BVA Hydraulics HDG10012 - Manual (Page 4)

4
BEFORE USE
1. Before using this product, read the owner's manual
completely and familiarize yourself thoroughly with the
product, its components and recognize the hazards
associated with its use.
2. Verify that the product and the application are compatible.
If in doubt, call BVA Hydraulics Technical Service (888)
332-6419.
3. Inspect before each use. Do not use if bent, broken, leaking
or damaged components are noted.
4. Replace worn or damaged parts and assemblies with BVA
Hydraulics authorized replacement parts only. Lubricate as
instructed in Maintenance Section.
5. Ensure method of confirming load is accurate and working
properly. Have gauge or load cell accuracy verified by
qualified personnel on a yearly basis.
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 fluid used. An improperly matched system can
cause the system to fail.
WARNING: All personnel and equipment 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 fluid and change as
recommended or sooner if the fluid becomes contaminated
(never exceed 400 hours). Follow pump manufacturers
instructions for changing and adding hydraulic fluid. Use
only good quality hydraulic fluid. 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 fluid, transmission fluid,
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.
4. Use an approved, high-grade pipe thread sealant to seal all
hydraulic connections. Teflon 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 flow of fluid and adversely affect function.
Figure 2 - Illustration to bleed air from system
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Lubrication & Cleaning
Keep cylinder clean at all times.
1. Any exposed threads (male or female) must be cleanedand
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 first 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 filler plug/screw.