It will take two kits to rebuild the regulator. It takes the diaphragm and a brass kit. The Brass kit will come with the parts to replace the seat for the low pressure valve. If you've never rebuilt one I do not recommend it. The low pressure seat will need glued into place once the seat is verified. You would be ahead by replacing the regulator as an assembly. By the time you buy the kits and labor to rebuild and then it doesn't work your back to ground zero you will have more money in to all the parts than the complete assembly. Go to Toyota Forklift Dealer Locator and with your ZIP code you can find the closest dealer to get parts. You will need the Model and Serial number.