yes chances are you can get a seal kit for this
like Mr Thrasher suggested we need more info
-Truck Model and Serial Number
-Mast Number (production number)
-How many stages is the mast? (2 stage? 3 stage?)
-Then there are part numbers stamped on the cylinders (they may be electronically etched into the cylinder tube) so some cleaning may be required to see these numbers)
-OAH (overall height) of the mast assy, this is generally on the data plate.

I know it's a lot to ask for but gotta have it thanks to the engineers at NACCO ;o)