Cembre HT51D Manual De Uso Y Mantenimiento página 7

4. MAINTENANCE
Air in the hydraulic circuit may aff ect the performance of the tool; e.g. no lower die advance-
ment, slow advancement of the lower die; lower die pulsating.
In this case proceed as follows:
4.1) To purge air bubbles from hydraulic circuit
a – Hold tool upright in a vice with handles open (see Fig. 4).
b – Unscrew the main handle (4) from the body (10) to expose the rubber oil reservoir (11).
c – Remove reservoir cap (12).
d – Operate moveable handle (7) several times, in order to advance the ram.
e – Press the pressure release lever (3) to retract the ram, discharge oil pressure from the
circuit and return all oil to the reservoir.
f – Repeat points (d - e) fi ve times, to ensure all air bubbles in the hydraulic circuit are
purged into the reservoir.
g – Remove all air from reservoir.
If the oil level is low, top up as directed in paragraph 4.2.
h – Fit reservoir cap (12).
i – Assemble main handle (4) to tool body.
If the tool continues to malfunction, return the tool to Cembre for service/repair as
detailed in § 5.
4.2) Oil top up
Every six months check the oil level in the reservoir. If necessary, top up the oil level to the
top lip of the reservoir and remove all air from the reservoir, see 4.1, points a, b, c, and e,
fi nally, complete with operations h and i.
Always use clean recommended oil, see § 1.
Do not use old or recycled oil.
Do not use hydraulic brake fl uid.
Ensure that disposal of used oil is in accordance with current legislation.
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