3. Operate pump at full range of controls to ensure proper machine operation.
Charge pressure relief valve
Bypass valve
Removal
1. Using a 5/8 in. hex wrench, remove bypass valve (1001).
2. Remove and discard O-ring (1003) and backup ring (1002).
Inspection
Inspect the sealing surfaces of the pump for nicks or scratches. Inspect the bypass valve (1001)
sealing surface for nicks or scratches. Replace any damaged parts.
Reassembly
1. Lubricate and install new O-ring (1003) and backup ring (1002) onto bypass valve (1001).
2. Using a 5/8 in. hex wrench, install bypass valve (1001). Torque to 20 N•m [15 lbf•ft].
Service Manual
Series 40 M46 Variable Pumps
Minor repair
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Danfoss | September 2017 11026743 | AX00000027en-US0202 | 35
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