39078 Mercury DRIVE SHAFT (SHORT)(39-SEE NOTE IN BLOCK COMMENTS)(40)

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.
Rotation (seen from the drive end) ... counterclockwiseTest on test stand, with SAE 10W oil at 49°C (120°F)Output ... 272 liter/min (72 U.S. gpm) At a pressure of ... 310 kPa (45 psi)With pump at ... 2550 rpmOutput ... 144 liter/min (38 U.S. gpm) At a pressure of ... 560 kPa (81 psi)With pump at ... 2550 rpm(1) Diameter of drive shaft ... 22.217 0.005 mm (.8747 .0002 in) Bore in bearings for drive shaft ... 22.258 0.008 mm (.8763 .0003 in)Diameter of idler shaft ... 22.217 0.005 mm (.8747 .0002 in)Bore in bearings for idler shaft ... 22.258 0.008 mm (.8763 .0003 in)(2) Length of gears ... 79.375 0.025 mm (3.1250 .0010 in) Depth of bores for gears ... 79.502 0.020 mm (3.1300 .0008 in)(3) 2S2760 Spring (oil pressure relief): 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)
Pump Body(4) Bearing junction.(5) Position of bearing junction from the centerline through bearing bores ... 30 15 degreesInstall bearings so they are even with outside of pump body.Two Section Gear
Scavenge pump endRotation (seen from the drive end) ... counterclockwise Test on test stand, with SAE 10W oil at 49°C (120°F)Output ... 193 liter/min (51 U.S. gpm) with pump at ... 2550 rpm(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) ... 57.158 0.025 mm (2.2503 .0010 in) Depth of bores for gears (new) ... 57.285 0.020 mm (2.2553 .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) Pump body assemblyRotation (seen from the drive end) ... counterclockwise Test on test stand, with SAE 10W oil at 49°C (120°F)Output ... 272 liter/min (72 U.S. gpm) at a pressure of ... 310 kPa (45 psi)with pump at ... 2550 rpmOutput ... 144 liter/min (38 U.S. gpm)At a pressure of ... 560 kPa (81 psi)With pump at ... 2550 rpm(4) Length of gears ... 79.375 0.025 mm (3.1250 .0010 in) Depth of bores for gears ... 79.502 0.020 mm (3.1300 .0008 in)(5) Diameter of drive shaft and idler shaft (new) ... 22.217 0.005 mm (.8747 .0002 in) Bore in bearings for drive 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)
Scavenge Pump(7) Bearing junction.(8) Position of bearing junction 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 junctions.(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 junctions.(15) Position of pump body bearing junction from the centerline through bearing bores ... 30 15 degrees.Install bearings so they are even with outside of pump body.