WinGD RT-flex50DF, Maintenance Manual, Page: 537 / 586

Maintenance
9403 − 4/A1
Winterthur Gas & Diesel Ltd.
1/ 4
Hydraulic Pre-tensioning Jacks
General Instructions
Hydraulic Pre-tensioning Jacks for:
Version 1:
Version 2:
Foundation bolt and engine stay 94145 Main bearing 94114B
Elastic studs − cylinder cover 94215A Tie rod 94180A
Elastic studs − exhaust valve 94252
Connecting rod − top end bearing 94315
Piston rod − screw connection 94340
Elastic studs − piston head 94346
Elastic stud − bottom end bearing 94314
1. General
There are two versions of hydraulic jack preparation:
D Version 1 − the piston (2 is attached directly on to the elastic bolt / elastic stud (6)
(see Fig. 1 ).
D Version 2 − the nut (10) is used to apply tension to the elastic bolt / elastic stud
(see Fig. 2 ).
1) You must make sure that the threads of elastic bolts and hydraulic jacks are
smooth and clean.
2) You must make sure that you add lubricant to the elastic bolts and hydraulic
jacks, refer to 0352-1 .
3) Connect the hydraulic components to the hydraulic jacks, refer to 9403 − 2 .
4) Fully tighten the high pressure (HP) hoses to make sure that the built − in
non-return valves can operate.
WARNING
Injury Hazard: Always put on gloves, a face shield and safety
goggles when you use hydraulic tools. Hydraulic tools can cause
injury.
5) Do a check of the oil in the HP oil pump or hydraulic unit.
Note: When you must add oil, read the specification of the pump manufacturer.
Use an engine lubricating oil that has a viscosity of SAE 30 to SAE 40. In
unusual conditions, you can also use cylinder lubricating oil.
D For data about the sealing rings on the hydraulic jacks, refer to 9403 − 3 .
D
To install elastic studs, refer to 0352 − 2 .
2016