Repair; Disassembly - Danfoss 51 Series Service Manual

Service Manual
HZ, HA, HB, HE Controls

Repair

Series 51 Hydraulic Proportional Controls Service Manual

Disassembly

1. Remove screws (M22) using a:
•
8 mm internal hex wrench for 80 cc and 110cc motors
•
10 mm internal hex wrench for 160 cc and 250 cc motors.
2. Remove control block ( M1HZ).
3. Remove and discard O-rings (G38, G42, and G36) or gasket (G420).
4. If present, remove plugs (M16) using a ¼ inch internal hex wrench (HZ controls only).
5. Remove and discard O-rings ( M16A).
6. If present, remove orifice (M12) using a 5mm internal hex wrench (HZ controls only).
7. If present, remove shuttle valve (M10) (HZ controls only).
If necessary, tap the housing on a solid surface to remove the shuttle valve.
8. Remove plugs (M18) using a 1/8 inch internal hex wrench.
9. Remove and discard O-rings (M18A).
Disassembly
M1HZ
M18
11009446 • Rev BA • July 2014
M14
M10
M12
P106 423E
N240
19