How To Purge Air Bubbles From Cembre Hydraulic Crimping Tool – Model HT51

Published 12 Jun 2018

Cembre HT51 Hydraulic Crimping Tool

Cembre HT51 Hydraulic Crimping Tool

  • Uploaded by Chris Dodds - Thorne & Derrick Sales & Marketing Manager

Cembre HT51

Thorne & Derrick International are Main UK Stockists and Suppliers of Cembre tools including crimping and cutting types for all constructions of LV MV HV cable including medium/high voltage 11kV/33kV power cables.

The following short article provides useful instructions about how pure air bubbles correctly from the Cembre hydraulic circuit in relation to model HT51 cutting tool – built in safety valve also by-pass the oil supply when maximum pressure has been reached.

The following excerpts are taken from the Operating Manual of Cembre HT51 hydraulic crimping tool – however this information applies to the following tool model variants Cembre HT51-KV (insulated version).

Cembre HT51 crimping tool is lightweight and ideal for use in working confined switchgear and other LV-HV cable jointing, splicing and terminating applications.

The hydraulic crimping tool features spring loaded handles allowing the Cembre die sets to be advanced with one hand – the other hand is free to position the electrical connector or cable lugs prior to crimping.

For competitive prices, stock availability and technical advice about the Cembre HT51 tool please do not hesitate to contact us.

Purging Air Bubbles From Cembre HT51 Crimping Tools

Cembre Crimping Tool

HT51 Crimping Tool Position For Maintenance Operations

Air in the hydraulic circuit may affect the performance of the crimping tool. For example no lower die advancement, slow advancement of the lower die and lower die pulsating would all cause issues.

If this is the 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 reservoir (03).

c Remove reservoir cap (02).

d Operate moveable handle (36) several times, in order to advance the tool 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 below.

h Fit reservoir cap (02).

i – Assemble main handle (04) to tool body.

If the tool continues to malfunction return the tool for service.

Oil Top Up

Every six months check the oil level in the reservoir. If necessary, top up the oil level to the upper lip of the reservoir and remove all air from the reservoir (as described above).

Always use clean recommended oil – AGIP ARNICA 32 or SHELL TELLUSTX 32 or equivalent for HT51 and AGIP ITE360 or ESSOTRANSFORMER P60 or equivalent for HT51-KV

Warning:  Do not use old or recycled oil

Warning:  Do not use hydraulic brake fluid

HT51-KV tool contains oil with a high insulating power so it is imperative that you don not pollute it with other types of oil!

Cembre HT51

Cembre HT51 supplied with protective carrying case, tool manual and crimp die sets

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Cable Crimping & Cutting Tools

This post is from a series of articles written to provide advice and guidance on the care and servicing of Cembre cable cutting and crimping tools.

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