HHSB can be applied from a single sleeper side or
end - enabling adequate track packing to be
achieved, despite sleepers, being obstructed by
signalling equipment, interlacing with other
HHSB does not damage ballast to the same extent
as conventional compaction methods (e.g.
HHSB equipment is lightweight and portable, with
many other applications possible for its
HHSB is particularly suited to S & C layouts
- especially those complicated layouts unsuitable
for conventional maintenance by tampers.
HHSB was still fairly labour intensive
and comparatively slow and therefore the process
languished. However, after many months of testing
and development, Factair Ltd, in conjunction with
Amec Rail has modified both the equipment and its
application methods to a stage, whereby, it is a
commercially attractive and practical system. A
lightweight compressor is utilised and results in
a system that is truly portable and a great
advance over previous HHSB methods. Factair's HHSB is
particularly applicable to S & C maintenance,
especially around switch toes and crossing areas,
i.e. the very areas that S & C tampers cannot
using several sets of equipment, it is also
feasible to treat complicated/interlaced S &
C layouts that, again, are unsuited to
maintenance by S & C tamper.
adjustable handle is designed to allow the
operative to stand normally without stooping,
which reduces fatigue and enhances output. A
guarded hand-operated valve controls the supply
of air to the delivery hopper. Ballast is
hand-fed into the hopper and immediately
delivered to the void beneath the sleeper.
Compressed air at 7 bar is supplied via a heavy-
duty air hose with safety connections to
compressor and lance. The compressor is powered
by a reliable and fuel-efficient, single
cylinder, Honda engines with integral fuel tank
and hose basket. A remote engine stop with auto
retracting cable is supplied for the lookout. The
sound level is less than 80dBa. The total weight
of the compressor in working order is 120kg, this
lightweight, combined with a well-balanced frame,
makes the unit easily manoeuvrable by one man.
The large cross section tyre distributes the
weight of the machine and allows it to be pushed
along the ballast surface with ease.
The compressor can be fitted with optional
airline lubricator to allow other pneumatic tools
to be used from this power source. Diesel powered
units are also available.