803748 1 Mercury IMPELLER

Table 1
Required Tools
Tool Part Number Part Description Qty
A 207-5034(1) Stud Tensioner Tool Gp 1
8T-3035 Hydraulic Line 1
8T-0820 Hydraulic Pressure Gauge 1
350-7768(2) Electric Hydraulic Pump Gp (115v ) 1
350-7769(2) Electric Hydraulic Pump Gp (230v ) 1
9U-6600(2) Hand Hydraulic Pump 1
B(3) 301-5215(4) Stud Tensioner Tool Gp 1
229-9453 Pressure Gauge 1
227-6724(2) Electric Hydraulic Pump Gp
(120-VOLT) 1
227-8834(2) Electric Hydraulic Pump Gp
(240-VOLT) 1
191-5347(2) Hydraulic Pump Gp
(PNEUMATIC) 1
156-7167(2) Manual Hydraulic Pump 1
C 8T-0960 Handling Tool Group 1
D 134-0932 Main Bearing Driver 1
E 3P-1529 Circular Level 1
(1) Operating pressure is 65000 2400 kPa (9425 348 psi).
(2) More than one hydraulic pump is listed. Only one pump is necessary in order to carry out the job.
(3) Tooling B is CE-compliant.
(4) Operating pressure is 111500 3950 kPa (16170 575 psi).
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Illustration 1 g01302245Note: The bearing has a locating tab. When the bearing is viewed from the flywheel, counterclockwise rotation is required for the installation of the upper half of the bearing. Ensure that the tab is properly seated in the groove. Ensure that the tab does not break in the groove.Note: If the main bearing cap bolts were removed, use a tap to clean the threads in the cylinder block. Tighten the main bearing cap bolts to a torque of 100 20 N m (75 15 lb ft).
Use a clean cloth to wipe the upper half of main bearing (11). Apply clean engine oil to the main bearing. Use Tooling (D) to roll the upper half of the main bearing into the cylinder block. Note: On the C280-12 Engine, the Number 4 main bearing journal does not have an oil hole. Tooling (D) cannot be used to roll the upper half of the main bearing in the cylinder block. To install the Number 4 main bearing, protect the crankshaft and rap the side of the bearing with the tab with a narrow tool.Note: On the C280-16 Engine, the Number 5 main bearing journal does not have an oil hole. Tooling (D) cannot be used to roll the upper half of the main bearing in the cylinder block. To install the Number 5 main bearing, protect the crankshaft and rap the side of the bearing with the tab with a narrow tool.
Illustration 2 g00644087
Install thrust plates (12). If necessary, carefully pry the crankshaft to roll the thrust plates into position in the cylinder block. Note: Install the thrust plates on the rear main bearing for rear driven equipment. Install the thrust plates on the front main bearing for front driven equipment.
Illustration 3 g01302251
Use a clean cloth to wipe the lower half of main bearing (14) and the bore in the main bearing cap. Ensure that there is no thread lubricant on the lower half of the main bearing or on the main bearing cap. Install the lower half of main bearing (14) in the main bearing cap. Ensure that the tab on the back of the main bearing is engaged with the slot in the main bearing cap.
Apply clean engine oil to the lower half of main bearing (14). Be sure not to apply the engine oil to the back side of the main bearing.
Assemble the saddle bolts. Apply clean engine oil to the washer face and the threads prior to assembly.
Use Tooling (C) to raise the main bearing cap on the studs. The weight of each main bearing cap is approximately 70 kg (155 lb).
Ensure that dowel (13) engages with the hole in the cylinder block. The dowel should extend 10.0 0.5 mm (0.39 0.02 inch) from the main bearing cap.
Install the saddle bolts on the side of the tab on the main bearing cap hand tight.
Install the saddle bolts on the side opposite of the tab on the main bearing cap hand tight.
Install the washers and nuts to hold the main bearing cap. Tighten the nuts by hand. Remove Tooling (C) from the main bearing cap.
Remove the pins from the bearing cap.
Illustration 4 g00644075Note: The Collar Retainer, the Stud Tensi