40003 38 Mercruiser SCREW

(1) Diameter of drive shaft and idler shaft (new) ... 22.217 0.005 mm (.8747 .0002 in)Bore in bearings for drive shaft and idler shaft (new) ... 22.258 0.008 mm (.8763 .0003 in)(2) Length of gears (new) ... 79.375 0.025 mm (3.1250 .0010 in)Depth of bores for gears (new) ... 79.502 0.020 mm (3.1300 .0008 in)(3) 2S2760 Spring (oil pressure relief valve):Length under test force ... 117.9 mm (4.64 in)Test force ... 490 27 N (110 6 lb)Free length after test ... 152.9 mm (6.02 in)Outside diameter ... 27.00 mm (1.063 in)(4) Distance from the end of the idler shaft to gear face ... 36.50 mm (1.437 in) Maximum temperature of gear at installation ... 316°C (600°F)(5) Distance from the end of the drive shaft to gear face ... 53.00 mm (2.087 in) Maximum temperature of gear at installation ... 316°C (600°F)
Pump Body(6) Pump body bearing joints.(7) Position of pump body bearing junction from the centerline through bearing bores ... 30 15 degrees(8) Install bearings in bottom of gear bores to a depth of ... 0.30 mm (.002 in)
Pump Cover(9) Bearing junction.(10) Position of bearing joint from the centerline through bearing bores ... 30 15 degrees(11) Install bearings in bottom of gear bores to a depth of ... 0.76 0.25 mm (.030 .010 in)
Before operation, the pump must be lubricated with clean engine oil and the pump must turn freely by hand or damage to parts can be the result.
Two Section
Rotation of drive gear (as seen from drive end) ... clockwise Make reference to Timing Gears to find oil pump drive gear.
Later Oil Pump ShownScavenge pump end
(1) Diameter of drive shaft and idler shaft (new) ... 20.320 0.005 mm (.8000 .0002 in)Bore in bearings for drive shaft and idler shaft (new) ... 20.361 0.008 mm (.8016 .0003 in)(2) Length of gears (new) ... 65.07 0.05 mm (2.562 .002 in)Depth of bores for gears (new) ... 65.197 0.020 mm (2.5668 .0008 in)Spacer assembly
(3) Diameter of drive shaft and idler shaft (new) ... 22.217 0.005 mm (.8747 .0002 in)Bore in bearings for drive shaft and idler shaft (new) ... 22.258 0.008 mm (.8763 .0003 in) Earlier oil pump has spacer for spring (6) installed inside the cover and the relief valve plunger does not have a friction damped piston ring.Pump body assembly (Section B)
(4) Length of gears (new) ... 79.375 0.025 mm (3.1250 .0010 in)Depth of bore for gears (new) ... 79.502 0.020 mm (3.3100 .0008 in)(5) Diameter of drive shaft and idler shaft (new) ... 22.217 0.005 mm (.8747 .0002 in)Bore in bearings for drive shaft and idler shaft (new) ... 22.258 0.008 mm (.8763 .0003 in)(6) 2S2760 Spring (oil pressure relief valve):Length under test force ... 117.9 mm (4.64 in)Test force ... 490 27 N (110 6 lb)Free length after test ... 152.9 mm (6.02 in)Outside diameter ... 27.00 mm (1.063 in) (7) Bearing joints (scavenge pump body).(8) Position of bearing joint from the centerline through bearing bores ... 30 15 degrees(9) Install bearings in bottom of gear bores to a depth of ... 1.52 0.25 mm (.060 .010 in)
Spacer Assembly(10) Spacer assembly bearing joints.(11) Slots must be in location shown when small hole in bearing is aligned with centerline of splash holes (12).(12) Oil splash holes (lubricating holes).(13) Install spacer assembly bearings from Face A to a depth of ... 0.76 0.25 mm (.030 .010 in)
Pump Body(14) Pump body bearing joints.(15) Position of pump body bearing junction from the centerline through bearing bores ... 30 15 degreesInstall bearings so they are even with outside of pump body. Rotation of pump must be free when turned by hand.