Yanmar 4BY - Introduction; Specifications; Test and Adjustment Specifications; Special Torque Chart

TURBOCHARGER
BY Service Manual
9-5
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
Special Torque Chart
Inspection Item Engine Limit Reference Page
Turbocharger Boost
Pressure
4BY150
Minimum - 1600 mbar
(23.2 psi)
Maximum - 1750 mbar
(25.4 psi)
See Measuring Charge
Pressure on page 9-7
4BY180
Minimum - 1650 mbar
(23.9 psi)
Maximum - 1800 mbar
(26.1 psi)
6BY220
Minimum - 1900 mbar
(27.6 psi)
Maximum - 2020 mbar
(29.3 psi)
6BY260
Minimum - 2000 mbar
(29.0 psi)
Maximum - 2120 mbar
(30.7 psi)
Component Size Comments Specification
Turbocharger to Exhaust
Manifold
4BY
6BY
-
Apply copper anti-seize
to threads
23 N·m (204 in.-lb)
Turbocharger Oil Supply
Line
4BY
6BY
M10
Replace banjo bolt
and sealing rings
22 N·m (195 in.-lb)
Turbocharger Oil Return
to Crankcase
4BY
6BY
- Hose clamp 3 N·m (27 in.-lb)