Maintenance
9403−4/A1
RT-flex58T-E
Winterthur Gas & Diesel Ltd.
1/ 6
Tools: Key to Illustrations:
a) Hydr. pre-tensioning jacks for 1 Cylinder
Main bearing 94114 2 Piston
3 High pressure connection
b) Hydr. pre-tensioning jacks for 4 Vent screw
Tie rod GF 94180 5 Elastic bolt
Cylinder cover GF 94215 6 Nut
c) Hydr. pre-tensioning jacks for
Foundation bolt and engine stay 94145 BN Limiting groove
Exhaust valve cage 94252 CP Control pin
Connecting rod, bottom end bearing 94314 KO Slot
Connecting rod, top end bearing 94315 RS Round bar
Piston rod foot 94340 SA Gap
1. General
For screwed connections different designs and sizes of elastic bolts (bolts) are
used with threads extending over the nuts. There are three variants of hydraulic
pre-tensioning jacks (jacks), however with the same functionality:
a) See relevant descriptions in 1132−1
b) Jack with limiting groove (Fig. ’A’)
c) Jack with control pin (Fig. ’B’)
For each thread of the bolts suitable jacks are supplied. Since the bolts are pre-ten-
sioned with them, the nuts are threaded-on only manually until seated.
Prior to the mounting of the jacks, their threads as well as the threads of the bolts
must be carefully cleaned. Moreover the threads must be undamaged and freely
working. Concerning utilization of lubricant for screwing on the nuts the instruc-
tions in 0352−1 must be followed.
However, proper sequences or procedures specified for tensioning or loos-
ening are mentioned in the relevant group.
The arrangement and application of the jacks together with the necessary hydrau-
lic components are presented in 9403−2.
The high pressure (HP) hoses must be tightened firmly, so that the integrated non-
return valves are released.
Risk of accident! Always use gloves, a face shield and wear safety goggles when
working with hydraulic tools.
Check oil level in the HP oil pump or hydraulic unit. When oil must be added the
specification issued by the pump manufacturers must be followed. Utilize gener-
ally an engine lub. oil having viscosities SAE 30 to SAE 40. A cylinder lubricating oil
can also be used in exceptional cases.
For operation and maintenance of the HP oil pump or hydraulic unit we refer to the
manufacturer’s documentation.
The overview and remarks on storing, servicing and maintenance of the jacks as
well as dimensions of back-up and O-rings are presented in 9403−3.
For fitting or replacing of elastic bolts, see 0352−2 or 2751−1.
2013
Hydraulic Pre-tensioning Jacks
General Application Instructions
CHECK
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