WinGD WARTSILA RT-flex58T-D, Maintenance Manual

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Maintenance
1715 − 1/A1
RT-flex58T-D
Winterthur Gas & Diesel Ltd.
2/ 2
2. Checking the pre-tension
⇒ Clean the thread of the screw and the seating surface. Subsequently apply
MOLYKOTE to the thread.
⇒ Place pre-tensioning jack 94145 on the screw to be checked, and screw it
completely down with vent screw 8 open until there is only little or no clearance
at ’x’ (Fig. ’B’).
⇒ Connect pre-tensioning jack 94145 with HP oil pump 94931 as shown in Fig.
’B’, whereby one side of hydr. distributor 94934A must be plugged with plug
piece 94934E.
⇒ Close relief valve ’EV’ at the HP oil pump, then actuate the HP oil pump until
the oil comes out without bubbles from the opened vent screw 8.
⇒ Close vent screw 8, tension the screw with 150 bar and keep the pressure
constant.
Check with feeler gauge through slot ’KO’ if there is any clearance between nut 4
and its seating.
⇒ If there is no clearance, this means that the tensioning condition of the screw
has remained unchanged since the last check. The pressure can be released
to zero and the pre-tensioning jack removed.
Should a clearance be found, nut 4 must be tightened down onto its seating
with rod 94005D while the pressure is kept at 150 bar (check with feeler
gauge). Subsequently lower the pressure to zero.
B
8
1
94931 94932
94935A
4
94005D
KO
2
5
EV
94935
94934A
94934E
9
7
3
6
x
003.467/00
3. Loosening the screws
If the screws must be loosened, first screw on pre-tensioning jack 94145 complete-
ly, then loosen it by about
½
turn. Afterwards tension the screw with 170 bar , and
turn nut 4 back by one turn. Attention should be paid to ensure that pin 9 always
protrudes slightly compared with piston 6 on the pre-tensioning jack!
Engine Stays with Friction Shims: Checking the Pre-tension
2013
CHECK