Maintenance2728−1/A1 RT-flex50-D
Wärtsilä Switzerland Ltd
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4. Grinding-in
D Slightly damaged seat faces may be ground in (lapped) manually.
D Badly worn seat faces must first be machined and then ground in (lapped)
manually.
Remark: The valve spindle has an angle of 91_, however, the valve seat angle
amounts to 90_.
5. Assembling
Assemble the valve in reverse sequence to the dismantling.
⇒ Clean all parts and smear them lightly with oil.
⇒ Apply MOLYKOTE G paste to thread of spindle 6 and tighten nut 9 with 140
Nm.
After completing the assembly (without cover 3) check the easy movement of the
spindle by moderately tapping the upper end of the spindle several times with a
lead block in an axial direction; the spindle must jump every time back on the seat.
⇒ Place a new O-ring 16 into housing 2 and oil it lightly.
⇒ Assemble cover 3 with control valve 13 and tighten screws 10.
6. Fitting in cylinder cover
⇒ Place a new joint ring 15 on the shoulder of the bore in the cylinder cover.
⇒ Smear bore in cylinder cover lightly with oil and fit the assembled starting
valve.
⇒ Apply Never-Seez NSBT-8 to the threads of screws 11, fit and pre-tighten
them crosswise with 80 Nm. Starting from this position, tighten the screws by
a further angle of 90_.
Starting Valve: Removal, Fitting and Dismantling, Grinding-in and Assembling
2010
CHECK
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