Danfoss H1 Service Manual

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Contents

3. Lubricate and install a new O-ring (J260) onto seal carrier (J275). Press a new seal (J250) into the sealcarrier. Press the seal until it is flush within +0.12mm [0.005 in] or -0.72 mm [0.0028 in] of the inside lipof the carrier: see illustration.4. Cover the shaft with a protective sleeve while installing the seal carrier. Hand press the seal carrierinto the housing. Ensure the seal carrier clears the retaining ring groove in the housing. Remove theprotective sleeve.5. Install the retaining ring (J300). Ensure the inside diameter of the retaining ring is greater then 68mm[2.68 in] after installation.Positioning seal in seal carrierP106 498ESealPress flush to this surface+0.12 mm [ 0.005 in] / -0.72 mm [ 0.028 in]Charge Pump (045/053 only)Position pump with front shaft pointing downward. Attach securely to a proper work stand. If an auxiliarypump is attached, remove auxiliary pump before servicing charge pump.Removal1. Remove screws (K351), and hangers (K975).2. Remove running cover (K301). Remove and discard seal ring (K250).3. Using a 10 mm internal hex, remove screws (K400). Remove cover (K101).4. Remove and discard seal (S300).5. Remove geroter cover (S200).Note the position of the alignment pin (S500) in the housing. The alignment pin position is differentfor clockwise or counterclockwise rotation.6. Remove and disassemble charge pump assembly, [shaft (K201), pin (S500), geroter (S100), two clips(K205)].7. Remove and discard gasket (K151). Remove alignment pins (K450).8. If it is necessary to remove housing (K300), use a 10 mm internal hex to remove screws (K350).9. Remove housing (K300).10. Remove and discard seal (K150).Inspection1. Inspect all machined surfaces. If you find any nicks or scratches, replace the component.2. Inspect geroter and cover for wear or damage. If wear or damage is found, replace geroter kit.3. Inspect shaft for wear or damage. If found, replace shaft.4. Inspect journal bearings in aux pad and housing. If worn or damaged, replace journal bearings or auxpad or housing assembly.Refer to Replacing charge pump journal bearings on page 58 for journal installation dimensions.Service ManualH1 45/53/60/68 Tandem Closed Circuit Axial Piston PumpsMinor repair56 | © Danfoss | June 2018 520L0928 | AX00000103en-US0303