Fresmak ARNOLD-mat Manual De Instrucciones página 7

D.- Hydraulic Power Setting.
If over the time the pressure decreases , the oil chamber should be resetted by following the steps
below:
1. Dismantle as shown in "C" until the hydraulic unit is detached.
2. Hold carefully , in horizontal position, the assembly of part cylinder-holder Nº 2005 ensuring
that one of the slot-hole stays upwards.
3. Introduce in the slot-hole one of the 2 side allen set screws Nº 2004 avoiding that part fixed
cylinder Nº 2031 turns.
4. Loosen screw Nº 215.
5. With a key (DIN 1804) screw part Nº 2024 into cylinder-holder Nº 2005. Normally it should
turn 360º as maximum.
6. Assemble it on the vice and check if the pressure is restored.
E.- Hydraulic oil filling up.
1. Dismantle as shwon in "C" above.
2. Unscrew the allen set screw Nº 215 and cap Nº 2024 from cylinder-holder Nº 2005. Do not
mislay the belleville springs Nº 213 and holder Nº 2026.
3. Replace seal Nº 009-090; 2032-125/160 into cylinder-holder Nº 2005 (with the sealing lips
towards bottom).
4. Introduce fixed cylinder Nº 2031 into cylinder-holder Nº 2005 matching the holes of both parts.
5. Fit allen set screw Nº 2004 in their lodgements and with an air line pressurise for the seal Nº
009-090; 2032-125/160, self-fit in position.
6. Helping with allen set screws Nº 2004, push parts Nos. 2031 and 009-090; 2032-125/160 until
the end of cylinder-holder Nº 2005.
7. Pour hydraulic oil through the central hole of part Nº 2031 until the level reaches the top,
checking that the oil chamber is completely free of air bubbles. If required, stir with a clean
wooden toothpick or similar and refill to the top.
8. Now, without taking out the allen set screws, replace gently seal Nº (410-90;2033-125/160)
into small piston Nº 2029 and introduce it into fixed cylinder Nº 2031.
9. Replace the belleville springs Nº 213, the holder Nº 2026 and threaded spindle Nº 2008 and
screw the cap Nº 2024. Screw this cap with a key (DIN 1804) until the end. Replace screw Nº
215.
F.- Final setting and regulating.
Whether a power setting on or an oil refilling has been completed, check if the operation has been
successful, before fitting the spindle in the vice.
1. Assemble with screw Nº 202 the hydraulic unit with the clutch unit.
2. Hold the assembly – by the threaded spindle- in horizontal position and introduce an allen set
screw into the hole of fixed cylinder Nº 2031.
3. Fit the handle and make the whole movement. When turning it must check for the slight treshold
pressure. The clutch must cover the whole movement until making mechanical stop. If so, the
assembly is correct.
4. If the mechanical stop is not acheived, unscrew the cap Nº 20224 and try it again.
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