Electric Controls - Danfoss 45 Frame K2 Series Service Manual

Service Manual
Series 45 Frame K2 Open Circuit Axial Piston Pumps
Minor repair

Electric Controls

© Danfoss | April 2017
Disassembly
1. Remove four screws (C300).
2. Remove the control and discard the four O-rings (C200).
3. Remove set screws (C102), PC adjusting plug (C138) with O-ring (C138A), springs (C134, C135), and
seat (C133). Discard the O-ring if it is damaged.
4. Remove plug (C103). Remove PC spool (C132). Note orientation of the spool for reassembly.
5. Remove plug (G030), and orifice (G020).
6. Remove LS adjusting plug (C118), springs (C114, C115), and seat (C113).
7. Remove plug (C104), and spool (C112). Note the orientation of the spool for reassembly.
8. Remove four screws (C151). Remove the manifold (C152) and discard the two interface O-rings
(C154).
9. For electric proportional controls only:
Remove the electric control manifold drain orifice (C149).
10. Remove plug (C153). Remove the cartridge valve nut (C125), electric solenoid (C155), and cartridge
valve (C150) from the electric control manifold.
Control assembly
C125
C300
C155
C150
C149
C152
C151
C113
C115
C153
C114
C118
Inspection
1. Inspect the adjusting plugs for wear at the tips and where they contact the springs; replace as
necessary.
2. Inspect the springs and spring guides for wear or damage; replace as necessary.
3. Carefully inspect the spools. Ensure the sealing lands are free of nicks and scratches. Check the ends
that contact the spring guides for wear. Replace spools as necessary.
4. Inspect the control housing for damage. Check the spool bores for excessive wear.
5. Remove debris from orifices if necessary. Ensure the servo control orifice backup plug is clean, and
remove debris if necessary.
6. Clean all parts and lubricate spools, springs, guides and new O-rings with clean hydraulic fluid.
C103
C104
C132
C112
C102
C154
G030
G020
C200
C133
C135
C134
C138A
P108 668E
C138
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