Inspection; Assembly - Danfoss 51 Series Service Manual

Service Manual
HS Control
22
Series 51 Hydraulic Proportional Controls Service Manual
Disassembly
M12
M17
M17A
4. Remove plug (M17) using a 1/4 internal hex wrench.
5. Remove and discard O-ring (M17A).

Inspection

1. Inspect the housings for damage or foreign material.
2. Check internal passages for contamination. Clean passages if necessary.

Assembly

1. Using petroleum jelly to retain it, install a new O-ring (M12).
2. Install the HS valve housing on to the multifunction block.
3. Using a 4 mm internal hex, install screws (M10). Torque to 6.4 Nm [4.7 lbf•ft].
4. Lubricate and install a new O-ring (M17A).
5. Using a 1/4 internal hex wrench install plug (M17). Torque to 37 N•m [28 lbf•ft].
Refer to Optional Multifunction block
11009446 • Rev BA • July 2014
M10
E101 489E
on page 16 for multiblock repair.