879172103 Mercruiser VALVE, Regulating

Illustration 1 g00566332
Single-section pump
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.
(1) Diameter of shafts ... 22.217 0.005 mm (0.8747 0.0002 inch)Diameter of bores in cover for shafts ... 22.258 0.008 mm (0.8763 0.0003 inch) (2) Length of gears ... 79.375 0.025 mm (3.1250 0.0010 inch)Depth of bores for gears ... 79.502 0.020 mm (3.1300 0.0008 inch) (3) 2S-2760 Spring Length under test force ... 117.9 mm (4.64 inch) Test force ... 150 8 N m (110 6 lb ft) Free length after test ... 152.9 mm (6.02 inch) Outside diameter ... 27 mm (1.063 inch)
Illustration 2 g00566395
Pump body (4) BearingsInstall the bearings so the bearings are even with the outside of the pump body. (A) Position of bearing joint from the centerline through bearing bores ... 30 15 degreesType 2
Illustration 3 g00285526
Two-section pump
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.
(A) Body assemblyTest on test stand with SAE 10W oil at 49 °C (120 °F) Rotation from the drive end ... counterclockwise Pump speed ... 2550 RPM Output ... 193 L/min (51 US gpm) (1) Drive shaft Diameter of the drive shaft (new) ... 20.320 0.005 mm (0.8000 0.0002 inch) Bore in bearings for drive shaft (new) ... 20.361 0.008 mm (0.8016 0.0003 inch) (2) Idler shaft Diameter of idler shaft (new) ... 20.320 0.005 mm (0.8000 0.0002 inch) Bore in bearings for idler shaft (new) ... 20.361 0.008 mm (0.8016 0.0003 inch) (3) pump gears Length of gears (new) ... 57.158 0.025 mm (2.2503 0.0010 inch) Depth of bores for gears ... 57.285 0.020 mm (2.2553 0.0008 inch) (B) Body assemblyTest on test stand with SAE 10W oil at 49 °C (120 °F) Rotation from the drive end ... counterclockwise Pump rpm ... 2550 rpmFlow specifications for low pressure Output ... 272 L/min (72 US gpm) Pressure ... 310 kPa (45 psi)Flow specifications for high pressure Output ... 144 L/min (38 US gpm) Pressure ... 560 kPa (81 psi) (4) Drive shaft Diameter of drive shaft (new) ... 22.217 0.005 mm (0.8747 0.0002 inch) Bore in bearings for drive shaft (new) ... 22.258 0.008 mm (0.8763 0.0003 inch) (5) Idler shaft Diameter of idler shaft (new) ... 22.217 0.005 mm (0.8747 0.0002 inch) Bore in bearings for idler shaft (new) ... 22.258 0.008 mm (0.8763 0.0003 inch) (6) Gears Length of gears (new) ... 79.375 0.025 mm (3.1250 0.0010 inch) Depth of bores for gears (new) ... 79.502 0.020 mm (3.1300 0.0008 inch) (7) Drive shaft Diameter of drive shaft (new) ... 22.217 0.005 mm (0.8747 0.0002 inch) Bore in bearings for drive shaft (new) ... 22.258 0.008 mm (0.8763 0.0003 inch) (8) Idler shaft Diameter of idler shaft (new) ... 22.217 0.005 mm (0.8747 0.0002 inch) Bore in bearings for idler shaft (new) ... 22.258 0.008 mm (0.8763 0.0003 inch)
Illustration 4 g00285527
Oil Pressure Relief Valve (9) 2S-2760 Spring Test force ... 489 24 N (110.0 5.5 lb) Length under test force ... 117.9 mm (4.64 inch) Free length after test ... 152.9 mm (6.02 inch) Outside diameter ... 27 mm (1.063 inch)
Illustration 5 g00527397
Pump Body (14) Position of bearing joint from the centerline through bearing bores ... 30 15 degreesNote: Install the bearings so that the bearings are flush with the outside of the pump body.