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Bobcat Skidsteer Forums
General Bobcat Skidsteer Forum
An older 743 Hyrdaulic Pump issue
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<blockquote data-quote="Tazza" data-source="post: 8571" data-attributes="member: 82"><p>The only thing i would do would be get as much oil out of the system as possible. Without a pump i'm sure most has leaked out.</p><p>I would remove the large hoses from the motors and run say diesel and compressed air through them to get any much that may have entered. It wouldn't hurt when the hoses are off to push the machine a bit or jack it up and turn the tyres to get as much oil out as you can.</p><p>With the pump out, check your axle seals, are they wet at all? if so now is a good time to replace them and even replace the chain case oil while the pump is out as you have more access. If you just want it working again, skip this bit but i'd clean out the hoses and motors as i said earlier just to be sure.</p><p>Top up the tank and replace the hydro filter and you should be set.</p><p>Now, the port block, does it sit on the pump or has it got a hose that joins to the port block? if it has a hose its all good, but if there is a square block on the pump ensure the filter inside it is clean or even replaced.</p><p>Now, when its all hooked up it may take a bit to get the oil to start to flow. I started the machine for a few seconds then turned it off. I did that a few times till it got fluid through, not too long or you risk damaging the pump from lack of fluid. You could even hang the pump up and pour oil in directly from the charge port or the hydro pump. I did all this when my system was bone dry, pump out, all lines and cylinders out, oil cooler, the whole lot was empty. When you first start it, make sure its blocked and the wheels can turn.</p><p>The main thing with hydraulics is keep it super clean. Use engine oil in your machine NOT hydraulic oil.</p><p>Any other questions just yell, unfortunately i know 743's inside out...... Many hours work in repairing mine, but totally worth it! great little machine thats easy to work on.</p></blockquote><p></p>
[QUOTE="Tazza, post: 8571, member: 82"] The only thing i would do would be get as much oil out of the system as possible. Without a pump i'm sure most has leaked out. I would remove the large hoses from the motors and run say diesel and compressed air through them to get any much that may have entered. It wouldn't hurt when the hoses are off to push the machine a bit or jack it up and turn the tyres to get as much oil out as you can. With the pump out, check your axle seals, are they wet at all? if so now is a good time to replace them and even replace the chain case oil while the pump is out as you have more access. If you just want it working again, skip this bit but i'd clean out the hoses and motors as i said earlier just to be sure. Top up the tank and replace the hydro filter and you should be set. Now, the port block, does it sit on the pump or has it got a hose that joins to the port block? if it has a hose its all good, but if there is a square block on the pump ensure the filter inside it is clean or even replaced. Now, when its all hooked up it may take a bit to get the oil to start to flow. I started the machine for a few seconds then turned it off. I did that a few times till it got fluid through, not too long or you risk damaging the pump from lack of fluid. You could even hang the pump up and pour oil in directly from the charge port or the hydro pump. I did all this when my system was bone dry, pump out, all lines and cylinders out, oil cooler, the whole lot was empty. When you first start it, make sure its blocked and the wheels can turn. The main thing with hydraulics is keep it super clean. Use engine oil in your machine NOT hydraulic oil. Any other questions just yell, unfortunately i know 743's inside out...... Many hours work in repairing mine, but totally worth it! great little machine thats easy to work on. [/QUOTE]
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General Bobcat Skidsteer Forum
An older 743 Hyrdaulic Pump issue
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