Wartsila RT-flex50-D - Page 55

Maintenance
0330−1/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
25/ 25
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
C
learance Table
F
uel Pump