willie59
Administrator
Occasionally a member finds their Bobcat loader control valve making an oily mess of the bottom of their machine because it needs new seals for the control valve spools. Some simply take the machine to their local Bobcat dealer for repair, but others consider doing the repair themselves and save a little money, to which they ask if this is a job that they can do. If one has a bit of mechanical skills, it certainly is a project that can be done. Here are the basic steps to accomplish the repair. This was done on a 773 G Series loader. There may be differences on older models, such as a 743, but the differences have little affect on the procedures for doing this repair. On the wheel loaders, it's a little easier because you can remove a side plate to access the front of the control valve easy. On the track machines, such as T190, the track frame gets in the way of working through side panel so all parts of the repair are done on the topside with cab raised. Worst part about doing this repair is the stuff in the way of accessing the control valve components, but that just comes with working on a Bobcat, pretty much everything you need to work on with these machines has something in your way. Sorry about a few fuzzy pics, I had to get in a few awkward positions to take pics and it was hard to hold camera still while flash working. So, lets re-seal a control valve. If your working on a wheel machine, take the time to clean out the debris and gunk from underneath the drive motor on the control valve side by reaching through the removed side plate hole between wheels. At the rear of that compartment is a hole in the belly of the machine. Place an oil drain pan under the hole to contain the oil that will drain from control valve while making repairs. Track machines have the hole in a different location.
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