Danfoss Series 40 M46 Tandem

2. Lubricate and install new O-ring (106) onto plug (166). Using a 1-1/4 hex wrench install relief valve
plug (166). Torque to 174 Nm [128 ft•lb].
High pressure relief valves
P106 668E
106
165
1103
166
1-1/4 in
174 Nm [128 ft•lb]
106
165
1103
166
1-1/4 in
174 Nm [128 ft•lb]
Charge pressure relief valve
Replace the charge pressure relief valve components if they are damaged or otherwise suspected of
failure. See Charge pressure relief valve on page 19, for adjustment instructions.
Removal
1. Using a 1 inch hex wrench, remove charge pressure relief plug (102). Remove and discard O-ring
(103).
2. Remove shims (101), spring (104), and charge pressure relief valve (105).
Inspection
Inspect the sealing surfaces of the pump for nicks or scratches. Inspect the relief valve (105) sealing
surface for nicks or scratches. If the relief valve (105) is damaged, replace it.
Reassembly
1. Install charge pressure relief valve (105), spring (104), and shims (101).
2. Lubricate and install O-ring (103) onto plug (102). Using a 1 inch hex wrench, install plug (102).
Torque to 108 Nm [80 ft•lb].
Service Manual
Series 40 M46 Tandem Variable Pumps
Minor repair
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Danfoss | September 2017 11029852 | AX00000030en-US0202 | 33