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Cam lead is the number of mm plunger is lifted from bottom position when plunger at TDC

Lead of fuel pump is defined as number of mm , top of plunger lifted above spill ports when in TDC

Planning and preparation 

1. Inform master about job and instruct to person involve
2. Go through instruction Manuel 
3. Check measuring tools 
4. Risk assessment carried out, get work permit
5. Immobilization obtain
6. Stop engine. Shut starting air valve and drain the system
7. Open indicating cocks,  get propeller clearance and engage TG
8. Turn engine with lubrication on for 20 minutes
9. Stop Lo pump, fo supply pump and fo circuiting pump
10. Shut fo inlet and outlet vlv.
11. Shut fo heater valve, 
12. Drain off fuel carefully
13. Ensure personal safety 
14. Disconnect puncture valve
15. Disconnect suction valve

 

Procedure

1. 1. 1. 1. 1. FO rack max, VIT rack “zero”
            2. Reverse mechanism in ahead position
            3. Take out erosion plug both side
            4. Set the measuring tool
            5. Turn the engine in ahead direction until plunger cover spill port, take measurement “K”
            6. Compare reading with maker data 
            7. If not correct, may be tool not seated properly. Clean top of plunger and set again
            8. When K match, turn unit to TDC and note value. This is “A” value, pump lead! 
            9. Turn the engine in ahead direction until fuel pump roller is at lowest part of cam
            10. Push down the gauge, take reading. This is “b” value

 

• A-b= C, is the cam lead

 

1. 1. 1. 1. Confirm pump lead and cam lead with maker data

 

Cutting off the fuel for B&W

The steps are:

1. Operating the Puncture Valve
2. Lift the Fuel Pump Roller. 
3. Shut Fuel Oil Inlet Valve (Only for Maintenance purpose – Not During Running).

Manual actuation of Fuel Pump Lifting Device (148) activates Cylinder 149, which lifts & locks the Fuel Pump Roller, so that there is a gap (approx. 2 mm) between the roller and cam.

Cutting of fuel for Sulzer pump

1. 1. Lift fuel pump plunger by manual handle, 
   2. Close the inlet and outlet fuel valve.

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