Wartsila RT-flex50-D User Manual

Maintenance
3403−1/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
1/ 8
Tools: Key to Illustrations:
1 Piston ring tensioning device 94338 1 Piston rod 15 Waisted stud
2 Pre-tensioning jacks 94340 2 Crosshead pin 16 Piston skirt
1 Suspension device 94341 3 Waisted stud 17 Holder
2 Distance plates 94341a 4 Nut 18 Cylinder liner
4 Distance plates 94341b 5 Vent screw 19 Slotted countersunk-
1 Insertion funnel 94342 6 Centring pin head screw
2 Distance holders 94345 7 Piston 20 Water guide jacket
1 Cover plate 94345d 8 Cylinder
1 Tap 94348 9 Platform support
1 Piston supporting device 94350 10 Support BN Limiting groove
1 HP oil pump 94931 11 Hinged cover EV Relief valve
1 Connection block 94934 12 Piston rod gland KO Slot
1 Hydr. distributor 94934a 13 Compression shim RS Round bar
2 Coupling elements 94934g 14 Screwed connection SA Gap
3 HP hoses 94935
Overview
1. General 1/8...............................................
2. Loosening the waisted studs of piston foot fastening 1/8....
3. Tensioning the waisted studs of piston foot fastening 3/8....
4. Removal of piston 4/8......................................
5. Fitting the piston 7/8.......................................
6. Leak test 8/8..............................................
1. General
Remark: Pay attention to:
− General Guidelines for Lifting Tools 0012−1.
− General Application Instructions 9403−4 for hydraulic pre-tensioning jacks.
D 2124−3 ’Removing wear ridge’ in cylinder liner at every piston removal.
D 2708−1 ’Removal of cylinder cover’ and draining cylinder cooling water.
Attention! The piston may not be transported with built-on piston rod gland (gland
for short).
Attention! The supporting device 94350 can be used for piston overhauling
work at calm sea only, however, in no case this may serve as storage place
during the voyage!
Moreover, always bear in mind, that the passage between engine and supporting
device is limited (e.g. as possible escape route) on the platform.
2. Loosening the waisted studs of piston foot fastening
⇒ Turn piston to B.D.C.
⇒ Clean the threads of waisted studs 3 and the area around nuts 4 (Fig. ’A’).
⇒ Place both pre-tensioning jacks 94340 crosswise on waisted studs 3 to be
loosened, and completely screw them on (arrangement according to Fig. ’A’)
with opened vent screw 5 (Fig. ’B’).
⇒ Both pre-tensioning jacks are to be loosened by approx. ½ turn (gap ’SA’ in
Fig. ’B’).
⇒ Connect both pre-tensioning jacks to HP oil pump 94931 as shown in (Fig.’A’).
P
iston
R
emoval and Fitting
2010

Wartsila RT-flex50-D Specifications

General

Brand	Wartsila
Model	RT-flex50-D
Category	Engine
Language	English