10. Remove servo control orifice (G020).
P109024
Left coil orientation
Right coil orientation
C129
H030
*QC120
C124
C123
G020
QC135
QC130
QC125
C300
C107
C122
C125
C128B
C128A
C128
*C200
C120
C128C
* Included in overhaul seal kit
Item
Description
Wrench size
Torque
G020
Servo control orifice
3 mm internal hex
2.7 N•m [2 lbf•ft]
H030
Gain orifice
2,5 mm internal hex
2.7 N•m [2 lbf•ft]
C129
Plug 5/16"
1/8“ internal hex
6.2 N•m [4.67 lbf•ft]
C107
Plug 7/16"
3/16" internal hex
13.7 N•m [9.9 lbf•ft]
C128C
Nut 9/16"
17 mm exter hex
23.7 N•m [17.5 lbf•ft]
C120
Solenoid cartridge
17 mm exter hex
25.75 N•m [19 lbf•ft]
QC125
Coil plastic nut
26 mm 12 pt socket
3.5 N•m [2 lbf•ft]
C300
Screws
4 mm internal hex
6.5 N•m [4.75 lbf•ft]
Inspection
1. Inspect the pressure limiter for wear. Check for contamination and damage to the O-rings, replace if
necessary.
2. Inspect the control housing for damage. Check the spool bores for excessive wear. Remove debris
from orifices if necessary.
3. Carefully inspect the spool. Ensure the sealing lands are free of nicks , burrs and scratches. Check the
ends that contact the spring guides for wear. Replace the spool if necessary.
4. Check the spool for free (smooth) movement in housing bore.
5. Check the orifices (H030 and G020) for contamination, and for cavitation damage.
6. Check the solenoid cartridge for damage, bending, free pin movement.
7. Check the coil for damage Check the plastic plug for contamination.
8. Check the coil connector for contamination or overheat marks, deformation, connector pins are not
damaged or bent, or missing. Replace the coil if necessary.
9. Check the control o-rings for damage, or cracks and replace if necessary.
10. Clean and lubricate all spools, bores, and seals with a light coating of hydraulic oil.
Service Manual
Series 45 Frame K2 Open Circuit Axial Piston Pumps
Minor repair
©
Danfoss | April 2017
AX00000301en-US0101 | 35