Oil Pump: Inspection

INSPECT OIL PUMP ASSEMBLY
1. Inspect body clearance
  1. Push the driven gear to one side of the body. Using a feeler gauge, measure the clearance.
    Standard body clearance:
    
    0.075 to 0.150 mm (0.00295 to 0.00591 in.)
    
    Maximum body clearance:
    
    0.3 mm (0.012 in.)
    
    If the body clearance is greater than the maximum, replace the oil pump body sub-assembly.
    
    Fig 1: Inspecting Body Clearance
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect tip clearance
  1. Measure the tip clearance between the driven gear teeth and crescent-shaped part of the pump body.
    Standard tip clearance:
    
    0.004 to 0.248 mm (0.00016 to 0.00976 in.)
    
    Maximum tip clearance:
    
    0.3 mm (0.012 in.)
    
    If the tip clearance is greater than the maximum, replace the oil pump body sub-assembly.
    
    Fig 2: Measuring Tip Clearance Between Driven Gear Teeth And Crescent-Shaped Part Of Pump Body
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Inspect side clearance
  1. Using a steel straight edge and feeler gauge, measure the side clearance of both gears.
    Standard side clearance:
    
    0.02 to 0.05 mm (0.0008 to 0.0020 in.)
    
    Maximum side clearance:
    
    0.1 mm (0.004 in.)
    
    If the side clearance is greater than the maximum, replace the oil pump body sub-assembly.
    
    Fig 3: Measuring Side Clearance Of Both Gears
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Turn the drive gear with 2 screwdrivers and make sure it rotates smoothly.
  NOTE: Be careful not to damage the front oil pump oil seal lip.
  
  Fig 4: Turning Drive Gear With Screwdrivers
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY
1. Using a dial indicator, measure the inside diameter of the front oil pump body sub-assembly bushing.
  Maximum inside diameter:
  
  38.18 mm (1.5031 in.)
  
  If the inside diameter is greater than the maximum, replace the front oil pump body sub-assembly.
  
  Fig 5: Measuring Inside Diameter Of Front Oil Pump Body Sub-Assembly Bushing
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT STATOR SHAFT ASSEMBLY
1. Using a dial indicator, measure the inside diameter of the stator shaft assembly bushings.
  Maximum inside diameter:
  
  Front side:
  
  21.57 mm (0.8492 in.)
  
  Rear side:
  
  27.07 mm (1.0657 in.)
  
  If the inside diameter is greater than the maximum, replace the stator shaft assembly.
  
  Fig 6: Measuring Inside Diameter Of Stator Shaft Assembly Bushings
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002