Danfoss Series 40 M46 Tandem

3. Operate pump at full range of controls to ensure proper machine operation.
Bypass valve
1002
1003
1001
5/8 in
20 Nm [15 ft•lb]
1002
1003
1001
5/8 in
20 Nm
[15 ft•lb]
Manual displacement control
Removal
1. Using a 3/8 hex wrench, remove screw (1210). Remove manual control spool assembly from pump
housing.
2. Using a 1/2 hex wrench, remove lock nut (1213). Remove tooth lock washer (1235), handle (1215),
neutral return bracket (1216), and spring (1214) from spool (1207).
Mark the location of neutral return bracket (1216) before disassembly.
3. Remove and discard backup ring (1209) and O-ring (303) from spool (1207).
4. Remove sleeve (1402). Remove and discard backup ring (1208) and O-ring (302).
Inspection
Inspect all parts of control assembly. Replace any damaged parts. Inspect spools for grooves,
scratches, and other damage. If spools are damaged, replace them. Inspect sleeve bore in housing for
damage.
Reassembly
1. Lubricate and install O-ring (302) and backup ring (1208) onto sleeve (1402). Lubricate and install
sleeve (1402) into motor housing.
When installing sleeve (1402), ensure that sleeve groove engages spring pin on swashplate
2. Lubricate and install O-ring (303) and backup ring (1209) onto spool (1207).
Service Manual
Series 40 M46 Tandem Variable Pumps
Minor repair
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Danfoss | September 2017 11029852 | AX00000030en-US0202 | 35