With the major components removed, the transmission case is ready to be thoroughly cleaned out and inspected for wear or damage.
All assemblies that have been removed from the transmission, such as the oil pump, clutch packs, valve body, servos, etc., should all be disassembled, inspected, and rebuilt to the manufacturer's specifications. Always replace all seals and gaskets before reassembly. Look for any worn thrust washers and replace them as required. Check the condition and proper operation of all vacuum or electronic devices connected to the unit. The automotive type of torque converter is usually a welded unit and can only be flushed out, usually with solvent, and pressure tested. If this type of torque converter proves to be the problem, replace it. Because of size and expense, construction equipment torque converters are made to be disassembled and repaired.
Remember, the instructions for disassembly given here are for one type of transmission and only of one model of that type. The information is only to give you an idea of the complexities involved in automatic transmission overhaul, not to make you an expert in this field. Be sure to check the transmission serial numbers to ensure you are getting the correct overhaul parts.
Aside from size and weight, construction equipment automatic transmissions are the same in many respects as automotive automatic transmissions and only specific instructions for that particular unit will be different. For these "specific" instructions, go to your technical library and check out the correct repair manual.
Construction Mechanic 1, Naval Education and Training Program Management Support Activity, Pensacola, Fla, 1989
General Purpose Vehicle Mechanic, Extension Course Institute Air University, Gunter Air Force Station, Montgomery, Ala., 1985
U.S. Army TM 9-2320-289-34, Direct Support and General Support Maintenance Manual for Truck Cargo 1-1/4 ton 4 x 4, M1008, Department of the Army, Washington, D.C., 1983
U.S. Army TM-9-8000, Principles of Automotive Vehicles, Department of the Army, Washington, D.C., 1985
Wheeled Vehicle Clutches, Transmissions, and Transfers, Army Institute for Professional Development, Subcourse OD 1005, U.S. Army Ordnance Center and School, Aberdeen Proving Ground, Aberdeen, Md., 1986
William H. Crouse, Donald L. Anglin, Automotive Mechanics, 9th ed., McGraw-Hill Book Division, New York, 1985Continue Reading