1. Using a 3/16 internal hex wrench, remove screws (1203 and 1204) or (1226 and 1224).
2. Remove control housing (1201) or control housing (1223) and manifold (1225). Remove and discard
O-rings (1220 and 304) or (1227, 1228, and 1229).
Inspection
Inspect control spool for scratches, grooves, and other damage. If spool is damaged, or control is
otherwise suspected of malfunction replace entire control unit. Inspect sleeve bore in housing for
damage.
Reassembly
1. Lubricate and install O-rings (1220 and 304) onto control housing (1201) or lubricate and install O-
rings (1227 and 1228) onto manifold (1225) and O-rings (1223A) onto control housing (1223).
Lubricate and install control housing (1201) or manifold (1225) onto pump housing aligning sleeve
groove with spring pin on swashplate.
Service Manual
Series 40 M46 Tandem Variable Pumps
Minor repair
©
Danfoss | September 2017 11029852 | AX00000030en-US0202 | 37
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