WÄRTSILÄ RT-flex50-D, Maintenance Manual

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Maintenance
0330−1/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
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Group Key No.
Description Measuring
direction
(method of
measuring)
Nominal
dimension
(normal, new)
[mm]
Maximum clearance,
dimension
(due to wear)
[mm]
5556 Fuel pump
1 Clearance (plunger / cylinder) A−B radial 0.028−0.030 0.037
Clearance (plunger / cylinder) B−C radial 0.018−0.020 0.027
Guide piston outer
∅
130
Lower housing inner
∅
130
2 Clearance radial 0.070−0.125 0.149
3 Piston / lower spring carrier axial 0.02−0.06 0.08
5556 Roller guide
Bush outer
∅
60
Roller inner
∅
60
4 Clearance radial 0.06−0.09 0.10
Pin outer
∅
50
Bush inner
∅
50
5 Clearance radial 0.025−0.08 0.10
Pin outer
∅
50
Guide piston (bore) inner
∅
50
6 Clearance radial 0.009−0.050 0.080
7 Axial clearance of bush total 0.2−0.4 0.5
8 Total clearance between guide piston
and roller with pressure discs axial 0.26−0.54
0.7
2010
Clearance Table
Fuel Pump