Inspection
1. Inspect the adjusting plugs for wear at the tips and where they contact the seat; 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. Clean all parts and lubricate spools, springs, guides, and new O-rings with clean hydraulic fluid.
Reassembly
1. Install the PC spool (C132), spherical end first, into the PC bore. Using a new O-ring (C103A), install the
plug (C103). Torque the plug (C103) to 12 N•m [9 lbf•ft].
2. Place the two PC springs (C134, C135) onto the spring guide (C133) and install into the PC bore. Place
a new O-ring (C138A) onto the PC adjusting screw and thread it into the PC bore until flush, then
make another full turn. Install and torque the PC set screw (C102) to 9 N•m [7 lbf•ft].
For PC only controls, skip steps 3 through 5.
3. Install the LS spool (C112), spherical end first, into the LS bore. Using a new O-ring (C105A or C106A),
install the plug (C105 or C106). Torque the plug (C105 or C106) to 12 N•m [9 lbf•ft].
4. Using a new O-ring (C104A), install the plug (C104). Torque the plug to 12 N•m [9 lbf•ft].
5. Place the two LS springs (C114, C115) onto the spring guide (C113) and install into the LS bore. Place
a new O-ring (C118A) and back-up rings (C118B) onto the LS adjusting screw and thread it into the LS
bore until flush, then make another full turn. Install and torque the LS set screw (C102) to 9 N•m [7
lbf•ft].
6. Using petroleum jelly to retain them, install 4 new interface O-rings (C200) in the recesses on the
control housing.
7. Install the control assembly onto the endcap using the 4 screws (C300). Torque the screws to 6 N•m [5
lbf•ft]. Torque screws in a criss-cross pattern and re-torque the first screw to ensure proper torque
retention.
Service Manual
Series 45 Frame K2 Open Circuit Axial Piston Pumps
Minor repair
©
Danfoss | April 2017
AX00000301en-US0101 | 31
Содержание 45 Frame K2 Series
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