Once you get the pump apart it seems to be the same as the U.S version,although i wouldnt know for sure. the delivery valve and spring look identical to the one in the hanes manual.there's a little steel piston looking thing with the valve inside and a washer and the spring on top, all sits in the area beneath the delivery tube.foir reassembley Just balance the spring on top of the steel piston with valve inserted and the copper washer centered on the steel piston , then place the delivery tube over the assembly and screw it back in.torque to 34-37 ftlbs. I didnt have any problems with leaks. The synthetic O rings were easy to find at the local hydraulic place. You will definitly want to replace those while you are in there. It is all easy as long as you have the spline socket. It is the same one used for the 603 engine as well as others. It is in the tool rental program. also the tabs have to go on in the same order as they were previously it dosnt fit otherwise. you will figure it out easily. there may be diagrams that are simular to this setup in the 603 manual,but I dont know. It is all self explanitory once everything is apart.it is easy to replace the rest of the delivery tube o-rings, as all you need to do is remove the tube slide off the o ring and replace. dont mess with the other valves and springs and it is a sinch going back together.