FIGURE 13.
Attaching the HESI to the retractor.
The mounting rings come as a pair.
One ring (A), will fit on the retractor
tube, the other (B), will fit on the
HESI rod (P/N “RET CLMP”). The
ring for the retractor rod is fitted first,
allowing a small overhang beyond the
end of the retractor rod of no more
than 1mm. the 2 grub screws are then
tightened to secure the ring to the
tube. The second ring B is slid over
the HESI rod, followed by the
supplied O seal. The rod is now
inserted into the retractor tube, and
positioned as required. The O seal is now pushed back down the rod until it mates with the end of the
retractor tube. Ring B is now pushed back and the holes aligned for the screws 1 and 2, which are
inserted and tightened. The 2 grub screws are now tightened on to the HESI rod, securing the rod to the
tube, with the O seal creating a seal at the end.
It should be noted that the grub screws should be tightened sufficiently to securely hold both parts,
but not enough to deform the retractor tube or the HESI rod.
Retractor Setting Up Procedure.
CAUTION:
It should be noted that an air supply of 6 barg, unrestricted in its flow, will make the piston move
at approximately 3M per second, and stop instantly on reaching the other end of the cylinder.
At this inlet air pressure, the theoretical max force generated is 1870N (190Kgf).
Due to the nature of this equipment, and the warning above, it is essential that all setting up proce-
dures are carried out exactly as detailed in the following procedure.
Ensure the cylinder is securely held in a safe position, and that both ends of the piston rod have
sufficient room to move in and out of the cylinder, unimpeded, when operated. The operator, and
anyone else present at the testing or setting up, is kept safely out of the way of the rod assembly,
preferably behind barriers if possible. All adjustments can be carried out safely without the operator
being in front or behind the traveling piston.
If the cylinder and solenoid valve combination is
ordered as kits it is essential that great care is taken
when setting up the rate of travel for the cylinder. The
cylinder has the ability to cushion the end travel to pre-
vent extreme de-acceleration causing damage to any
attached equipment. Out of the box, this is not guaran-
teed to have been set, so it should be assumed that
there is no cushioning. To this end, the small screw
marked C, should be adjusted fully clock wise and
then turned back 2 complete turns, to give an
acceptable effect. In the kit, there are 2 exhaust flow
control units that should be mounted directly on to the
outlet ports of the solenoid valve, as above. These
valves should also be adjusted fully clockwise by means of a hexagon key, and then returned 2 full turns, in order to
restrict the amount of air passing into/out of the cylinder.
Having connected all the equipment together correctly, the air supply is adjusted to approximately 2
Bar, and connected to the valve inlet port. Power is applied to the solenoid valve, and the flow control
valve adjusted to give an acceptable insertion speed. The return flow control valve is also adjusted to
2 2
