Yanmar 6BY2 - Safety Precautions; Introduction; Specifications; Test and Adjustment Specifications

TURBOCHARGER
Safety Precautions
12/05
BY Service Manual
9-3
© 2009 Yanmar Marine International
SAFETY PRECAUTIONS
Before servicing the turbocharger, review the Safety Section on page 2-1.
INTRODUCTION
This section of the Service Manual describes the removal, inspection and installation of turbochargers used
on 4BY2 and 6BY2 engines.
SPECIFICATIONS
Test and Adjustment Specifications
Special Torque Chart
Test Item Engine Limit Reference Page
Turbocharger Boost
Pressure
4BY2-150
Minimum - 1600 mbar
(23.2 psi)
Maximum - 1750 mbar
(25.4 psi)
Measure Charge
Pressure on page 9-5
4BY2-180
Minimum - 1650 mbar
(23.9 psi)
Maximum - 1800 mbar
(26.1 psi)
6BY2-220
Minimum - 1950 mbar
(28.3 psi)
Maximum - 2150 mbar
(31.2 psi)
6BY2-260
Minimum - 2000 mbar
(29.0 psi)
Maximum - 2200 mbar
(31.9 psi)
Component Size Comments Specification
Turbocharger to Exhaust
Manifold
4BY2
6BY2
- Apply copper anti-seize
to threads
23 N·m (204 in.-lb)
Turbocharger Oil Supply
Line
4BY2
6BY2
M10 Replace banjo bolt
and sealing rings
22 N·m (195 in.-lb)
Turbocharger Oil Return
to Crankcase
4BY2
6BY2
- Hose clamp 3 N·m (27 in.-lb)