Inspection; Assembly; Solenoid Assembly - Danfoss 51 Series Service Manual

Service Manual
A7, L1, L2, L7 Controls
Series 51 Electrohydraulic Proportional Controls Service Manual
5. Using a 5mm internal hex wrench remove orifice (M12)
6. Remove check-valve assembly (M10).
If necessary, tap the housing on a hard surface to remove the check valve assembly.
7. Remove screws (M22)
8. Remove control housing. Remove and discard O rings (G36, G38, and G42) or gasket (G420).
9. Remove spool (F32).
C
Caution
Read BLN-10181 for repair instructions for the F32 4-way valve, threshold spring, and ramp spring
components, if their repair is necessary
10. Remove and discard O-rings (F324).

Inspection

1. Inspect the housing and spools for wear, damage or foreign material.
2. Check internal passages for contamination and clean them if necessary.

Assembly

1. Lubricate and install O-rings (F324).
2. Install valve (F32).
3. Using petroleum jelly, lubricate and install new O-rings (G38, G42, G36), or install gasket (N240).
4. Position control on end cap.
5. Install screws (M22). Torque per listing in table.
6. Lubricate and install new O-rings (M18A).
7. Install plugs (M18). Using a 1/8-inch internal hex wrench torque plugs to 6 N•m [4 lbf•ft].
8. Install the check valve assembly (M10).
9. Install orifice (M12). Using a 5mm internal hex, torque orifice to 11 N•m [8 lbf•ft].
10. Install new O-ring (M16A).
11. Install the plug (M16). Using a 1/4-inch internal hex wrench torque the plug to 37 N•m [27 lbf•ft].

Solenoid Assembly

1. Lubricate and install O-ring (M1A). Install solenoid.
2. Using a 3/4 inch thin wrench, torque solenoid to 47 Nm [35 lbf•ft].
3. Install coil with O-rings.
4. Install plastic nut. Tighten by hand.
11009448 • Rev BA • July 2014 23