Safety Precautions; Introduction; Specifications; Test And Adjustment Specifications - Yanmar BY Series Service Manual

Safety Precautions

12/05

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

Test Item
Turbocharger Boost
Pressure

Special Torque Chart

Component
Turbocharger to Exhaust
Manifold
Turbocharger Oil Supply
Line
Turbocharger Oil Return
to Crankcase
BY Service Manual
Engine
Minimum - 1600 mbar
4BY2-150
(23.2 psi)
Minimum - 1650 mbar
4BY2-180
(23.9 psi)
Minimum - 1950 mbar
6BY2-220
(28.3 psi)
Minimum - 2000 mbar
6BY2-260
(29.0 psi)
Size
4BY2
6BY2
4BY2 M10
6BY2
4BY2
6BY2
© 2009 Yanmar Marine International
Limit
Maximum - 1750 mbar
(25.4 psi)
Maximum - 1800 mbar
(26.1 psi)
Maximum - 2150 mbar
(31.2 psi)
Maximum - 2200 mbar
(31.9 psi)
Comments
- Apply copper anti-seize
to threads
Replace banjo bolt
and sealing rings
- Hose clamp
TURBOCHARGER
Reference Page
Measure Charge
Pressure on page 9-5
Specification
23 N·m (204 in.-lb)
22 N·m (195 in.-lb)
3 N·m (27 in.-lb)
9-3