Loop Flushing Valve - Danfoss DDC20 Service Manual

Service Manual
DDC20/24 Axial Piston Pumps
Minor repair

Loop flushing valve

© Danfoss | August 2019
DDC20/24 loop flushing valve removal
1. Remove the loop flushing valve plugs (J220/J230). Remove and discard O-rings (J220A/J230A).
2. Use a magnet to remove the springs (H150) and spring guides (H200).
3. Use a magnet to remove the loop flushing spool (H100).
DDC20/24 loop flushing valve inspection
1. Inspect the springs (H150). Replace the springs if they are warped or bent.
2. Inspect the loop flush spool (H100), replace it if it is worn or damaged.
3. Inspect plugs and spring guides for wear.
4. Install new O-rings to plugs before assembly.
DDC20/24 loop flushing valve assembly
1. Lubricate and insert the loop flushing spool (H100) into endcap.
Ensure the spool moves freely in its bore.
2. Install the spring guides (H200) and springs (H150).
3. Lubricate and install the O-rings (J220A/J230A) on the plugs.
4. Thread the loop flushing valve plugs (J220/J230) into the endcap and torque plugs per table.
DDC20/24 Remove loop flushing valve
J230
J230A
H150
H200
Loop flushing valve plugs
Item Wrench size
J220/J230 11/16 inch
J220
H100
H200
H150
J220A
Torque
35 N•m [26 lbf•ft]
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