JBM 53742 Guide D'utilisation page 7

REF. 53742
12. Ensure foot control lever is in the "Off" position be-
fore connecting to the air supply.
WARNING! Ensure the air supply is clean and does
not exceed the maximum pressure whilst operating the
compressor.
13. Drain the air tank daily. Water in the air line will
damage the ram.
14. Clean compressor air inlet filter weekly.
15. Line pressure should be increased to compensate
for unusually long air hoses (over 8 metres).
16. Keep hose away from heat, oil and sharp edges.
Check hose for wear, and make certain that all
connections are secure.
The recommended air hook-up procedure is shown
in fig.6:
OPERATION
COMPRESSING A STRUT SPRING
NOTE! Before removing the strut from the vehicle it is
recommended that the upper strut locking plate nut is
loosened a quarter turn. DO NOT loosen more than a
quarter turn.
1. With the strut and spring removed from the machi-
ne, select the most suitably sized bracket or the
strut clam according to the size of the spring and
fiti it onto the compressor using the locking pin to
hold it in position ( fig 7)
2. Position the lowest coil of the spring in the lower
bracket and rotate the strut and spring, so that the
coils held as low as possible ( fig 8)
3. Swing the small uppers arms into position and lo-
cate the upper brackets on the uppermost availa-
ble coil (fig 9). Ensure that the coil is placed inside
the recesses of the brackets to ensure that the coil
will not break free under compression.
4. Having correctly positioned the spring on the lower
and upper brackets, tighten all the locking knobs
(fig 10)
5. Relocate the locating platform if required, so that
it is just underneath the bottom of the strut and
secure it in place.
6. Use the chain to secure the spring by pulling it
across the spring and hooking it onto the clip. Shut
the safety guard ensuring that it locks in place.
7. Check to make sure that the spring is safely se-
cured and then start to compress the spring coils.
Gradually press the correct pedal on the foot con-
trol to start the compression, stopping to check the
spring is still securely held.
DANGER! Stop compressing the spring before the coil
windings touch.
WARNING! If the spring/strut is not located correctly in
the jaws, it is possible that the strut/top retaining cap
could be subject to sideways forces. Watch closely as
the spring reaches its final phase of compression and
ensure the top cap assembly rotates freely before at-
tempting to remove it.
8. When the strut is loose within the spring, unscrew
the strut locking plate nut and remove the locking
plate from the top of the strut, gradually discharge
the pressure on the spring by operating the foot
control pedal. When all the pressure has been re-
leased, taking care to support the strut and spring
assembly when it becomes loose, move the loca-
ting platform and withdraw the strut and release
the spring from the retaining brackets if required.
FITTING A STRUT SPRING
1. Offer the new strut spring up to the compressor's
brackets and fit in the same position as that of the
old spring. Position the lowest coil of the spring
in the lower bracket and rotate the spring, so that
the coil is held as low as possible. Swing the small
upper arms into the position and locate the upper
brackets on the uppermost available coil. Ensure
that the coil is placed inside the recesses of the
brackets to ensure that the coil will not break free
under compression. Tighten all the locking knobs
( fig.10)
Note: There must be coils free at either end to allow
them to seat on the strut plates, without the strut and
compressor brackets interfering.
2. Insert the strut up inside the spring, and move the
locating platforms just underneath the bottom of
the strut to support it and secure it in place by tur-
ning the knob.
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