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Summary of Contents for Danfoss K Frame Series
- Page 1 Service Manual K and L Frame Variable Motors, Cartridge Mount powersolutions.danfoss.com...
- Page 2 Changed July 2017 Updated to Engineering Tomorrow 0402 April 2014 Danfoss layout July 2013 add anti-cavitation valve October 2010 new back page November 2006 Added loop flushing valve July 2004 First edition 520L0631 | AX00000042en-US0402 © Danfoss | July 2017...
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Page 3: Table Of Contents
Service Manual K and L Frame Variable Motors, Cartridge Mount Contents Introduction Overview......................................4 Safety precautions....................................4 Symbols used in Danfoss literature............................4 Design........................................6 The System circuit.................................... 6 Technical specifications Overview......................................8 Features and options..................................8 Specifications..................................... 8 Operating parameters..................................8 Fluid specifications..................................8 Features Output shafts....................................10... -
Page 4: Overview
ASC. Danfoss ASCs are trained by the factory and certified on a regular basis. You can locate your nearest ASC using the distributor locator at www.powersolutions.danfoss.com. - Page 5 Be careful not to scratch or damage Note correct orientation Mark orientation for reinstallation Torque specification Press in – press fit Pull out with tool – press fit Cover splines with installation sleeve 520L0631 | AX00000042en-US0402 | 5 © Danfoss | July 2017...
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Page 6: Design
Series 42 medium power axial piston pump with manual displacement control. Control pressure applied through an external control valve shifts the motor to minimum displacement; spring force returns the motor to maximum displacement in the absence of control input. 520L0631 | AX00000042en-US0402 © Danfoss | July 2017... - Page 7 Servo piston Swashplate Input Charge relief valve shaft Output shaft Charge Check valves pump w/high pressure relief valves and bypass plunger Filter Pump Cylinder swashplate block Slipper assembly P104 250E 520L0631 | AX00000042en-US0402 | 7 © Danfoss | July 2017...
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Page 8: Technical Specifications
5200 5050 Case pressure continuous bar [psi] 2 [29] maximum 6 [87] Fluid specifications Ratings and data are based on operation with premium petroleum-based hydraulic fluids containing oxidation, rust, and foam inhibitors. 520L0631 | AX00000042en-US0402 © Danfoss | July 2017... - Page 9 °C [°F] -40 [-40] 82 [180] 104 [220] Cleanliness ISO 4406 Class 18/13 or better Filtration efficiency suction filtration β =75 (β ≥1.5) 35-44 charge filtration β =75 (β ≥10) 15-20 520L0631 | AX00000042en-US0402 | 9 © Danfoss | July 2017...
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Page 10: Features
While all motors will have the brake release port, not all gearboxes are compatible with this motor feature. Consult your gearbox manufacturer for suitability and compatibility. If your gearbox is not compatible with this feature, simply leave the port plugged. 520L0631 | AX00000042en-US0402 10 | © Danfoss | July 2017... -
Page 11: Pressure Measurements
600 [10 000] Brake release port [0.4375]-20 PER SAE Twin radial port locations Control port (X1) Brake release port Case drain port System port (B) System port (A) P104 249E 520L0631 | AX00000042en-US0402 | 11 © Danfoss | July 2017... -
Page 12: Initial Start-Up Procedures
9. Shut down the prime mover and remove the pressure gauge. Replace plug at the charge pressure gauge port. 10. Check the fluid level in the reservoir; add clean filtered fluid if necessary. The motor is now ready for operation. 520L0631 | AX00000042en-US0402 12 | © Danfoss | July 2017... -
Page 13: Fluid And Filter Maintenance
Dispose of used hydraulic fluid properly. Never reuse hydraulic fluid. Change filters whenever the fluid is changed or when the filter indicator shows that it is necessary to change the filter. Replace all fluid lost during filter change. 520L0631 | AX00000042en-US0402 | 13 © Danfoss | July 2017... -
Page 14: Troubleshooting
Shifting pressure at full energized valve coil (1500mA) result in slow or no shift conditions. needs to be at 20-32bar [290-464psi] or system input pressure, whichever is lower. Replace shifting valve when measured pressure is differing. 520L0631 | AX00000042en-US0402 14 | © Danfoss | July 2017... -
Page 15: Minor Repair
2. Using a 1/4 in hex wrench remove plug (E042). 3. Remove O-rings (E020B, E042A, and E010B). 4. Using pliers, remove centering springs (E041, E020C, and E010C). 5. Remove spring retaining washers (E020D and E010D). 520L0631 | AX00000042en-US0402 | 15 © Danfoss | July 2017... -
Page 16: Inspect The Components
3. Using a 5/16 in internal hex wrench remove plug (E020). Remove and discard O-ring (E020A). Anti-cavitation valve Counter-Clockwise rotation shown. Anti-cavitation valve is installed in port A. E020 E020A E011 E012 E063 E061 P108 720E 520L0631 | AX00000042en-US0402 16 | © Danfoss | July 2017... -
Page 17: Inspect The Components
Torque to 80 N•m [59 lbf•ft]. 5. If needed using a 5/16 inch internal hex wrench to install plug (E020) into port without relief valve (E011). Torque to 80 N•m [59 lbf•ft]. 520L0631 | AX00000042en-US0402 | 17 © Danfoss | July 2017... - Page 18 Service Manual K and L Frame Variable Motors, Cartridge Mount Notes 520L0631 | AX00000042en-US0402 18 | © Danfoss | July 2017...
- Page 19 Service Manual K and L Frame Variable Motors, Cartridge Mount 520L0631 | AX00000042en-US0402 | 19 © Danfoss | July 2017...
- Page 20 Phone: +86 21 3418 5200 Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without changes being necessary in specifications already agreed.
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