partsandservice
Senior Member
Cat 420d fdp10924. This machine has lost boom lift , tilt and steering unless using a rear function at the same time. All the primary and secondary resolvers in the loader valve have been replaced. The last valve that operated properly in the order is the right stabilizer. The stabilizer valve us different from the others and does not have the same resolvers. It does have a compensator vavle ,which I removed and swapped with left out rigger and problem remains. Any ideas where to look next?