WinGD WARTSILA RT-flex58T-D, Maintenance Manual

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Maintenance
3403 − 1/A1
RT-flex58T-D
Winterthur Gas & Diesel Ltd.
6/ 7
4. Fitting the piston
Prior to fitting the piston, the following works must be carried out:
⇒ Remove piston rings with tensioning device 94338 (see 3425 − 1 ) and clean
piston exterior thoroughly (do not use any tools that might damage the sur-
face!).
Establish the height of the piston ring grooves (see Clearance Table 0330 − 1
’Piston and piston rings’).
⇒
Clean piston rings and measure them.
Remark: For refitting of used and new piston rings, follow strictly the instructions in
3425 − 1.
D When refitting used piston rings be sure to fit them in the same posi-
tions and grooves as removed.
D Fit the piston rings in such a manner that their marking TOP is on top.
Check the piston top surface (see 3403 − 4 ).
Measure bore of cylinder liner (see 2124 − 1 ) and carry out any needed recondition-
ing to lubricating grooves and scavenge ports (see 2124 − 3 ).
⇒ Actuate the cylinder lubrication until oil flows from all the lubricating points.
D Piston rod gland and both distance holders 94345 must be mounted on the
piston rod foot (see 2303 − 1 ).
D Locking devices GF 94343 must be properly fitted; thereby stop plate ’SP’
guides the device laterally on the cylinder liner when tightening the round nut
with round bar ’RS’.
⇒ Place insertion funnel GF 94342 on cylinder liner 7. Turn it so that the two wel-
ded plates ’PL’ of the insertion funnel are exactly located under the locking
devices.
D
Suspension device 94341 must be fastened to the top of the piston crown.
⇒ Smear piston rings, piston skirt, piston rod and running surface in cylinder
liner lavishly with bearing oil.
4.1 Placing and fastening insertion funnel and cylinder liner
G
018.647/09
7
SP PL
RS
GF 94342
GF 94343
160 mm
9
10
WCU00353
2013 / V2
Piston: Removal and Fitting
CHECK
CHECK