Maintenance
9403
−
3/A1
Winterthur Gas & Diesel Ltd.
Hydraulic Pre-tensioning Jacks
Storage, Servicing and Maintenance
1.
General
The hydraulic pre-tensioning jacks must be kept in their tool boxes when not in use. After
you use the pre-tensioning jacks, close the connections with plugs and apply grease.
We recommend that, for each jack, you keep a sealing kit (KJ
−
) in stock.
Always make sure that new back-up rings and O-rings are installed in their correct
positions, as shown in the data that follows.
Note: Carefully install new back-up rings and O-rings to prevent damage. Do not
use tools with sharp edges.
Put uncut back-up rings in hot water before you install them.
1.1
Dimensions of back-up Rings and O-rings
Tool
No.
Position of application of
pre-tensioning jack
Part
Back-up ring
(uncut)
O-ring
Dimension
[mm]
o
x i
x t
i
x s
94110
Thrust device for main bearing cover
piston
cylinder
48 x 41.8 x 1.4
34.5 x 30 x 1.4
40.87 x 3.53
29.82 x 2.62
94114
Elastic bolts to main bearing
piston
D. cylinder
67.2 x 61 x 1.4
54.6 x 48.4 x 1.4
59.92 x 3.53
47.22 x 3.53
lower Cyl.
7.52 x 3.53
94145
Foundation bolts and engine stays
piston
cylinder
75 x 68.8 x 1.4
60.2 x 54 x 1.4
66.27 x 3.53
53.57 x 3.53
94180
Tie rods
piston
D. cylinder
79 x 72.8 x 1.4
64.2 x 58 x 1.4
72.62 x 3.53
56.74 x 3.53
lower Cyl.
7.52 x 3.53
94215
Elastic bolts to cylinder cover
piston
cylinder
91 x 81.6 x 1.7
67.2 x 61 x 1.4
74.78 x 5.53
59.92 x 3.53
94252
Elastic bolts to exhaust valve cage
piston
cylinder
81.9 x 75.8 x 1.4
60.2 x 54 x 1.4
75.79 x 3.53
53.57 x 3.53
94314
Elastic bolts to bottom end bearing
piston
cylinder
110 x 100.6 x 1.7
79.2 x 73 x 1.4
97.79 x 5.33
72.62 x 3.53
94315
Elastic bolts to top end bearing
piston
cylinder
76 x 69.8 x 1.7
60.2 x 54 x 1.4
69.44 x 3.53
53.57 x 3.53
O-ring
t
i
o
i
o
002.696/98
Back-up ring
s
011.032/03
Fig. 1
2016
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