Fresmak ARNOLD-TWIN Manual De Instrucciones página 8

A simple cleaning operation is usually sufficient by using the side vents.
We recommend a suction pump system as opposed to compressed air which could cause
injury. A complete cleaning operation should be carried out every 1000 working hours. To do so,
the 4 flange-clamp screws (#4051) must be loosened, the central jaw removed, and the assembly
of the 2 bolts and the spindle with the protector plates taken out of the vice body taking care to
avoid the bolts from rotating in the spindle.
The next step is to clean the vice body and the swarth in the spindles and inthe interior of
both bolts.
We recommend that all sliding surfaces should be greased.
C.- Instructions for Changing and Replacing the Spindles
1) Loosen the central fixed jaw (#4106) or (#4131), body dowel pins (#911) and the 4 flange
screws. Then take out the whole assembly (bolts, spindles and side jaws).
2) Unscrew the Allen set screw (#014)(in the 90 model the # is 004) and detach the flange-
regulator assembly from the hydraulic unit. The main spindle (#4009) has two flat surfaces on
either end to simplify this operation. The bolt (#4107) is now unscrewed from the main spindle
(#4009).
3) To release the other bolt (#4102), unscrew the set screw (#215) located on the nut of the piston
(#4035) and then unscrew this piston. This way one can take out the nut (#4102) and the main
right spindle (#4003)(in the 90 model loosen nuts #4042 and #4043).
4) If the spindle rotates when taken out, the nuts may have come off-centre. When this occurs
the nuts must be centred before setting the jaws.
D.- Disassembling the Hydraulic Unit
1) Loosen the set screw (#215) located in the deposit (#4004), unscrew the main spindle (#4009)
thus detaching it from the cylinder (#4004)
2) Remove the belleville springs(#007)(in the 90 model #213), and take out the small piston
(#012)(in the 090 model #4029).
3) Remove the cylinder (#4004), the piston (#4034), the washer (#4005), and the small and large
seals. With the 125 model remove the cover (#4037) and the seal (#011).
E.- Hydraulic Oil Refilling
1) Place the small seal (#009) facing up in its setting in the cylinder. Then introduce the cylinder
(#4005) washer down in the opposite direction.
2) The seal (#011) and cap (#4037) are attached to the piston which is then introduced into the
cylinder. In order to asure the correct position of the seals, one must blow air from one of the
ends of the piston. (The 090 model has no seal or cap).
3) Placing the assembly in a vertical position, the piston is then filled with hydraulic oil to maximum
capacity making sure that there is no air trapped in the oil. This can be done by stiring a thin
rod and thus removing any visible bubbles.
4) We recommend hydraulic oil with a 6,5 E/50º viscosity (for example, Renolin MR 20 – Fuchs).
5) The piston (#012)(in the 090 model – #4029) is slowly introduced into the cylinder, sealing the
chamber. The piston must be perfectly clean so as not to damage the interior.
6) Holding the main spindle (4009), introduce the belleville springs (#007). Thread the deposit
(#4004) to the spindle until the springs (#007) are compressed, (in the 090 model – #213). The
hydraulic unit is now assembled.
7) Introduce the piston (#4028) inside the spindle (#4009).
8) Thread the main spindle (#4009) in the flange assembly.
9) Rotate the clutch spindle (#4139) (in the 090 model - #4019) to its full length. To do this, position
the regulator at location 5. The spindle is regulated by the degree of pressure applied on
tightening the spindle (#4009) to the deposit (#4004). If the turn of the handle is too tight, it
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