JOSAM
The picture shows JOSAM aluminium trolleys starightening
a local damage on an aluminium trailer.
We can divide
straightening into two parts: frame straightening and cab straightening
Frame straightening, or chassi straightening, is performed with
JOSAM aluminium alloy tools which decreases the weight of about
70% from normal steel tools.
By using the aluminium press trolleys, as well as other straightening
tools,
JOSAM
can provide a user friendly and ergonomic working environment. As
a natural result a higher efficency is obtained and the operator’s
skill lasts longer thanks to minimizing the risk of ergonomic injuries
to the human body.
The JOSAM tools are anchored into the workshop floor by means of
casted floor beams (You may e-mail info@josam.se
for detailed drawing of our floor beam structure).
Below you will find four typical damages of frames which can easily
be repaired with JOSAM frame press:
Side
sway
Quite often the cross members are not at right angles to the side
rails. The front cross member is often heavily deformed because
of the large angular alteration which has taken place in relation
to the side rails.
Vertical
bends
Vertical bends can appear in many different ways. The cause is often
due to incorrect usage of tipping or loading equipment. The above
diagram shows the effect caused by overloading.
Twist
A frame is twisted if the side members are straight but distorted
in relation to each other. The cross members are normally at right
angles to the side rails. Damage occurs very often on two axle vehicles.
Diagonal
displacement
The frame members are displaced longitudinally and the cross members
are out of square in relation to the side members. Diagonal displacement
often occurs on tipper trucks which have overturned.
Cab straightening
Cab damages are possible to straighten without dismounting the
cab. However, if the damage is too severe it must be dismounted
from the truck and fixed into the JOSAM cab bench. This consists
of a rigid base which is anchored to beams embedded in the workshop
floor. The four mounting points of the cab are anchored to the
bench by means of our adapter sets. These sets are available for
the majority of cab makes and models. Even a severely damaged
cab can easily be mounted thanks to the moveable jig fixtures.
The base of the cab can then be pushed and pulled hydraulically
into its correct position.
The JOSAM cab bench with movable jig fixtures.
By
pulling with cylinders mounted on the high reach towers the upper
part of the cab is straightened into its normal position. The high
reach towers also have the advantage of pressing, or acting as counterstay
while pulling. When the job is completed the four locating pins
should run easily in their holes without any friction.
Finally, we are able to measure the cab with a laser tool named
cabaligner, to check that the measurement from side to side are
OK.
Pulling out a bus with our cab tower and 10 ton aluminium
hook.
The
high reach pulling towers can also be used without the cab bench
fixture e.g. when straightening tractors, coaches or double deckers
these towers are very efficient.
