INSTALLATION
14
December 2016 / W-SQ20 / EN
A negative feature of a dry exhaust system is the heat
radiated by its components. Measures are taken to
overcome the heat problem: The exhaust bend to bring the
exhaust out of the canopy is cooled by water. Insulation
blankets are included in the exhaust kit to insulate the
flexible bellow and the first muffler.
When a dry exhaust has its outlet on the roof, all the pipes
inside the vehicle has to be insulated.
The exhaust pipes will be very hot and all
accessible pipes and mufflers are dangerous
to people when not insulated.
There are companies that are specialised in insulating hot
pipes and fancy systems are available to make it good
looking. However, it is also possible to do it yourself by
winding fibreglass or Rockwool around the pipes and seal
it with aluminium tape.
2
THE STANDARD DRY EXHAUST SYSTEM
The standard exhaust system contains:
On the generator set:
An insulated exhaust bend
In the exhaust installation kit:
A stainless steel shielded flexible bellow
One resonance muffler
One absorption muffler
Clamps and rubbers to mount the system flexible
Fittings, bends and pipes to make the different
connections
Blankets for thermal and sound insulation.
The mufflers are high quality industrial mufflers that are
much more effective, robust and durable than mufflers
made for automotive use.
3
INSTALLATION OF THE EXHAUST
Before determining the location of the generator set one
has to consider how to get away with the exhaust. Often
one can find space below the vehicle between the chassis
to mount the mufflers. The outlet should blow the fumes
away from the doors to avoid a nasty smell. When the
gasses are in the flow of air blowing from the radiator this
will help to avoid the fumes to be noticed. Under no
condition the fumes should be sucked into the flow of air
into the radiator. In wind still conditions a light smell of
exhaust fumes around the vehicle will not be avoidable.
To bring the exhaust to the top of the vehicle gives the
best results on noise and smell. However, when the pipes
go through the vehicle they should be insulated and
around the hole in the roof should be a collar to prevent
rainwater to leak in. Both mufflers could be on the roof or
one of them or both could be below the vehicle.
In general, it is better to have the mufflers wide apart: the
resonance muffler close to the generator and the
absorption muffler on the end of the line. A short pipe
(30cm) should be on the far end after the absorption
muffler. The absorption muffler has no flow direction and
could be mounted both ways. The resonance muffler
should be mounted taking into account the indication on
the muffler itself.
The resonance muffler should be fitted taking
into account the gas flow direction indicated.
In the kit are clamps to mount the exhaust pipes to
stainless steel bars. These bars should be mounted to the
chassis of the vehicle. It is recommended to use rubber
mountings whenever possible. However, take care that the
heat conducted through the brackets will not affect the
rubber. Refer to figure 22 how to mount the rubber in a
safe way. When any doubt an extra safe guard could be
constructed from steel wire or chain.
Figure 22: Mounting bracket in rubber with safeguard
