Please send us the old seals, the cylinder drawings, and the location of the oil leak so we can review the materials, grooves, and overall fit together to determine whether to repair, replace, or customize the part.
Chengxin integrates material supply, sealing components, and machining resources. From oil leak locations and wear on old parts to groove dimensions, we organize existing data into specifications suitable for discussion and price quotes, and then coordinate replacement, prototyping, and supply.
Carefully verify each item—including oil leaks, material selection, dimensions, and overall assembly compatibility—to ensure that maintenance and procurement proceed smoothly.
Starting with external leaks at the rod end, oil seepage at cylinder joints, or abnormal pressure retention, compare the wear on the old parts with the on-site operating conditions to determine which seals should be inspected first.
Check the type, temperature, pressure, and duration of use of the fluid, identify the cause of swelling, hardening, or loss of elasticity, and then adjust the material orientation accordingly.
Consider the shaft diameter, bore diameter, groove width and depth, and the sealing cross-section together. When parts are worn or part numbers are unclear, start by comparing them using drawings, measurements, and photographs.
Piston seals, piston rod seals, dust seals, guide components, and anti-extrusion rings each serve a specific purpose; determine which components need to be replaced based on the actual design.
Speed, stroke, lateral load, the condition of the rod surface, and external contamination conditions can all affect the seal fit; be sure to verify all of these factors when selecting a seal.
Confirm the required quantity, delivery date, drawing version, and documentation in advance. For custom parts, agree on the sample testing and acceptance procedures to facilitate subsequent procurement.
From primary seals to secondary supports, first determine where this part is installed and what its function is, then verify the material and dimensions.
The orientation can be identified from the photo first; the final model selection will then be confirmed based on the drawings, cross-sections, and operating conditions.
Since pistons and piston rods are used in different applications, first confirm the sealing cross-section, the direction of pressure, and the groove, and then select the appropriate materials and dimensions.
Send photos of the installation location and the old parts →When support is required for the seal, determine whether an anti-extrusion ring is needed based on the pressure, clearance, and installation location.
Let's check the clearance and pressure together →
For fixed joint locations such as cylinder heads and end caps, confirm the O-ring or other cross-sectional profile based on the original design, and select them separately from the reciprocating seals.
Verify the joint locations and dimensions →
If existing specifications are difficult to identify, please provide the original part or drawings so we can determine the required matching components for sealing, dust protection, and guidance.
Send a screenshot to confirm the direction of the package →Product images are for illustrative purposes only; the actual cross-section, materials, dimensions, and contents of the complete set are subject to the confirmed specifications.
You can submit the remaining information in stages; please start by providing the drawings, old parts, or photos you currently have on hand.
Fluid name, normal and maximum temperatures, operating and peak pressures, and the timing of any abnormalities.
Rod diameter, bore diameter, groove width and depth, seal cross-section, speed, and stroke; please also provide the equipment part number if available.
Quantity required, whether the unit is for repair or a new unit, delivery time, sample testing methods, and any required documentation.
By considering the equipment, the location of the oil leak, and the operating conditions together, it becomes easier to explain the problem clearly.
During earthwork operations, both the sand and dust adhering to the boom surface and the lateral loads must be taken into account.
Mud, dust, and intermittent operating conditions can affect the selection and maintenance of seals.
If you notice oil stains on the rod end, please first provide close-up photos of the leak location and photos of the removed old part.
The equipment images are illustrative of application scenarios and do not depict specific customer cases or actual photos of malfunctions.
FTIR material comparison, along with dimensional and visual inspections and material documentation, ensures that the hydraulic seals you receive are verifiable and traceable, making it easier to integrate them into your internal quality control processes.
Material certification and compliance documentation are provided based on manufacturer or third-party documents; the specific documents available will be determined based on the selected materials and product requirements.
Incoming materials undergo FTIR material verification, and their dimensions and appearance are checked simultaneously to ensure that the materials, specifications, and actual delivery match.
The following outlines approaches to addressing common issues; actual improvement results will be determined based on equipment inspections and testing.
First, check the sealing location and the cross-section of the old part, then compare the rod diameter, cylinder bore, and groove dimensions.
Compile the information on when oil leaks occur, the type of oil, temperature and pressure, and photos of wear, and use it to verify the materials and mating conditions.
Review the drawings to identify all sealing locations and confirm the quantity, materials, fabrication requirements, and acceptance procedures.
Old parts, photos, dimensions, part numbers, or operating conditions—any of these will work. Please send us the information you have first, and we’ll work together to organize it into a format we can use.
