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

LUBRICATION

INTRODUCTION

This section of the Service Manual describes the procedures necessary to service the 4BY and 6BY
lubrication systems.

SPECIFICATIONS

Test and Adjustment Specifications

Note: All pressure specifications are with engine at normal operating temperature.
Inspection Item
Oil Pressure

Special Torque Chart

Component
Oil Filter Cap
Oil Sump Bolt
Oil Sump Drain Plug
Oil Pickup Bolts
8-6
Model
4BY
6BY
Tightening Torque
25 N·m (225 in.-lb)
20 N·m (177 in.-lb)
25 N·m (221 in.-lb)
10 N·m (89 in.-lb)
Test RPM
Idle
4000 rpm 3.8 - 6.0 bar (58 - 87 psi)
Idle
4000 rpm 3.8 - 6.0 bar (55 - 87 psi)
Lubricating Oil
Application
See Replace Engine Oil
Not Applied
Not Applied
See Remove and Install
Oil Sump on page 8-16
Not Applied
Not Applied
BY Service Manual
Introduction
Specification
0.8 bar (12 psi)
0.7 bar (10psi)
Reference Page
and Engine Oil Filter
Element on page 8-12
See Installation of Oil
Pump on page 8-17