MERLO PANORAMIC, User And Maintenance Manual

Page: 148 / 200

7 - PERIODIC SAFETY INSPECTIONS
7 - 10
b) chains outside the boom
To check the integrity and the wear level of chains "A", of pulleys "B" and their correct fitting on combs "C", the telescopic boom
of the machine must be placed parallel to the ground and the inspection carried out:
X – with the boom retracted
Y – with the boom extended
c) Completely retract the telescopic boom and check that the measurements indicated (A and B) are about 30 mm; If this is not
the case, the chains must be adjusted.
CHAIN ADJUSTMENT
Before adjusting the chains, the springs (D) have to be disassembled proceeding
as follows:
-
Take the threaded bar (E), the washer (F) and the nut (G) from the pocket
behind the seat. Fully screw the threaded bar (E) into the hole on the pin.
- Insert the washer (F) and screw the nut (G) onto the threaded bar up to about
L=10 mm as shown in the photo.
- Carefully unscrew the retainer nut (H) of the spring so that it is completely
released; then remove the threaded bar (E), the nut (H) and the spring (D).
- Repeat the same operation also for the other pin
Proceed to adjust the chains as follows:
-
The distance between the second and third boom (position A) is adjusted by using the adjusting screws "A", that between
the third and fourth boom (position B) is adjusted using the adjustments screws "B".
- To reduce the distance between the booms the corresponding lower adjustments screws need to be loosened, then the top
ones tightened to obtain a distance of 30 mm (adjust the position "A" using the adjustment screw on the cab side, then the
other adjustment screw needs to be tightened until the same length as the uncovered threading is obtained; In any event,
make sure that the position (M) is no more than 50 mm).
Tighten the corresponding lower cab side adjustment screw until the spring pack is at the position (N) indicated in the
photo; fully extend the booms, then bring them in by about 50 cm and tighten the remaining adjustment screws so as to
bring the other chains parallel to the first.
- To increase the distance between the boom the corresponding upper adjustment screws need to be loosened, then the
lower ones need to be tightened until the booms are brought to a distance of about 35 mm; retract the booms to the correct
distance by carrying out the operations reported in the previous point.