Danfoss Series 40 M46 Tandem

Inspection
Inspect the machined surface on the control. If any nicks or scratches are found, replace the damaged
component.
Reassembly
1. Install new gasket (805) and filtration cover (801).
2. Using a 1/2 hex wrench, install three bolts (806). Torque to 30 Nm [22 ft•lb].
3. Lubricate and install O-ring (810A) onto plug (810). Using a 11/16 hex wrench, install plug (810).
Torque to 37 Nm [27 ft•lb].
Pressure filtration adapter removal/installation
805
801
810
11/16 in
810A
P106 673E
806
1/2 in
Charge pump
If the pump has an auxiliary pump attached, remove the auxiliary pump and connecting shaft before
removing the auxiliary pad.
Removal
1. Using a 3/4 hex wrench remove nut (2144). Remove bracket (2146).
2. Using a 1/2 12 point hex wrench, remove bolts (2147). Pull to separate front and rear pump housings.
3. Unthread tie rod (2145).
4. Remove and discard O-rings (2407, 2408, and 2150).
5. Remove gerotor cover (2304) and gerotor (2403).
6. Remove pin (2404), coupling (2142), and pin (2405).
Note the location of pin (2404) for reassembly. It can be assembled for right hand or left hand pump
rotation.
Service Manual
Series 40 M46 Tandem Variable Pumps
Minor repair
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Danfoss | September 2017 11029852 | AX00000030en-US0202 | 29