WÄRTSILÄ PAAE051728, Instruction Manual

Page: 184 / 394

Caution! The screws will be overloaded if the maximum hydraulic
pressure is exceeded.
It is recommended to change the screws if maximum hydrau-
lic pressure is exceeded for some reason.
10 Release the pressure slowly and disconnect the hoses, un-
screw the tightening nuts and remove hydraulic tool as one package.
11 Remove the nuts.
12 Rotate the crank pin of the cylinder concerned in the
TDC.
13 Separate the upper part (1) from the big end (5) by lift-
ing the piston.
Support the upper part of the connecting rod to avoid dam-
aging the cylinder liner.
Note! To avoid damaging the guiding pins the separation of the
upper part (1) and the big end (5) should be done aligned.
14 Remove the shim (2), see Fig 11-2.
Note! Do not mix the shims (2) with other connecting rod shims.
15 Mount the guiding plug 800017 in the screw hole on the
upper part of the connecting rod, see Fig 11-5.
16 Lift out the piston and the upper part of connecting rod.
17 Repeat the steps above in the other connecting rod on
the same crank pin on an V-engine.
11.3.3 Changing of big end bearings
1 Remove both crankcase covers adjacent to the con-
necting rod concerned on both side of engine.
2 Turn the crankshaft to the BDC the cylinder concerned.
3 Open the upper connection by lifting the distance
sleeves and the hydraulic tools in to position, see Fig 11-3.
4 Connect the hoses of the hydraulic pump 800053 and pro-
ceed to open the upper connection as described in adjacent figure.
5 Strain the screws by raising the pressure to the value
stated in the section 07.3 and proceed with opening the nuts.
Hydraulic oil
DISMANTLING
1. Lift the distance sleeve.
2. Lift the hydraulic cylinder and
screws in a one package in pos.
3. Connect hoses, open valve.
4. Tighten the tool assembly,
until the piston and cylinder is
on the same level, open the
nuts by 180˚.
5. Close the valve, pump to
required pressure.
Open the nuts about half a turn.
6. Open the valve slowly and
remove the tool.
11 Crank Mechanism: Crankshaft, Connecting Rod, Piston 32-200020
11 - 6 WÄRTSILÄ 32