My 48 1 1/2 ton was parked for 25 years with the parking brake on. I tried pushing it around the farm with a tractor and loader pushing it's full weight down in the bed and it still would'nt break loose. Finally got it running and jacked the rear up on stands. Chained one wheel to the frame and popped the clutch several times until they broke loose. Then just run them for a while to clean the rust away
Scott

Scott Ward

2 1948 1.5-ton Loadmasters
The red one and The snow pusher
1 1950 3100
1 1955.1 Chevy 6500
1 1954 Chevy 6500 2-Ton
1 1955 1st Series COE 5700
1 1963 K20 (454)
1 1964 C10 (350)
1 1951 1.5-ton Dump Truck
1953 and a 1956 Ford F800

Raising a teenager is like trying to nail Jello to a tree!