3828765 Volvo.Penta Pressure drop indica

4N8735 Oil Pump (Two Section Gear)
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.
Section A:Rotation (seen from the drive end) counterclockwiseTest 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 Section B: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 (new) ... 20.320 0.005 mm (.8000 .0002 in) Bore in bearings for drive shaft (new) ... 20.361 0.008 mm (.8016 .0003 in)(2) Diameter of idler shaft (new) ... 20.320 0.005 mm (.8000 .0002 in) Bore in bearings for drive shaft (new) ... 20.361 0.008 mm (.8016 .0003 in)(3) 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)(4) Diameter of drive shaft (new) ... 22.217 0.005 mm (.8747 .0002 in) Bore in bearings for drive shaft (new) ... 22.258 0.008 mm (.8763 .0003 in)(5) Diameter of idler shaft (new) ... 22.217 0.005 mm (.8747 .0002 in) Bore in bearings for drive shaft (new) ... 22.258 0.008 mm (.8763 .0003 in)(6) 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)(7) Diameter of drive shaft (new) ... 22.217 0.005 mm (.8747 .0002 in) Bore in bearings for drive shaft (new) ... 22.258 0.008 mm (.8763 .0003 in)(8) Diameter of idler shaft (new) ... 22.217 0.005 mm (.8747 .0002 in) Bore in bearings for drive shaft (new) ... 22.258 0.008 mm (.8763 .0003 in) (9) 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)
Pump Body - Section A(10) Install bearings to depth ... 1.52 mm (.060 in)(11) Bearing junction.(12) Position of bearing junction from the centerline through bearing bores ... 30 15°
Spacer Plate(13) Install bearings to depth ... 0.76 mm (.030 in)(14) Oil holes.(15) With oil holes on horizontal centerline slots on bearings should be located as shown.
Pump Body - Section B(16) Bearing junction.(17) Position of bearing junction from the centerline through bearing bores ... 30 15° Install bearings so they are even with outside of pump body.4N0733 Oil Pump
Used On Engines Without BrakeSaver
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
Pump Cover(4) Bearing junction.(5) Position of bearing junction from the centerline through bearing bores ... 30 15°Install bearings so they are even with outside of pump body and even with FACE A of pump cover.