Main Bearings
Inspection / Disassembly
A5.05. 02.05.01.00
15000, 30000
M20
en / 30.05.2000 IB021376 3/5
02
Ĺ
1.3 Loosen bearing bolts with hydraulic tightening equipment.
1.3.1 Remove hexagon screws (Fig. 2/11) of the main bearing which is to be removed.
1.3.2 Place bearing ring (W1) over the round nut (12) and turn hydraulic tensioning element
(W2) on bearing bolt (13) and screw against bearing ring. Make sure that the slots (14) are
easily accessible.
1.3.3 Link hydraulic tensioning element (W2) with high-pressure pump (W3) via high-pressure
hose (W4) and press onto block length (Valve [Z] open at the high-pressure pump).
1.3.4 Set a gap “s” of 2.5 mm (Fig. 3)
between bearing ring and tensioning
element.
1.3.5 Stretch both bearing bolts in one work
sequence with
p = 750 bar
and loosen round nuts (12) with pin
(W5).
Note:
Prestress bearing bolts by approx.
50 bar more if required. If the pressure
is increased further the round nut might
stick due to stretching of the bolt
thread.
W4
ZW3
11
14
W1
12
W2
13
Fig. 2
s
W5
12
Fig. 3
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