Maintenance
1112
−
1/A1
RT-flex58T-D
Winterthur Gas & Diesel Ltd.
2.
Checking of the pre-tension
⇒
Clean the threads of the foundation bolts and the seating surfaces. Subse-
quently apply MOLYKOTE G paste to the threads.
⇒
Place pre-tensioning jack 94145 on the foundation bolt to be checked. Screw
it completely down with vent screw 12 open until there is only little or no clear-
ance at ’x’.
⇒
Connect pre-tensioning jack with HP oil pump 94931. Fit plug piece 94934E
on one side of Hydr. distributor 94934A.
⇒
Close relief valve ’EV’ and actuate the HP oil pump until oil flows bubble-free
at the vent screw.
⇒
Close the vent screw. Tension the foundation bolt with
1000 bar
and keep
pressure constant.
Control pin 11 must always protrude over the top edge of piston 14. When the con-
trol pin is flush with the top edge of the piston, the maximum stroke of the piston is
reached. Therefore do not continue to operate the pre-tensioning jack!
Check with feeler gauge through slot ’KO’ if there is any clearance between nut 6
and its seating.
⇒
If there is no clearance, this means that the tightening condition of the founda-
tion bolt has remained unchanged since the last check. The pressure can be
released to zero with relief valve ’EV’ and the pre-tensioning jack removed.
Should a clearance be found, nut 6 must be tightened down onto its seating
with round bar ’RS’ while the pressure is kept at
1000 bar
(check with feeler
gauge). Subsequently lower the pressure to zero.
Remark:
If the foundation bolts have completely loosened and have to be ten-
sioned again, then all foundation bolts have to be pre-tensioned first with
600 bar
(1
st
step)
. Subsequently all foundation bolts are to be tensioned with
1000 bar
(2
nd
step)
.
14
6
RS
KO
1
2,3,4
x
12
13
94931
EV
94935
D
11
94934A
94932
002.854/99
94934E
94935A
Checking the Foundation Bolts
2013
CHECK
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