Removing Solenoid Valve; Disassembly; Inspection; Assembly - Danfoss 51 Series Service Manual

Service Manual
H1, H2, K1, K2 Controls
24
Series 51 Hydraulic Proportional Controls Service Manual

Removing Solenoid Valve

1. Using a 3/4 wrench, remove the coil nut from the solenoid cartridge valve (M1).
2. Remove the coil from the solenoid cartridge valve (M1). Using a 7/8 wrench, remove the solenoid
cartridge valve (M1) from the control housing.

Disassembly

1. Using a 1/4 internal hex wrench, remove plugs (M22, M18) (and M24 if present).
2. Remove and discard O-rings (M22A, M18A, and M24A).
3. Using a 4 mm internal hex wrench, remove screws (M14). Remove control (M10).
4. Remove and discard O-rings (M16 and M20).

Inspection

Inspect all components for damage or foreign material. Clean all parts and replace damaged
components as necessary.
Control Block
Legend
Item
M1 coil nut
M1 solenoid valve
M22, M18, M24
M14

Assembly

1. Using petroleum jelly to retain them, install O-rings (M16, M20).
2. Install the control housing to the multifunction block.
3. Install mounting screws (M14) to the multifunction block. Using a 4 mm internal hex wrench. Torque
to 6.4 N•m [4.7 lbf•in].
4. Lubricate and install new O-rings (M18A, M22A, and M24A).
5. Install plugs (M18A, M22A, and M24A). Using a 1/4 internal hex wrench, torque to 37 N•m [28 lbf•ft].

Installing Solenoid

1. Lubricate O-rings and install solenoid valve. Using a 7/8 wrench, torque to 78 Nm [58 lbf•ft].
2. Install coil and nut. Using a 3/4 wrench, torque to 1.2 Nm [0.9 lbf•ft].
11009446 • Rev BA • July 2014
P106 428E
Wrench size
3/4 inch
7/8 inch
1/4 internal hex
4 mm internal hex
Torque
6 Nm [4 lbf•ft]
12 Nm [6 lbf•ft]
31 Nm [27 lbf•ft]
6.4 Nm [4.7 lbf•ft]