Checking The Oil Pump

OIL PUMP

EAS24960

CHECKING THE OIL PUMP                                               Inner-rotor-to-outer-rotor-tip
1. Check:                                                           clearance
 • Oil pump driven sprocket                                           Less than 0.12 mm (0.0047 in)
 • Oil pump housing                                                 Limit
 • Oil pump housing cover                                             0.20 mm (0.0079 in)
   Cracks/damage/wear → Replace the defec-                          Outer-rotor-to-oil-pump-housing
   tive part(s).                                                    clearance
2. Measure:                                                           0.090–0.150 mm (0.0035–0.0059
 • Inner-rotor-to-outer-rotor-tip clearance “a”                       in)
                                                                    Limit
 • Outer-rotor-to-oil-pump-housing clearance
                                                                      0.220 mm (0.0087 in)
   “b”                                                              Oil-pump-housing-to-inner-and-
 • Oil-pump-housing-to-inner-rotor-and-outer-                       outer-rotor clearance
   rotor clearance “c”                                                0.03–0.08 mm (0.0012–0.0032 in)
   Out of specification → Replace the oil pump.                     Limit
                                                                      0.15 mm (0.0059 in)

                                                         3. Check:
                                                          • Oil pump operation
                                                            Rough movement → Repeat steps (1) and
                                                            (2) or replace the defective part(s).

                                                         EAS24970

                                                         CHECKING THE RELIEF VALVE
                                                         1. Check:
                                                          • Relief valve body “1”
                                                          • Relief valve “2”
  1. Inner rotor                                          • Spring “3”
  2. Outer rotor                                          • O-ring “4”
  3. Oil pump housing                                       Damage/wear → Replace the defective
                                                            part(s).

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