump Bobcat 773G Single Speed Skid Steer Loader 6675343 6
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Hydraulic Gear Pump Bobcat 773 Single Speed Skid Steer Loader 6675343 66
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Hydraulic Pump Bobcat 863G 2 Speed Standard Flow Skid Steer Loader 6675660
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Hydraulic Pump Bobcat 873G 2 Speed Standard Flow Skid Steer Loader 6675660
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Prowler HD Inverted Hydraulic 30in Log Wood Splitter Skid Steer Attachment
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6816352 New Bobcat Excavator Hydraulic Bucket Cylinder Seal Kit 435 Rod
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Bobcat Filter Hydraulic part number 6683039
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NEW BOBCAT HYDRAULIC BLADE CYLINDER  6628548
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Bobcat 641 Hydraulic Drive Motor
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Bobcat 542B Hydraulic Drive Motor
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Bobcat 542 Hydraulic Drive Motor
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Bobcat 540 Hydraulic Drive Motor
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Bobcat 453 Hydraulic Drive Motor
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Bobcat 825 Hydraulic Drive Motor 1 Speed
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Bobcat 853 Hydraulic Drive Motor
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Hydraulic Drive Motor for Bobcat OEM 6722529
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Bobcat 863 Hydraulic Drive Motor
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Hydraulic Drive Motor For Bobcat OEM 6722426
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$1,025.00
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Hydraulic Single Speed Drive Motor for Bobcat OEM 6669566
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Hydraulic Drive Motor for Bobcat OEM 6681605
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Hydraulic Drive Motor for Bobcat OEM 6680104
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admin posted at 2009-12-23 Category: Heavy Equipment