How to Disassembly Pump for Kubota U48-4 Excavator

This instruction show you guide on how to disassemble pump for Kubota U48-4 excavator.

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Related Contents:

Takeuchi Excavator Workshop EPC+Service Manual 2018 PDF Files

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Procedures:

1.Remove the gear pump (46).

  • Tool to use: M8 hex socket

Gear Pump (47) Socket head bolt

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2.Lift the input axle up and clamp the pump in a vise.

IMPORTANT

  • Take care not to scratch the suction or discharge ports in the vise.

(49) Socket head bolt

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3.Loosen the bolt and remove flange (3).

CAUTION

  • If the flange is difficult to remove, tap lightly on it with a plastic hammer and take it apart.
  • Don’t pinch your fingers between the flange and the case.
  • Tool to use: M10 hex socket

(3) Flange

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4.Remove the screw (13) and the bushing (12).

  • Tool to use: M3 hex socket

(12) Bushing

(13) Screw

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5.Remove the snap ring (6) from the flange (3).

CAUTION

  • Take care so the snap ring does not go flying.
  • Tool to use: Snap ring pliers

(3) Flange

(6) Snap ring

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6.Remove the oil seal and the needle bearing from the flange.

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7.Remove the gasket (10).

CAUTION

  • Be careful not to cut your fingers on the gasket.

(10) Gasket

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8.Remove the thrust washer (9) from the shaft (7).

(7) Shaft

(9) Thrust washer

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9.Remove the swash-plate (24).

(24) Swash-plate

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10.Remove the shaft (7).

(7) Shaft

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11.Remove the cylinder block ASSY .

  • Cylinder Block ASSY Components

Cylinder block, collar, spring, collar, snap ring, pin, piston ASSY, retainer holder, retainer plate

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12.Remove the thrust washer (8).

(8) Thrust washer

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13.Remove the valve plate (14).

(14) Valve plate

IMPORTANT

  • Do not scratch the valve plate.

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14.Remove the pins (30) & (73).

(30) Pin

(73) Pin

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15.Remove the pin(26).

(26) Pin

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16.Remove the nut (45).

IMPORTANT

  • Measure the width of L before removing the nut.
  • Tool to use: Monkey wrench

(45) Nut

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17.Remove the valve ASSY (34).

(34) Valve ASSY

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18.Remove the valve ASSY (51).

  • Tool to use: M5 hex socket

(51) Valve ASSY

(66) Socket head bolt

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19.Remove O-rings (27) & (77).

(27) O-Ring

(77) O-Ring

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20.Remove the orifice (78) of the valve ASSY.

  • Tool to use: M3 hex socket

(78) Orifice

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More repair case for Kubota,please refer to:Kubota Trouble Repair

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