jcb EcoMAX - Exhaust System; Overview

JCB EcoMAX Engine Installation Manual
Page 16 of 64 320/A9164-1 © JCB Power Systems Ltd.
6. Exhaust System
6.1 Overview
W WARNING!
Be aware of the hot exhaust system even with the engine stopped.
W WARNING!
Breathing the engine exhaust gases can harm and possibly kill you. Do not operate the engine in
closed spaces without making sure there is good ventilation. If possible, fit an exhaust extension.
If you begin to feel drowsy, stop the engine at once and get into fresh air.
N NOTE: Tier 4 / Stage IV engines must also refer to JCB EcoMAX Emissions Related
Installation Instructions. For more advice, contact JCB Power Systems Applications
department.
The engine installer must fit an exhaust system. The purpose of the exhaust system is to
pipe hot, noxious gases to a safe outlet position and to quieten the noise carried by the
exhaust gas. The engine installer must take care with the selection of the materials used and
the mounting of the exhaust system to make sure it is durable and effective.
The design of the exhaust system can have a negative effect on engine performance if it is
too restrictive or the outlet position allows exhaust gas to be drawn into the air intake.
Design considerations also need to include corrosion resistance, pipe sizes and bends,
flexible elements and thermal expansion.
Packaging of the exhaust pipework and silencer also needs careful consideration due to their
high temperature and high levels of vibration.
Off-highway equipment employs several different exhaust mounting strategies including
engine mounted silencers, equipment mounted silencers and cab mounted silencers. Each
approach requires special consideration in relation to accommodation of relative movement
between sections of the exhaust system, methods of mounting and noise emission.
The OEM must make sure that vibrations transmitted personnel are minimised as vibration is
uncomfortable and can be damaging to health.
Where there is risk of access to the hot components on the engine, the OEM must make
sure that appropriate warnings are made on the equipment and in the equipment operating
manual.
The position of the outlet also needs consideration to make sure that the exhaust gases are
directed away from personnel.
C NOTICE! Water ingress at the exhaust pipe may cause engine damage.
The exhaust system must be designed to prevent water ingress. Heat from exhausts and
turbo chargers can be a source of ignition or can damage adjacent components.
Consider the position of the exhaust system in relation to fuel system components, cables,
plastics, hoses, wiring, soundproofing and to oil and fuel fillers.
You must make allowances for combustible airborne material such as chaff, sawdust, paper.
You must use insulating jackets or heat shields to protect against fires or heat damage.