Periodic Inspection - Yanmar 6LPA-STP2 Service Manual

Turbocharger
12/05

Periodic Inspection

Inspection Intervals
Periodically inspect the turbocharger for damage
and overall condition. The inspection interval may
vary due to operating conditions. Refer to the table
below as guideline when operating under normal
conditions.
Every 6
Inspection months
Item or 1,500
hours
Rotation of
O
turbine shaft
Play of turbine
shaft
Overhaul and
inspection
6LPA Service Manual
Inspection Interval
Every 12 Every 24
months months
or 3,000 or 6,000
hours hours
O
O
© 2007 Yanmar Marine International
Inspection Procedure
Running of Turbine Shaft
Inspect the turbine shaft operation by listening for
any abnormal sounds during operation. Use a
listening bar to help diagnose any potential
problems. Solidly position the end tip of the bar
against the turbocharger case and raise the engine
speed gradually. If high pitch sounds are generated
at intervals of 2 to 3 seconds, abnormal operation is
evident and a rotational problem may be present.
The bearing or rotor may be defective, and cause
for turbocharger replacement or overhaul.
Inspection of Turbine Shaft Play
Remove the turbocharger from the engine and
inspect the turbine shaft axial and radial play
following the procedures below.
After removing the turbocharger from the engine,
always cover the oil inlet and outlet ports with tape.
• Turbine Shaft Axial Play
• Service Standard: 0.06 to 0.09 mm (0.002 to
0.004 in.)
• Wear Limit: 0.11 mm (0.004 in.)
Note: Move the turbine shaft in an axial
direction (Figure 9-4, (5)).
Figure 9-4
(3)
(2)
Figure 9-4
1 – Oil Inlet
2 – Dial Indicator
3 – Magnet Base
4 – Turbine Wheel Chamber
TURBOCHARGER
(4)
(5)
(1)
0005237
9-11