Winterthur Gas X35-B, Maintenance Manual, Page: 88 / 547

Maintenance
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Winterthur Gas & Diesel Ltd.
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2. Pre-tension Check
1) Clean the threads of the foundation bolts (6, Fig. 3 ) and the seating surfaces.
2) Apply MOLYKOTE G paste to the threads of the foundation bolts.
3) Put the pre-tensioning jack (94145) on the applicable foundation bolt (6).
4) Open the vent screw (8).
5) Turn the pre
− tensioning jack (94145) fully down until there is a small clearance, or
no clearance at X.
6) Connect pre-tensioning jack to the HP oil pump (94931) as shown.
7) Close the relief valve (9).
8) Operate the HP oil pump (94931) until oil that has no air flows from the vent screw
(8).
9) Close the vent screw (8).
10) Operate the HP oil pump (94931) to apply a pressure of 1500 bar to the foundation
bolt (6). Keep the pressure constant.
Note: Do not move the piston (1) of the pre-tensioning jack (94145) above the red
groove (2).
11) Use a feeler gauge to do a check for clearance through the slot (4) between the nut
(7) and the sleeve (5).
12) If there is a clearance, do step a ) to step c ). If there is no clearance, continue from
step 13 ).
a) Make sure that the pressure on the foundation bolt is 1500 bar.
b) Use the round bar (94005
− 6) to tighten the round nut (7).
c) Do step 11 ) again.
13) Open the relief valve (9) to release the pressure to zero.
14) Remove the pre-tensioning jack (94145).
Note: If all foundation bolts are loose and must be tightened again, do the
procedure given in paragraph 4 .
2017
Bedplate and Thrust Bearing