Hi-Force HHA Series 사용 설명서 - 페이지 3

{카테고리_이름} Hi-Force HHA Series에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. Hi-Force HHA Series 4 페이지. Hydraulic cylinders

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Model Series: HVL, HPS, HLS, HSS, HAS, HHA, HHS, HHR, HDA, HFL, HFG, HSG, HGG, HPC.

of the cylinder several times until the operation is

smooth.

Double Acting Cylinders: Position the cylinder

below the level of the hydraulic pump. On its side

with the couplings facing upwards (as in B. in the

diagram above). Fully extend and retract the piston

several times until the operation is smooth.

Note: When long hoses are used (especially in the

case of smaller capacity cylinders) the above

procedure may not completely remove all the air

from the system. In these cases contact your Hi-

Force representative for advice on pre-filling hoses

with hydraulic oil.

Note: Fitting adaptors to cylinders. The collar

threads are designed to facilitate the full capacity of

the cylinder when the adaptors are fully engaged

over the full collar thread length.

Warning:

Some

require that the cylinder be used at no more

than 50% of its rated capacity. Refer to the

accessory instructions for additional information.

5.0 Operation.

A hydraulic is required to operate the cylinder

ranges covered by this instruction. Please refer to

relevant Hi-Force hydraulic pump operation

instructions for full details of the chosen pumps

relevant instructions.

Single Acting cylinders have different methods of

return of the piston, these are either spring assisted

return or load assisted return.

Double Acting cylinders have the piston powered in

both directions by means of the hydraulic pump

used.

The cylinder stop ring where fitted is

designed to withstand the full load of the

cylinder. However it is advisable to reduce wear and

extend the service life of the cylinder that the

operator uses less than the full stroke and load

wherever possible.

On models of cylinder where a stop ring is

fitted it is imperative that the piston is not

over extended. On these models, Hi-Force, employs

a red marker band on the piston which will become

visible when the maximum stroke length of the

piston has been achieved. Any attempt to extend

the piston beyond this point will cause hydraulic oil

Hi-Force Limited – Prospect Way – Daventry – Northants NN11 8PL – United Kingdom

Tel: +44(0) 1327 301000: Fax: +44(0) 1327 706555: Website: www.hi-force.com

INSTRUCTION MANUAL – HYDRAULIC CYLINDERS:

cylinder

attachments

to by-pass via the overflow hole in the cylinder. This

action when performed with the cylinder under

pressure can damage the seals. Should this action

have taken place the cylinder must be returned to

your local Hi-Force authorized service centre for the

seals to be replaced.

Base Mounting holes (where provided) are

not suitable for withstanding the full

retraction force of double acting cylinders. These

mounting holes are for location purposes only.

When lowering loads on both single and

double acting cylinders, the load may

descend faster than expected. The use of a manual

check valve (HFV66) is recommended for precise

load lowering control.

Tilting saddles are fitted as standard to

certain models of Hi-Force cylinders and are

available as an operational accessory on other

models. These saddles accommodate up to 5

misalignment of load, and will reduce (but not

eliminate) the risk of cylinder damage due to lateral

Always ensure that the piston of the cylinder

contacts the load to be lifted as squarely as

possible – this also applies when tilting saddles are

used.

HFL and HFG – Failsafe cylinders

Hi-Force HFL and HFG Models are fitted as standard

with a failsafe locking ring. The purpose of this

feature is should the application requires that the

cylinder becomes the load holding device, the

locking collar can be screwed down the piston until

it comes in contact with the cylinder barrel.

Applying the lock ring in this manner provides a

mechanical support to the load that is being lifted.

With the lock ring fully engaged, the hydraulic

pressure can be released from the system and the

cylinder becomes a solid mechanical support.

Always ensure that the lock ring is in full

contact with the cylinder barrel before

releasing the system pressure.

HPC Pull Cylinders:

All Pull cylinders must be operated with the

full Clevis/Eyelet attachments engagement

utilized.