WÄRTSILÄ PAAE051728, Instruction Manual

Page: 166 / 394

10.3 Main bearings
10.3.1 Dismantling of the main bearing
1 Remove the crankcase covers
on each side of the bear-
ing, on both sides of the engine.
2 Remove the main bearing
temperature sensor and the
clamps for the cable.
3 Mount the distance sleeve
800042 and the hydraulic
tool 800041 into position on the side screw (A), see Fig 10-1.
One or two nuts can be loosened simultaneously.
4 Open the nuts of the side screws
as described in adja-
cent figure.
5 Turn the crankshaft
to the BDC at the cylinder concerned.
6 Mount the distance sleeve
800095 into position on the
main bearing screw (B
1
) and insert the pin 800049, see Fig
10-1.
7 Mount the hydraulic tool
800046 on the same main bear-
ing screw, by using the tool 800051.
8 Apply the sleeve and hydraulic cylinder
onto main
bearing screw (B
2
) by the same procedure.
9 Open the nuts of the main bearing screws
as described
in adjacent figure. Both nuts should be loosened at the same
time.
10 Remove the hydraulic tools.
11 Remove the nuts of the main bearing screws.
12 Connect the hoses of the hydraulic pump
800059 and
to the side marked DOWN on the hydraulic jack, see Fig 10-2.
Connect the return hose to the side marked UP and an addi-
tional quick coupling male part to the free end of the return
hose and place it in the crankcase.
13 Unscrew the side screws
of the main bearing cap to be
lowered. Use the stud tool 800044.
14 Lower the main bearing cap
by pumping oil to the hy-
draulic jack with the hydraulic pump.
15 Remove the lower bearing shell.
16 Insert the turning tool
800004 into the main bearing jour-
nal radial oil hole.
17 Turn the crankshaft
carefully until the bearing shell has
turned 180° and can be removed. Remove the turning tool.
Hydraulic oil
DISMANTLING
1. Mount the cylinders.
2. Connect the hoses and open
the pressure release valve.
Tighten the cylinders to expel
oil out of these.
3. Turn the cylinders 180 counter-
clockwise.
4. Close the valve and pump pressure
according to stated value.
5. Open the nuts about half a turn.
6. Open the release valve and remove
the tool.
10 Engine Block with Bearings, Oil Sump and Cylinder Liner 32-200150
10 - 2 WÄRTSILÄ 32/34SG