Service Manual 04/2010 Rev.B
66
correspondent switch holder and reverse the
wires. Check the machine again.
5.15 SWITCHES S1: CHECK AND
REPLACEMENT
: 30’ each one
: Medium screwdriver, tube type wrench
10mm, end wrench 14mm
L : Defective switch/es S1 and S2 may cause
the following malfunction:
1. The chuck does not turn in one or both ways.
2. Fuse F7 blows up.
TO CONTROL THE SWITCHES:
If the wires are fine ( 5.14) the switches S1
need to be checked.
Take the multimeter and select it in Ohm.
Position the multimeter probes on the
contacts where the wires were fitted.
Press by hand the switch and verify if there is
continuity: If not the switch must be replaced.
TO REPLACE THE SWITCHES:
To replace the defective switch loose its
screws and fix the new one following the
instruction ( 5.14).
5.16 MICRO SWITCHES S2, S3, AND
S6: CHECK AND REPLACEMENT
: 30’ each one
: Small and medium cross screwdriver.
L : Defective switches S2, S3 and S6 may
cause the following malfunction:
1. One or more hydraulic movements do not
work.
2. Fuse F6 blows up.
3. Switching the machine on one or more
movements starts automatically.
IMPORTANT!
FAILURE #1 MAY ALSO BE CAUSED BY
HYDRAULIC PROBLEM. TO VERIFY IF THE
FAIULURE IS ELCTRIC OR HYDRAULIC
PRESS THE COIL VALVE CORRESPONDENTS
TO THE DEFECTIVE HYDRAULIC MOVEMENT
(Fig. 93).
IF THE MACHINE WORKS NORMALLY BY
PRESSING THE COIL VALVE, THE PROBLEM
IS DUE TO AN ELECTRIC MALFUNCTION.
TO CONTROL THE SWITCHES:
If the wires are fine (
5.14) the switches S2,
S3 and S6 need to be checked.
Take the multimeter and select it in Ohm.
Position the multimeter probes on the
contacts where the wires were fitted.
Press by hand the switch and verify if there is
continuity: If not the switch must be replaced.
TO REPLACE THE SWITCH:
To replace the defective switch loose its
screws and fix the new one following the
instruction ( 5.14).
5.17 MICRO SWITCHES S2, S3, AND
S6 HOLDERS: CHECK AND
REPLACEMENT
: 1h
: Small and medium cross screwdriver, big
standard screwdriver, pliers, loctite.
L : Defective switches holders may cause the
following malfunction:
1. One or more hydraulic movements do not
work.
2. The holders are damaged or broken.
TO CHECK THE HOLDERS:
Disconnect power supply from machine.
Remove the holder/s from the portable
control.
Remove the tape from the 8 or 4 position
switch assy.
Move the lever and check if the switches
make a “click” sound when they are pressed.
IMPORTANT!
THE SWITCHES CLICK MUST BE GOT
WITHOUT MAKE ANY OVERPRESSURE ON
THE HOLDERS HANDLE.
TO REPLACE THE 2 POSITION HOLDERS:
Remove all wires and micro switches from
their holder.
Remove the wires and the switches.
Install switches and wires on the new holder
(
5.14).
IMPORTANT!
THE WIRES MUST BE FITTED ON THE MICRO
SWITCH IN OPPOSITE POSITION COMPARED
TO THE DRAWING REPORTED ON 2
POSITION SWITCH. COMAND WIRES MUST
BE FITTED ON PLUG #1 ONLY WHILE THE
COMMON ONES MUST BE FITTED ON MIDDLE
PLUG #2 ONLY (Fig.100).
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