252100878 hose assembly for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Part Number：252100878
Product Name：Hose Assembly
Applicable Model：XCMG ZL50G, ZL50GL Wheel Loader
Material：Oil-resistant synthetic rubber inner tube, steel wire reinforcement layer, carbon steel crimping fitting
Rated working pressure：OEM standard working pressure, stable pressure bearing
Burst pressure：Design safety burst pressure, with high safety margin
Medium：L-HM46 anti-wear hydraulic oil
Working temperature：-20℃ ~ 80℃, suitable for all-season outdoor construction
Structure：Multi-layer steel wire reinforced hydraulic rubber hose, double-end finished fittings
Connection form：Thread connection, matched with standard hydraulic oil ports
Inspection Items：Pressure burst test, impulse fatigue test, leakage test, dimension inspection, appearance flaw inspection

Application Scenarios

It is used for hydraulic oil transmission connection of hydraulic pumps, multi-way valves and boom/bucket cylinders 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 hose length, joint type and thread size fully match the original assembly, plug and play, saving maintenance time.
• Multi-layer steel wire reinforcement design, high pressure resistance, good pulse fatigue resistance, not easy to burst under frequent pressure fluctuation.
integrated crimping process, tight combination of hose and fitting, effectively preventing oil leakage and head separation.
• Wear-resistant and anti-aging outer rubber, resistant to mud, sand friction and outdoor sunlight aging, long service life.
• Good flexibility, can absorb the vibration offset between hydraulic components, reduce additional stress on joints.
• Good compatibility, matched with standard hydraulic oil, not easy to react with qualified anti-wear hydraulic oil.
• Strict factory pressure and impulse test, stable performance, good interchangeability and reliable after-sales maintenance.

FAQ 

Q1: Can this hose assembly be replaced with a hose of different pressure grade directly?
A1: No. Hoses with lower pressure rating cannot bear the system peak pressure, which may cause sudden burst and oil spray, bringing major safety hazards.

Q2: What are the common causes of oil leakage at the hose joint?
A2: It may be insufficient crimping, damaged sealing ring, thread slipping, excessive bending of the hose, or long-term fatigue cracking at the root of the fitting, which needs step-by-step inspection.

Q3: What should be noticed before installation?
A3: Clean the oil ports to prevent sand and impurities entering the hydraulic circuit; avoid twisting the hose during installation; keep the bending radius larger than the minimum requirement; tighten the threaded joints evenly.

Q4: Can the leaking part of the hose be wrapped and repaired for reuse?
A4: It is not recommended. Winding, gluing or simple clamping cannot restore the original pressure resistance, it may burst suddenly under pressure, replace the whole hose assembly directly.

Q5: What are the requirements for the hydraulic oil used with this hose?
A5: It is recommended to use L-HM46 anti-wear hydraulic oil. Dirty, deteriorated or mixed-water oil will accelerate rubber swelling and inner layer damage.

Q6: What will happen if the hose is installed with too small bending radius or twisted?
A6: Too small bending radius or twisting will damage the internal steel wire structure, cause local stress concentration, accelerate fatigue damage and shorten service life greatly.

Q7: How to maintain the hose assembly in daily use?
A7: Regularly check for surface cracks, blisters, oil seepage and loose joints; avoid long-term contact with sharp edges; replace in time when reaching service life.