Larzep W07807 User manual

INSTRUCTIONS AND MANUAL
W07807 X07807
2 SPEED HAND PUMP 7500 cc
LARZEP, S.A. LARZEP AUSTRALIA PTY. LTD. LARZEP GB LTD.
Avenida Urtiaga, 6 104 Wedgewood Road, 3 Commerce Way - Leighton Buzzard
48269 MALLABIA, SPAIN HALLAM, VIC. 3803 AUSTRALIA BEDS LU7 4RW UNITED KINGDOM
Tel. [phone] Tel. [phone] Tel. [phone]
Fax. [phone] Fax. [phone] Fax. [phone]
e-mail: [email protected]m e-mail: [e-mail] e-mail: [e-mail]
www.larzep.com www.larzep.com.au www.larzep.co.uk

2
Instruction Manual
Hydraulic Hand Pump “W07807”, “X07807”
INDEX
1. BEFORE USING THE EQUIPMENT AND SECURITY---------------------------2
2. WARRANTY----------------------------------------------------------------------------------2
3. TECHNICAL FEATURES-----------------------------------------------------------------3
4. START UP ------------------------------------------------------------------------------------3
5. MAINTENANCE-----------------------------------------------------------------------------4
6. DIMENSIONS --------------------------------------------------------------------------------5
7. DECLARATION OF CONFORMITY ---------------------------------------------------6
1. BEFORE USING THE EQUIPMENT AND SECURITY
Read the instructions manual carefully and practise using the equipment before application.
Use protective equipment such as safety goggles, boots and gloves.
Goggles Boots Gloves
Define stable zones for applying the load and safety zones for operators, separating them through the use of hoses of sufficient length.
Block loads mechanically once the movement has been completed and avoid operating underneath them.
Use all the cylinder’s useful support surface, both on the head and the base. Be prepared to use tilting heads if applying lateral loads.
Remove loads before carrying out maintenance operations and always work in clean, well-lit areas.
Include control elements (pressure gauges) in the installation in order to enable the operator to monitor the pressure in the system and ensure that
the equipment’s nominal capacity is never exceeded. Be prepared to use safety valves and accessories if the safety criteria demand it.
The pump controls should be activated manually, as should the connections between elements equipped with couplers.
Once you have finished using the device, check that it has not been damaged, clean it and protect it ready for storage.
Clean the couplers before connecting and make sure the connections are perfect (first insert as far as the plug will go and then screw in by hand).
A bad connection may result in improper functioning and may even generate a safety hazard.
Install the device in such a way as to ensure that the hoses are not subjected to sharp or forced bends or thrust actions that may cause them to
break.
Do not modify the device (welded parts, lengthening drive levers, etc.) without consulting the manufacturer.
Do not use the hoses for transporting the device. Use the handles on the cylinders (when appropriate) and set the pump lever to the transportation
position.
When filling the pump with oil, always use LARZEP hydraulic oil or another oil of similar characteristics. Fill only to the indicated level and
remember that the cylinder piston should be back.
Before starting operation, check that the installation is correct, the operator position is safe and the working zone is out of bounds to all personnel.
In all cases, the operator should have received adequate training regarding the handling of the device and logical safety criteria associated with the
movement of heavy loads.
2. WARRANTY
LARZEP, S.A. guarantees its products against all design and manufacturing defects during two years from the date of purchase. This guarantee does
not include the ordinary wear of both metal and non-metal parts, abuse, using the equipment beyond its rated capacity and any wear or damage
incurred as a result of using a hydraulic fluid which is not recommended by LARZEP, S.A.
Please note that if the equipment is disassembled or serviced by anyone other than an authorized service dealer or by LARZEP, S.A., this guarantee
is rendered null and void.
In the event of a warranty claim, return the equipment, to LARZEP, S.A. or the authorized dealer which sold you the hydraulic equipment, LARZEP,
S.A. will repair or replace the faulty equipment, whichever is deemed most appropriate. LARZEP, S.A. shall not be held liable for any consequential
damages or losses, which may occur as a result of faulty equipment
The correct union of a pump to a cylinder via a hydraulic hose constitutes a machine designed for lifting, pulling,
folding and retaining operations, etc., that, due to its high thrust capacity requires safe use in order to eliminate the risk
of accidents.
Choose the most suitable model for the application from the wide range available, and make sure that it will not exceed
80% of its nominal capacity during normal operation.
Do not exposure the equipment to intense heat sources (welding).

3
Instruction Manual
Hydraulic Hand Pump “W07807”, “X07807”
3. TECHNICAL FEATURES
The “W” Hand Pumps are compact, light and portable used to power single acting-cylinders, they operate horizontally or vertically, with pump head
downwards.
All models with pressure relief valve.
The two speeds pumps are recommended for applications where the cylinder plunger must move rapidly, also for larger cylinder hook-ups where
greater oil capacity is required.
All pumps have 3/8”-18 NPT female ports.
The “X” models are automatic two-speed pumps with a 4-way control valve for operation of double acting- cylinders. Internal pressure relief valves for
overload protection.
Two-speed operation for high tonnage cylinders where oil capacity and fast economical cycle time is needed.
REFERENCE
SPEEDS
USABLE OIL
OIL DISPLACEMENT
PER STROKE
PRESSURE RATING
WEIGHT
1º STAGE/ 2º STAGE
1º STAGE/ 2º STAGE
W07807
2
7500 CC
120.5 / 4,6
20 / 700
24,9 Kg
X07807
2
7500 CC
120,5 / 4,6
20 / 700
26,3 Kg
4. START UP

4
Instruction Manual
Hydraulic Hand Pump “W07807”, “X07807”
Unpack and visually check all the components, making sure that there are no oil leaks, loose or damaged plugs, damaged threads, etc. Never
use components that are damaged or appear to be in poor condition.
Assemble the device in accordance with the instructions given in the diagram, first checking that you have all the necessary material.
Check the correct installation and perfect functioning of the device with a load, in accordance with the procedure outlined below:
SINGLE ACTING INSTALLATION
1. Place the distributor valve in central position.
2. Pump manually; with the oil filling plug opened, several times to allow the entry of air in the pump and make easier the suction
3. Close the plug by turning clockwise manually. You do not need to close too tightly.
4. Place the distributor valve in advance position and pump using the drive lever. First, fill the hose with oil. The number of strokes required will
depend on the length of the hose and the flow supplied by the pump piston. With two-speed pumps, the large piston will be activated during
the load-free feed movement, and when the device comes into contact with the load, an internal large piston relief value will be
automatically triggered and only the oil supplied by the small piston will be available up to 700 kg/cm2, which is the maximum pressure for
the device.
5. Once the hose is full of oil, the cylinder piston will start to advance.
6. If the cylinder has a mechanical limit switch capable of withstanding the maximum device pressure, continue pumping until the limit switch is
reached.
7. If any control elements (pressure gauges) are available, you will be able to see how the pressure increases along with the effort required
moving the lever.
8. Keep pumping until you obtain the maximum pressure (700 kg/cm2). In this way you will be able to check the correct functioning of the
internal safety valve and the absence of oil leaks in the installation.
9. Maintain pressure in the installation for a short period of time (1 minute) without pumping (central position), in order to check the correct
functioning of the pump’s check valve.
10. To retract the cylinder, place the distributor valve in return movement. If the cylinder has a return spring (SM, SMP, SMX, SH, TE, T, SAM,
SAH, SATM, CY, KC) the piston will move back automatically. The return speed may be slow in some applications. In this case, we
recommend the use of double effect cylinders. In the case of load return cylinders (SP, SPR, SX,SL, SSR, ST, STR,STX, SAT), you will
need to push the piston back using more or less force, depending on the size and position of the cylinder.
11. In cylinders without a mechanical limit switch (SSR, ST, STR, STX) this type of test cannot be carried out. If you do not have a test bench,
you will have to test the installation using the actual load in the application. This operation should be carried out with extreme care by
experienced personnel and maximum safety measures should be applied.
12. Repeat the process as many times as necessary until you is comfortable handling the device.
13. If using close or check valves, or working with various cylinders via flow distributors, remember to take into consideration the effect these
accessories may have on the functioning of the device, and establish an operating procedure in order to avoid unwanted effects.
DOUBLE ACTING INSTALLATION
1. The connection of the couplers is, if possible, even more important here, since a bad connection will not only prevent the device from
functioning, it may also generate excessive pressure build-up that may cause the break of the cylinder. Take note of which hose connects to
the advance chamber and which to the return chamber.
2. All double action LARZEP cylinders are equipped with a mechanical end of stroke capable of withstanding the nominal pressure. You can
therefore carry out the test described in the previous section. If you are working with another type of cylinder and are not 100% sure, do not
carry out this test.
3. Turn the control of the distributing valve to the central position and pump and few times to fill the internal channels with oil.
4. Turn the lever to one side and pump. Oil will flow through the hose connected to the side to which the valve lever is rotated. If this hose is
connected to the cylinder’s thrust chamber, the piston will move forward. The oil in the return chamber will flow freely through the other hose
to the pump tank. Flow is supplied by both the large and small pistons until the cylinder reaches the load.
5. Continue pumping until you reach the mechanical end of stroke. At this moment an internal large piston relief value will be triggered, and
only the oil supplied by the small piston will be available. Subject the installation to pressure to check for leaks.
6. Stop pumping and check (preferably using a pressure gauge) that the installation maintains the pressure level.
7. Turn the valve lever to the other side and pump. Oil will flow to the return chamber and the piston will move back. The oil in the advance
chamber will flow freely back to the tank.
8. Repeat the processes as many times as necessary until you are comfortable handling the device.
9. If using close or check valves, or working with various cylinders via flow distributors, remember to take into consideration the effect these
accessories may have on the functioning of the device, and establish an operating procedure in order to avoid unwanted effects.
5. MAINTENANCE
Checking the oil level.
With the pump in vertical position, unscrew or pry off the plug. Check the level on the dip stick.
This check must be carried out with the cylinder fully retracted. Excessive amount of oil in the tank will lead to internal pressures which will
hamper the function of the pump.
Filter the oil before filling up the pump.
Once the equipment is being used the areas exposed to wear and oxidation must be cleaned and greased.

5
Instruction Manual
Hydraulic Hand Pump “W07807”, “X07807”
BREAK DOWNS AND REPARATIONS
6. DIMENSIONS
THE CYLINDER DOESN´T AVANCE
Lack of oil in the tank ____ Check the oil.
Couplers not fully inserted ____ Check couplers.
Admission ball valve failure (19) ____ Clean the seat and
replace the ball.
Closing ball valve failure (22) ____ Clean the seat and
replace the ball.
THE CYLINDER DOESN´T REACH WORKING PRESSURE.
Relief valve decalibrated (12) ____ Calibrate the valve.
Retention ball valve failure (20) ____ Clean the seat and replace the ball.
Closing ball valve failure (22) ____ Clean the seat and replace the ball.
Pressure seal damaged (26) ____ Replace the seal.
Cylinder pressure seal damaged (see cylinder) ____ Replace the seal.
THE CYLINDER DOESN´T RETRACT
Too much oil in the tank ____ Check the level.

6
Instruction Manual
Hydraulic Hand Pump “W07807”, “X07807”
7. DECLARATION OF CONFORMITY