Danfoss K Frame Series, Service Manual

Page 1: ...Service Manual K and L Frame Variable Motors Cartridge Mount powersolutions danfoss com...

Page 2: ...morrow 0402 April 2014 Danfoss layout DA July 2013 add anti cavitation valve CB October 2010 new back page CA November 2006 Added loop flushing valve B July 2004 First edition A Service Manual K and L...

Page 3: ...ure 12 Fluid and filter maintenance Recommendations 13 Troubleshooting Excessive noise and or vibration 14 System operating hot 14 Motor shifting irregularities 14 Minor repair Shaft seal replacement...

Page 4: ...eginning a service procedure Protect yourself and others from injury Take the following general precautions whenever servicing a hydraulic system W Warning Unintended machine movement Unintended movem...

Page 5: ...suggestion Lubricate with hydraulic fluid Apply grease petroleum jelly Apply locking compound Inspect for wear or damage Clean area or part Be careful not to scratch or damage Note correct orientation...

Page 6: ...mum displacement Minimum and maximum displacement can be set with fixed internal stops The large diameter servo piston allows smooth acceleration and deceleration with relatively large circuit orifici...

Page 7: ...Input shaft Servo piston Displacement control spool Filter High loop pressure Case pressure Charge low loop pressure Control pressure Inlet pressure Charge relief valve Motor displacement control valv...

Page 8: ...ations Parameter Unit L25 L30 L35 K38 K45 Displacement maximum cm3 in3 25 1 50 30 1 83 35 2 14 38 2 32 45 2 75 Weight cartridge and SAE B kg lb 15 4 34 Mass moment of inertia of rotating components kg...

Page 9: ...erature C F 40 40 82 180 104 220 Cleanliness ISO 4406 Class 18 13 or better Filtration efficiency suction filtration 35 44 75 10 1 5 charge filtration 15 20 75 10 10 Service Manual K and L Frame Varia...

Page 10: ...KC LC motors rely on external valving and orificing to regulate shift speeds You can achieve quick acceleration shift to min and slow deceleration shift to max simply by installing an orifice in the...

Page 11: ...ctions at the locations listed in the table drawing below Recommended gauge sizes are also listed Port information Port identifier Size Pressure obtained Gauge size bar psi X1 0 5625 18 UNF 2B Control...

Page 12: ...leaks 3 Fill the pump and motor housing with clean hydraulic fluid Pour filtered oil directly into the upper most case drain port 4 To ensure the pump and motor stay filled with oil install case drain...

Page 13: ...nge the fluid and filter per the vehicle machine manufacturer s recommendations or at these intervals Fluid and filter change interval Reservoir type Max oil change interval Sealed 2000 hours Breather...

Page 14: ...hanger if so equipped If the heat exchanger fails or becomes obstructed it may not meet the cooling demands of the system Ensure that heat exchanger is receiving adequate air flow and that the heat ex...

Page 15: ...i P104 251 Install the new shaft seal 1 Cover the shaft splines with an installation sleeve to protect the shaft seal during installation 2 Install a new shaft seal M003 with the cupped side facing t...

Page 16: ...6 Using a 11 16 in internal hex torque plugs E010 and E020 to 37 N m 27 lbf ft Anti Cavitation Valve Remove the anti cavitation valve The anti cavitation valve is installed into the high pressure por...

Page 17: ...Lubricate and install new O ring E063 on valve plug E061 3 If needed lubricate and install new O ring E020A on plug E020 4 Using a 5 16 inch internal hex wrench to install valve plug E061 into port w...

Page 18: ...Service Manual K and L Frame Variable Motors Cartridge Mount Notes 18 Danfoss July 2017 520L0631 AX00000042en US0402...

Page 19: ...Service Manual K and L Frame Variable Motors Cartridge Mount Danfoss July 2017 520L0631 AX00000042en US0402 19...

Page 20: ...lutions ApS Nordborgvej 81 DK 6430 Nordborg Denmark Phone 45 7488 2222 Danfoss Power Solutions US Company 2800 East 13th Street Ames IA 50010 USA Phone 1 515 239 6000 Danfoss Power Solutions Trading S...