SYB-A manual dual speed single outlet oil pumpDetailed product description：

Introduction

SYB-A manual oil pump is a small hydraulic pump station that converts manual mechanical energy into liquid pressure energy. Installing a pedal and spring reset mechanism can be changed to foot operated.  
With the matching oil cylinder and specialized tools, various operations can be carried out, such as lifting, bending, straightening, shearing, riveting, assembly, disassembly, and some construction and military construction.
The main characteristics of an oil pump are: manual power, high pressure, ultra small size, easy to carry, simple operation, and wide application range.  

Technical parameters

Model number	work pressure MPa		Maximum displacement Ml/time		Maximum shaking force N	Fuel tank capacity L	Export Snail Stripe metric system	Overall dimensions Length × Width × Height	Weight Kg
	High pressure	low pressure	High pressure	low pressure
SYB-A	sixty-three	one	two point three	twelve point five	five hundred	zero point seven	M16X1.5	600X100X150	nine
SYB-A/0.7	sixty-three	one point five	two point three	fourteen point five	five hundred	zero point seven	M14X1.5	635X110X140	eight
SYB-A/3	sixty-three	one point five	two point three	fourteen point five	five hundred	three	M14X1.5	350X160X140	ten

Schematic diagram


Connection diagram





SYB-A/0.7 Manual Pump Diagram
1. Piston 2, Unloading Handwheel 3, Oil Port Socket 4, Pressure Rod 5, Bleeding Port 6, Oil Injection Port 7, Low Pressure Safety Valve 8, High Pressure Safety Valve
2. Boosting: Based on the above, the high-pressure plunger continues to work and the pressure gradually increases. When the pressure exceeds the rated pressure of 63MPa, the high-pressure valve opens and high-pressure oil overflows from the high-pressure valve back into the oil storage pipe, keeping the pressure at 63MPa. A high-pressure valve is a safety valve.
3. Work: During the work process, due to the work done by the working cylinder, the energy will decrease. Therefore, it is necessary to shake the handle at any time to maintain the required working pressure until the work is completed.
4 Unloading: After the oil pump is working, the pressure needs to be reduced to zero, the unloading valve is opened, and the oil flows back to the storage pipe. Complete the uninstallation process.
The processes of oil filling, pressure boosting, and operation are actually inseparable, and can be completed by simply shaking the handle.
SDB-2 is a dual outlet oil pump that adds a manual directional valve to SDB-1 and removes the unloading valve accordingly. Use manual directional valves to complete directional and unloading work.

Main Structure and Functions of Each Part

The manual oil pump consists of the following parts: 1. Pump body part; 2. Handle part; 3. Oil storage tank; 4. Rear seat section
1. Pump body part: The pump body part is the main part of the oil pump, including the high-pressure working chamber, low-pressure working chamber, two check valves, high-pressure valve (safety valve), low-pressure valve, unloading valve, two check valves, inlet port, etc. Each hole is organically connected together.
Two one-way valves are used to prevent pressure oil from flowing back. The specifications and functions of two one-way valves are the same. The function of low-pressure valves and high-pressure valves is pressure control. Control the pressure at 1.5MPa and 63MPa respectively. The two steel balls at the oil inlet are check valves. After the work is completed, loosen the unloading valve and allow the pressure oil to flow back to the oil storage pipe to complete the unloading work.
2. Handle part: mainly composed of a pressure rod and a pressure handle. Connected to the pump body and plunger by two pins. The manual force acts on the pressure rod, driving the plunger to make reciprocating motion, generating the pressure of the oil.
There are oil filling and drainage holes installed on the rear seat or fuel tank. Loosen the screw to release and intake air. Please open the vent valve when using.
Usage and safety precautions

5.1 Normal use of oil pump: When working at a pressure of 63MPa, the performance of the oil pump is fully utilized, which is the most reasonable use and does not require adjustment in any part. When the actual working pressure is below 63MPa, no adjustments are needed at any point.
5.2 Expand the scope of use of the oil pump: To adapt to the matching oil cylinder, it can work at pressures below 63MPa. At this point, connect the pressure gauge to the rubber hose and adjust the high-pressure valve. When the pressure reaches the working pressure of the oil cylinder, it can be used. In order to meet the needs of large tonnage and large stroke operations, large fuel tanks or auxiliary fuel tanks can be designed and manufactured separately.

5.3 Safety precautions:
1) Do not work under a pressure exceeding 63MPa. Do not arbitrarily adjust the high and low pressure valves.  
2) When working, the handle should be shaken smoothly without causing any impulse in the oil circuit, in order to ensure that all valves work continuously.  
3) When reducing pressure, the handwheel should be slowly twisted and not allowed to reduce pressure too quickly.  
4) When the oil level is insufficient, do not inject oil under pressure to avoid pressure in the oil storage pipe during oil return.  
5) Ensure proper connections at all locations before starting work.  
6) High pressure hoses should undergo a pressure test every six months to prevent accidents caused by hose aging. When the test pressure is lower than 90MPa, it cannot be used in case of protruding leakage.

Maintenance and Care
6.1 Keep all parts of the oil pump clean regularly, and there should be no dust or dirt around the valves and plungers.
6.2 Strictly follow the safety precautions for use.
6.3 The working fluid is YB-N32. When the ambient temperature of the hydraulic oil is below 10 ℃, YB-N22N hydraulic oil can be used instead. It is strictly prohibited to use media containing water or corrosive to steel.
6.4 The working fluid must be filtered and cleaned using a 120-160 mesh filter.
6.5 When using, handle with care and there should be no collision. The pressure rod should be tightened to avoid damaging the thread.
6.6 When in use, non painted surfaces should be coated with a layer of industrial Vaseline oil to prevent rusting.
When not in use, it should be packed in a wooden box and stored in a dry and suitable temperature room.
When the high-pressure rubber hose selected by the user leaves the factory, it undergoes a pressure resistance test of 1.25 times the rated pressure. The aging of the ground glue should be checked regularly, every six months, when using it for a long time. When conducting a pressure test, if there is leakage, protrusion or explosion, it must be replaced. When using, avoid sharp bends and do not get too close to the hose to prevent explosion and injury.

Oil pump malfunction and troubleshooting

Phenomenon of malfunction	Main reasons	Elimination Method
1. Insufficient or no pressure. When the pressure rod is shaken, the oil cylinder does not work or cannot output the rated pressure.	1. The pressure adjustment of the high-pressure valve is too low	Check the pressure of the hydraulic system with a pressure gauge. If the pressure is below 63MPa, tighten the pressure valve screw to reach the specified value.
	2. High pressure valve spring damaged or losing elasticity	Replace the high-pressure valve spring
	3. Is the high-pressure valve slightly worn?	The method of repairing the political valve mouth: lightly tap the first level precision steel ball 1-2 times with your hand. If it is severely worn, you can use a drill bit to re drill it flat. If it is even more severe, the pump body will be scrapped.
	4. Is there slight wear on the valve mouth of the unloading valve?	The method of repairing the political valve mouth: lightly tap the first level precision steel ball 1-2 times with your hand. If it is severely worn, you can use a drill bit to re drill it flat. If it is even more severe, the pump body will be scrapped.
	5. Wear of oil pump column plug hole	Replace the plunger and correct the plunger hole.
2. The oil pump experiences a sudden decrease in oil delivery and pressure during use.	1. The high-pressure spring undergoes permanent deformation or is broken	Replace the high-pressure valve spring
	2. The low-pressure valve spring undergoes permanent deformation or is broken	Replace the low-pressure valve spring
	3. Impurities in the low-pressure valve have damaged the sealing of the check valve, one-way valve, and low-pressure valve	Disassemble the oil pump, clean it with gasoline or light oil, reassemble and inject clean oil
3. The oil pump's fuel delivery rate decreases, and there is insufficient or no pressure at low pressure.	1. The low-pressure valve spring is damaged or has lost its elasticity	Replace the low-pressure valve spring
	2. The low-pressure valve has slight wear and tear	Correct the valve mouth
4. The oil pump supply is interrupted and produces weak noise.	1. Low oil level, absorbing air	Fill the oil and increase the oil level
	2. Inlet blockage	Remove impurities from the suction port
	3. The vent valve is closed, and the air pressure inside the oil storage pipe decreases	Open the vent valve
5. The plunger and pressure rod automatically rebound.	1. The valve mouth of the one-way valve has slight wear and tear	Correct the valve mouth
	2. The one-way valve spring loses its elasticity or is damaged	Replace the one-way valve spring
	3. Particle impurities at the valve mouth of the one-way valve	Clean the one-way valve area
6. When using static pressure, there is a slow decrease in pressure.	Failure of each sealing point	Check all seals, tighten screws or replace rubber rings
7. There is a phenomenon of compressed air.	Insufficient exhaust	Pump the abdomen upwards several times to eliminate it