Cembre ht51 Operation And Maintenance Manual page 6

ENGLISH
4. MAINTENANCE (Ref. to Fig. 3)
Air in the hydraulic circuit may affect the performance of the tool; e.g. no lower die advancement,
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 (Fig. 3).
b – Unscrew the main handle (04) from the body (13) to expose the rubber oil reservoi (03).
c – Remove reservoir cap (02).
d – Operate moveable handle (36) several times, in order to advance the ram (16).
e – Press the pressure release lever (44) to retract the ram (16), discharge oil pressure from the circuit
and return all oil to the reservoir.
f – Repeat points (d - e) five 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 (02).
i – Assemble main handle (04) to tool body.
If the tool continues to malfunction, return the tool 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, finally, 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 fluid.
HT51-KV tool contain oil with a high insulating power, do not pollute it with other types of oil!
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Ensure that disposal of used oil is in accordance with current legislation.
5. RETURN TO Cembre FOR OVERHAUL
In the case of a breakdown contact our who will advise you on the problem and give you the neces-
sary instructions on how to dispatch the tool to our ; if possible, attach a copy of the Test Certificate
supplied by Cembre together with the tool or, if no other references are available, indicate the
approximate purchase date and the tool serial number.
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