This might need to be in the tech section but What years were hydraulic cylinders used? I have a 62 with one and having a lot of trouble. Has anyone try to change on over to a linkage type or should i keep working on the cylinders? Thanks

1947 1Ton stepside
1962 K20 Fleetside
1962 C40 12' flatbed
1963 C10 Stepside
1963 C20 Fleetside
1965 C10 Stepside (Daily Driver)
1973 C20 Stepside fire truck
1973 C50 Utility truck Houston Power & Light