252101090 high pressure hose for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Part Number：252101090
Product Name：High Pressure Hose Assembly
Applicable Model：XCMG ZL50G, ZL50GL Wheel Loader
Material：Oil-resistant rubber inner tube, multi-layer steel wire reinforcement, wear-resistant outer rubber, steel crimping fitting
Rated working pressure：OEM standard working pressure
Burst pressure：Specified multiple of rated pressure
Medium：L-HM46 anti-wear hydraulic oil
Working temperature：-20℃ ~ 80℃, suitable for all-season outdoor construction
Connection form：Steel crimped joint, matched with split flange and hydraulic port
Inspection Items：Impulse test, burst pressure test, sealing test, dimensional inspection, pull-off test

Application Scenarios

It is used for high-pressure hydraulic oil transmission of tilt cylinder, boom cylinder and multi-way valve oil circuits on 5-ton wheel loaders, suitable for earthwork, quarry mining, sand yard and bulk cargo loading high-intensity working conditions.

• Advanced rubber compound formula, good oil resistance, aging resistance and weather resistance. The outer rubber layer withstands sand abrasion and mud corrosion, delivering stable performance in dusty and humid construction sites.
• Precision crimping process for end fittings. The compression force between fitting and hose is uniform, with high pull-out resistance, effectively preventing joint slipping and oil leakage under continuous machine vibration.
• Optimized minimum bending radius design, flexible layout in narrow installation space, reducing extra tension and shear stress applied to the hose during machine movement.
• Standardized interface design, compatible with original split flanges and hydraulic pipe fittings, easy for spare parts stocking and fast on-site replacement.
• Strict factory impulse and burst pressure sampling inspection. Each batch undergoes fatigue verification, with consistent quality and long service life under cyclic heavy-load operation.

FAQ 

Q1: Can this high pressure hose assembly work continuously above its rated working pressure?
A1: No. Long-time overpressure operation will cause irreversible expansion of the hose tube, loose steel wire layers, sharp drop of fatigue life, and there is a risk of sudden burst, which may lead to oil spray and safety accidents.

Q2: What are the common causes of oil leakage of the high pressure hose assembly?
A2: It may be wear and cracking of outer rubber, fatigue cracking near the crimping joint, aging of inner rubber, excessive bending during installation, or scratches from sharp rock debris cutting the hose body.

Q3: What should be noticed before installation?
A3: Check the hose surface for cracks, bulges and scratches; confirm the flow direction and installation path; reserve enough bending clearance, avoid forced stretching, twisting and sharp-angle bending during installation.

Q4: Can a slightly leaking hose be repaired and reused?
A4: It is not recommended. Local repair cannot restore the original pressure resistance and fatigue performance. Hidden damage inside the steel wire layer still exists, and burst failure is very likely to happen under pressure. It is safer to replace the whole hose assembly.

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 water-emulsified oil contains hard particles, which will abrade the inner rubber layer and accelerate rubber aging.

Q6: What will happen if the hose is installed with twisting force?
A6: Twisting will destroy the internal steel wire structure unevenly, lead to local stress concentration, speed up fatigue damage, and greatly shorten the service life of the hose.