TROUBLE SHOOTING
34
July 2009 / WHISPER 6/8/11 / US / Copyright © 2009 Mastervolt
5.4.3
Measuring exhaust backpressure
The exhaust system must be of adequate size -1 5/8”/ 40
mm - and maximal length (refer to installation manual).
When any doubt; backpressure has to be measured. An
easy way to measure for back-pressure is to use a water
column.
A water column can be made visible in a plastic tube along
a yardstick and fitting the end to a hose connection to fit in
the adaptor on the injection bent after removing the
exhaust temperature switch.
Figure:20: Measuring exhaust backpressure
The bent A hanging down should not be to short helping to
damp the pulsating effect of the gas discharge that is
characteristic for a one cylinder engine. The water column
should be no more than 27 inches (69 cm.) of water (1 PSI
- 0,07 bar)
5.4.4
Disassembling instructions
It could be necessary to disassemble the generating set
for repair or checks.
Following instructions will help:
1 To take the generating set out of the canopy all hose
and cable connections have to be taken off. The set is
fixed to its base by four rubber mountings and can be
loosened by removing the four nuts from the bolts of
these mountings. Moreover the generating set is fixed
by 2 fail safes which prevent the generating set from
getting loose if the rubber mountings should break
down. The nuts of the fail safes are diagonal to each
other. When the 6 nuts in total are removed the
generating set can be lifted out the canopy. 5 nuts are
well accessible. The sixth nut has to be removed by
taking out the bold from the bottom of the canopy.
2
The easiest way to get the generator out of its capsule
is by lifting the set using the lifting eye and removing
the capsule downwards.
3 The cooler elements are welded to the alternator
housing with silver and cannot be disassembled.
How-ever one can take off the complete alternator
housing.
4 Before the alternator can be taken off one has to take
out the fitting to the oil cooler to be able to take off the
aluminium housing. All cables and wiring have to be
loosened first.
5 The rotor can be taken off by removing the bolt which
goes through the shaft (normal clockwise threaded).
The end of the shaft is specially threaded to push off
the rotor from the conic stub shaft, which is on the
flywheel, using a 0.25 inch (6-mm) rod of 6.5 inches
(165-mm) (Whisper 6 and 8) / 7.3 inch (185mm)
(Whisper 11) length and a M10 bolt.
6 Reassembling the generating set one should take
care of alignment, cleaning the surfaces between
engine and alternator and tighten the bolts crosswise
and gradually.
7 Use Loctite 577 to seal the fittings, which should first
be cleaned and made free of oil and grease.
8 Test the generating set first outside its capsule and
check very carefully for leakages before putting it
back in its enclosure.
MAXIMUM
69cm
27INCHES
