252101780 split flange for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Part Number：252101780
Product Name：Split Flange
Applicable Model：XCMG ZL50G, ZL50GL Wheel Loader
Material：High strength carbon steel, surface anti-corrosion treatment
Rated working pressure：OEM standard working pressure
Sealing form：Rubber O-ring sealing
Medium：L-HM46 anti-wear hydraulic oil
Working temperature：-20℃ ~ 80℃, suitable for all-season outdoor construction
Structure：Two-piece split combined flange
Connection form：Bolt locking and fastening, matched with standard hydraulic oil ports
Inspection Items：Sealing test, dimensional inspection, hardness test, appearance flaw inspection

Application Scenarios

It is used for high-pressure pipeline connection of gear pumps, multi-way valves and hydraulic hoses of 5-ton wheel loaders, suitable for earthwork, quarry mining, sand yard and bulk cargo loading high-intensity working conditions.

• Manufactured strictly according to OEM standards, the size and hole spacing fully match the original assembly, direct installation saves maintenance time, no extra modification, cutting or hole reaming required on site, greatly lowering the risk of assembly errors.
• Split two-piece design, easy to assemble and disassemble, convenient for on-site maintenance in narrow installation space; no need to remove adjacent heavy hydraulic components, shorten equipment downtime and improve work efficiency.
• Precision machined sealing groove, uniform compression on O-ring, stable sealing and low leakage risk; the groove contour is optimized to prevent the sealing ring from being pinched, sheared or over-squeezed under fluctuating hydraulic pressure.
• High-strength carbon steel material, good rigidity, not easy to deform under high pressure and vibration, has strong resistance to fatigue from repeated pressure shocks generated during loader cyclic operations.
• Anti-corrosion surface treatment, resistant to mud splash, sand abrasion and rust, adapt to harsh outdoor construction environment, suitable for long-term use in rainy, dusty and humid working sites.

FAQ 

Q1: Can this split flange be used on hydraulic circuits exceeding its rated pressure?
A1: No. Exceeding rated pressure will cause flange deformation, O-ring extrusion failure, oil leakage or even sudden oil spray, which brings safety risks. Long-time overpressure operation will also cause irreversible fatigue damage to the flange base material, and the hidden danger will still exist even after returning to normal pressure.

Q2: What are the common causes of oil leakage at the split flange?
A2: It may be loose locking bolts, aging or damaged O-ring, dirt and metal debris trapped in the sealing groove, flange deformation caused by external collision, or uneven bolt tightening force on both sides of the split flange.

Q3: What should be noticed before installation?
A3: Clean the sealing surface and sealing groove to remove impurities, burrs and residual old seal fragments; check that the O-ring is intact, free of cuts and hardening; tighten the locking bolts alternately and evenly step by step to avoid uneven compression of the sealing assembly.

Q4: Can a deformed split flange continue to be used after correction?
A4: It is not recommended. Flange deformation will lead to uneven sealing pressure, which is prone to repeated leakage under pressure. Even after manual correction, internal residual stress still exists, and it will deform again under hydraulic shock load, better to replace the new flange directly.

Q5: What are the requirements for the hydraulic oil used with this flange?
A5: It is recommended to use L-HM46 anti-wear hydraulic oil. Dirty and deteriorated oil contains hard particles, which will scratch the sealing surface and cut the O-ring. Oil mixed with water will also accelerate the rust of the flange and corrode the rubber seal.

Q6: What will happen if the flange bolts are tightened unevenly?
A6: Uneven tightening will tilt the split flange, cause partial over-compression of the sealing ring, and the other side is not sealed tightly, leading to continuous oil leakage. Severe over-tightening may also crack the flange body.