WinGD WARTSILA RT-flex58T-D, Maintenance Manual

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Maintenance
3403 − 3/A1
RT-flex58T-D
Winterthur Gas & Diesel Ltd.
1/ 4
Tools: Key to Illustrations:
1 Suspension device 94341 1 Piston crown 8 Centering pin
1 Piston supporting device 94350 2 Spraying plate with oil pipe 9 Screw
2 Jacking screws 94363 2a Spraying nozzle 10 Locating pin
2 Jacking screws 94364 3 Locking element 11 Strap
1 Impact ring spanner AF46 4 Screw with locking plate 12 Screw
1 Torque wrench 5 Elastic screw 13 O-ring
6 Piston rod 14 O-ring
7 Piston skirt 15 Locating pin
1. General
Should the dismantling of a piston become necessary (cleaning the cooling cham-
ber, reconditioning the ring grooves etc.), then this can be carried out as described
below. For this purpose the piston is to be placed in the piston supporting device
94350 according to 3403 − 1 .
When fitting and removing elastic screws 5 the piston rod must be steadied against
rotation with two straps 11 of supporting device and two locking screws 4.
Attention! When dismantling or assembling a piston take particular care that the
spraying nozzles are not damaged.
2. Dismantling of a piston
⇒ Remove locking elements 3 with screw and locking plate 4 from all elastic
screws 5 (Fig. ’A’).
⇒ Loosen and remove all elastic screws 5.
⇒ Insert both jacking screws 94363 into the two opposite bores for locking
screws 4 in the piston rod head (Fig. ’A’), and drive them in until they press
against centering pin 8 (Fig. ’C’). Equally tighten the two jacking screws in
small steps, until the piston crown is separated from the piston rod.
D
When raising piston crown 1 take particular care not to damage spraying
nozzles 2a.
⇒ Remove both jacking screws from piston rod head.
Following the removal of piston crown separate piston skirt 7 from piston rod 6 as
described below:
⇒ Loosen and remove both screws 9 (Fig. ’A’).
⇒
Using two jacking screws 94364 (see Fig. ’D’) the piston skirt can be sepa-
rated from the piston rod.
D While raising the piston skirt pay attention that locating pin 10 does not jam.
For the removal of spraying plate with oil pipe 2 (Fig. ’A’) loosen and remove first
screws 12 with locking plates. The spraying plate with oil pipe can then be pulled as
a complete unit from piston rod 6.
D Attention! Do not damage the spraying nozzles.
Piston
Dismantling and Assembling
2013