WÄRTSILÄ RT-flex50-D, Maintenance Manual

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Maintenance
5556−1/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
9/ 9
4.8 Final assembly
⇒
Assemble guide piston 7, provided that parts have been removed (Fig. ’E’).
Check the axial clearances according to the Clearance Table 0330−1 ’Fuel Pump’.
⇒
Lubricate O-ring 41 and push snap ring 14 with grease into the concentric
position (Fig. ’E’).
⇒
Lubricate the pump plunger.
⇒
Attach the guide piston to a lifting tackle by means of two eye bolts ’RC’ (Fig.
’E’), and insert it carefully in the housing, taking care that the guide groove in
the guide piston comes to rest opposite the bore provided for guide pin 9 (Fig.
’D’).
⇒
Remove eye bolts ’RC’, mount the fitting & dismantling device 94551, and
press guide piston 7 downwards until guide pin 9 allows to be fitted. In case the
guide pin touches the side of the guide groove, it can be brought into the right
direction by turning pressure piece ’DS’ (Fig. ’D’).
⇒
Release the fitting & dismantling device and remove it.
Check regulating rack 25 for easy movement.
⇒
Place O-rings 40 in the grooves at lower housing 6 (Fig. ’B’).
5. Preserving
If a pump has to be stored over a long period of time, the spaces carrying fuel oil
must be filled with vaseline oil and plugged with plastic stoppers.
Furthermore, lubricate the pump and protect it against humidity and soiling by
wrapping it suitably.
The pumps must be stored in upright position.
6. Fitting of a fuel pump
⇒
Turn the engine until the cam belonging to the fuel pump concerned is on the
base circle.
Check whether the seating surfaces as well as the guide parts of engine housing
and pump are in a faultless condition.
⇒
Lubricate the guide parts and fit the fuel pump, taking care of the locating pin
and the regulating shaft (do not use any jointing agent).
⇒
Screw in screws 3 with lubricated threads and head seating surfaces, and
tighten them crosswise in equal steps with a total value of 600 Nm (Fig. ’A’).
⇒
Check the setting of the regulating linkage ( 5801−1 ).
⇒
Fit all pipings. For fitting the fuel pressure piping see 8752−1 .
⇒
When putting the pump into operation, watch for possible leakages or abnor-
mal temperature rise. Fit the casing when everything is in order.
2010
Fuel Pump: Dismantling and Assembling
CHECK
CHECK
CHECK