Bva-hydraulics H0500--H3008 Manuel d'utilisateur télécharger pdf (Page 6)

OPERATION

Operate the hydraulic pump to advance and retract the cylinder.

Do not continue pumping when cylinder is fully extended.

Internal pressure will build up and may damage the seal of

the cylinder.

WARNING: To help prevent material fatigue if the

cylinder is to be used in a continuous application, the

load should not exceed 85% of the rated capacity.

WARNING: Your cylinder, hose(s), couplings and pump

all must be rated for the same maximum operating

pressure, correctly connected and compatible with the

hydraulic uid used. An improperly matched system can

cause the system to fail.

WARNING: All personnel must be clear before lowering

load.

MAINTENANCE

1. Inspect hoses and connections daily. Replace damaged

components immediately with BVA Hydraulics Replacement

Parts only.

2. Tighten connections as needed. Use pipe thread sealing

compound when servicing connections.

3. Always use clean, approved hydraulic uid and change as

recommended or sooner if the uid becomes contaminated

(never exceed 400 hours). Follow pump manufacturers

instructions for changing and adding hydraulic uid. Use

only good quality hydraulic uid. We recommend Mobil

DTE13M or equivalent when using with hand pump or air

pump; BVA Hydraulics Oil (F01) or equivalent when using

with electric pump. Never use brake uid, transmission uid,

turbine oil, motor oil, alcohol, glycerin etc. Use of other than

good quality hydraulic oil will void warranty and damage the

cylinder, pump, hose etc.

Use an approved, high-grade pipe thread sealant to seal all

hydraulic connections. Teon tape can be used if only one layer

of tape is used and it is applied carefully (two threads back) to

prevent the tape from being introduced into hydraulic system.

A piece of tape could travel through the system and obstruct

the ow of uid and adversely affect function.

Figure 2 - Illustration to bleed air from system

Lubrication & Cleaning

Keep cylinder clean at all times.

1. Any exposed threads (male or female) must be cleaned and

lubricated regularly, and protected from damage. Lubricate

with light machine oil.

2. If a cylinder or ram has been exposed to rain, snow,

sand, airborne abrasive, or any corrosive environment, it

must be cleaned, lubricated, and protected immediately

after exposure. Daily clean exposed ram with clean cloth

dampened with light machine oil. Protect exposed ram from

the elements at all times.

3. Keep the hydraulic system as free of dirt as possible. When

not in use, couplers must be sealed with dust covers. All

hose connections must be free of dirt and grime. Any

equipment attached to the cylinder must be kept clean.

Storage

Cylinders should be stored vertically with ram plunger fully

retracted in a dry, protected area, not exposed to corrosive

vapor, dust or other harmful elements. When a cylinder has

not been used for a period of 4 months, it should be connected

to a pump and fully extended and then retracted a minimum

of 5 times. This cycle will lubricate the cylinder wall, reducing

the possibility of corrosion and damage thereof.

How to remove faulty coupler:

If cylinder does not retract,

1. Secure load by other means.

2. Depressurize pump and hose.

3. Remove the cylinder from application.

4. Disconnect and replace with new coupler.

NOTICE: Do not attempt to grasp with pliers or wrench

without rst wrapping the jaws of such tool with rags or similar

padding.

How to bleed air from system:

1. Place pump at a higher elevation than the hose and cylinder

as shown in Figure 2.

2. Operate pump to fully extend and retract the cylinder 2 or 3

times. The objective is to force the air bubbles up hill and

back to the pump reservoir.

3. Follow pump instruction manual to bleed the air from pump

reservoir. On most pumps, air can escape by opening the

oil ller plug/screw.

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Bva-hydraulics H0500--H3008 Manuel d'utilisateur Page 6

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