Inspection; Assembly - Danfoss 51 Series Service Manual

Service Manual
JA Control
38
Series 51 Hydraulic Proportional Controls Service Manual
6. Using a 7/16 wrench remove pin/plugs (M84).
7. Remove and discard O-rings (M84A).
8. Remove spool (M32).
9. Using a 1/8 internal hex wrench remove 13 plugs (M24).
10. Remove and discard O-rings (M24A).
11. Using a 3/8 internal hex wrench remove plug (M23).
12. Remove and discard O-ring (M23A).
13. Remove screws (M150 and M151) using a:
•
8mm internal hex wrench for the 80 cc and 110cc motors
•
10 mm internal hex wrench for the 160cc and 250cc motors.
14. Remove the control from the endcap.
15. Remove 4-way valve assembly (F32).
C
Caution
If repair is necessary to the 4-way valve, threshold spring, and ramp spring components, refer to Series
51 and Series 51-1 Motors Service Manual 11008567.
16. Remove and discard O-rings (F324).
17. Remove O-rings (G38), (G36) and (G42) or gasket (N240).
18. Using a 3 mm internal hex, remove orifices (T4, T6, U7).

Inspection

1. Inspect the housing (M1) for signs of corrosion or damage.
2. Replace any damaged parts.

Assembly

1. Using a 3 mm internal hex, install orifices (T4, T6, U7). Torque to 3.7 Nm [2.7 lbf•ft].
2. Lubricate and install O-rings (F324).
3. Install the 4-way valve assembly (F32).
4. Using petroleum jelly, lubricate and install a new O-rings (G38, G36 and G42) or install gasket (N240).
5. Install the control assembly to the end cap.
6. Install screws (M150 and M151).
7. Torque screws (M150 and M151) to:
•
78 N•m [58 lbf•ft]. Use an 8mm internal hex wrench for 80 cc and 110cc motors.
•
110 N•m [81 lbf•ft]. Use a 10 mm internal hex for 160cc and 250ccmotors.
8. Install spool (M32).
9. Lubricate O-ring (M23A). Using a 3/8 internal hex wrench, install plug (M23). Torque to 25 Nm [18
lbf•in].
10. Lubricate and install 13 O-rings (M24A). Using an 1/8 internal hex wrench, install 13 plugs M24).
Torque to 6 Nm [4 lbf•in].
11. Lubricate and install O-rings (M84A). Using a 7/16 wrench, install plugs (M84). Torque to 12 Nm [9
lbf•in].
12. Install the PCOR spool assembly (M20).
13. Install spring (M18). Install adjuster (Z*).
14. Lubricate and install O-ring (M16).
15. Install lock nut (M14). Torque to 54 Nm [40 lbf•in].
11009446 • Rev BA • July 2014