How do I change the speed change valve of the loader?
The piston chamber of the old valve is provided with a pressure regulating ring restricting the piston movement, and a pressure regulating ring is removed, so that the piston can compress a spring more, and the pressure can be raised. No new pressure ring, but the core shaft pressure spool out more, can be set on one or several suitable washer, spring is compressed to make the same amount of increase, high pressure, and vice versa.
Pull out the spring to the hole, you can see the pressure regulating valve, the pressure regulating spring, one head on the pressure regulating valve core, and the other end of the top of the accumulator piston, of course, can be compressed by the piston.
BF25 type variable speed control valve is widely used in the domestic market of 5 ton loaders equipped with planetary gearboxes. This valve has a special pressure regulating spring is installed in the upper part of the valve rod cavity of the accumulator cavity, the plug bolt of accumulator is removed out of the accumulator piston, you can see the inside of a short thick and a thin spring each one, is that slender.
