Yanmar 3TNV Series Service Manual page 147

8. Turbochager
(6) Thrust bushing, oil thrower 2 and thrust
bearing 6 Inspect each part for wear,
surface defect and discoloration.
Replace with a new one if defective even within the
wear limit.
(a) Thrust bushing
Measure the distance between grooves (K) of the
thrust bushing, and replace with a new one if the wear
limit is exceeded.
Wear limit
RHF5 4.07mm
RHB51 4.07mm
RHB31 3.65mm
(b) Oil thrower 2
Measure the seal ring groove widths (G1) and (G2), and replace with a new one if the wear limit is
exceeded.
Wear limits
RHF5--- G1: 1.31mm, G2: 1.11mm
RHB51--- G1: 1.31mm, G2: 1.11mm
RHB31--- G1: 1.04mm, G2: 0.84mm
(c) Thrust bearing 6
Measure the thrust bearing width (J), and replace with
a new one if the wear limit is exceeded.
Wear limit
RHF5 3.98mm
RHB51 3.98mm
RHB31 3.58mm
(7) Floating bearing 5
1) Inspect the floating bearing for abnormal wear,
discoloration or surface defect.
Replace with a new one if defective.
2) Measure the inside diameter (C) and outside diameter(D).
Replace the bearing if either wear limit is exceeded.
Wear limits
RHF5 Outside diameter (D): 12.31mm,
Inside diameter (C): 8.04mm
RHB51 Outside diameter (D): 12.31mm,
Inside diameter (C): 8.04mm
RHB31 Outside diameter (D): 9.93mm,
Inside diameter (C): 6.29mm
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