Repair Procedures for a Sundstrand Sauer Danfoss M46 Tandem Pump
Repair Procedures for Tandem Pump
Before doing repairs to the pump, take out the external components:
Auxiliary Mounting Pad (where applicable)
Charge Relief Valve
Charge Check/High Pressure Relief Valves
And you need to separate the tandem pump into two groups and take out the charge pump parts and pilot ring.
Then remove these parts, the pumps sections may need repairing.
The sections of a tandem pump are mounted “back to back”, each section will have a different valve plate installed. A CW rotation unit will have a clockwise valve plate installed in the plate in the rear section. A counterclockwise unit will have a CCW valve plate installed in the front section.
Following repair, install the charge pump parts or pilot ring and rejoin the pump sections parts back in. Making sure to clean all parts, lubricate them and to replace all gaskets and O Rings before reinstalling them. Do not need foreign particles in your unit.
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