Introduction; Specifications; Test And Adjustment Specifications; Special Torque Chart - Yanmar BY Series Service Manual

Introduction

INTRODUCTION
This section of the Service Manual describes the removal, inspection, and installation of turbochargers
used on 4BY and 6BY engines.

SPECIFICATIONS

Test and Adjustment Specifications

Inspection 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
4BY150
(23.2 psi)
Minimum - 1650 mbar
4BY180
(23.9 psi)
Minimum - 1900 mbar
6BY220
(27.6 psi)
Minimum - 2000 mbar
6BY260
(29.0 psi)
Size
4BY
6BY
4BY
M10
6BY
4BY
6BY
Limit
Maximum - 1750 mbar
(25.4 psi)
Maximum - 1800 mbar
(26.1 psi)
Maximum - 2020 mbar
(29.3 psi)
Maximum - 2120 mbar
(30.7 psi)
Comments
Apply copper anti-seize
-
to threads
Replace banjo bolt
and sealing rings
- Hose clamp
TURBOCHARGER
Reference Page
See Measuring Charge
Pressure on page 9-7
Specification
23 N·m (204 in.-lb)
22 N·m (195 in.-lb)
3 N·m (27 in.-lb)
9-5