252300477 multi-way valve inlet steel pipe for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Product Name: Multi-way Valve Inlet Steel Pipe
Part No.: 252300477 (Drawing No. ZJ6G.7.4.2)
Applicable Model: XCMG ZL50G, ZL50GL Wheel Loader
Material: Seamless carbon steel pipe
Surface Treatment: Yellow anti-rust paint
Connection Type: Welded flange on both ends
Transmission Medium: Construction machinery L-HM46 hydraulic oil
Applicable Circuit: High-pressure inlet circuit from main pump to multi-way valve
Working Temperature: -20℃ ~ +100℃
Inspection Items: Visual flaw detection, bore inspection, high-pressure sealing test

Applicable Scenarios

Installed between the main hydraulic pump and working multi-way valve of loader, supplying oil for main working circuit to support boom lifting and bucket movement. Widely used in long continuous heavy-duty scenarios such as mines, sand yards, construction sites and cargo yards.

• Original bending forming, flange holes and pipeline layout match original machine precisely for easy alignment
• Seamless steel pipe substrate with high rigidity, resistant to pressure pulse, longer service life than hydraulic hose
• Integrated flange welding, high weld strength, stable pressure bearing and low leakage risk
• Smooth inner wall with small pressure loss, ensure sufficient oil supply and powerful movement
• Anti-rust painting, resist muddy water and dust corrosion on construction sites
• Pressure test and flaw inspection for each pipe to eliminate trachoma and cold weld defects
• Main inlet hard pipe assembly compatible with original seals, convenient replacement and less downtime

FAQ 

Q：What causes oil leakage at the flange of multi-way valve inlet pipe?
A：It is usually caused by damaged gasket, impurities on flange surface or uneven bolt tightening. If weld cracks occur, replace the whole pipe directly, on-site welding repair is not recommended.

Q：Can this inlet pipe be replaced by hydraulic hose?
A：Replacement with hose is not recommended. This is the main high-pressure inlet with heavy pressure pulse. Hoses will age and burst quickly here and bring safety risks.

Q：Can the pipe continue to be used if it becomes thin due to rust?
A：Light surface rust can be polished and repainted. If the wall is thinned with rust pits and strength drops, it may burst under high pressure and must be replaced immediately.

Q：What should be noticed when disassembling and installing this pipe?
A：Release system pressure and drain residual oil before disassembly. Clean flange surface, place gasket flat and tighten bolts diagonally step by step to prevent leakage.

Q：What is the influence of dent on the bending part?
A：Dents reduce flow area, cause throttling and power loss, resulting in weak lifting. Severely dented pipes need replacement.

Q：What should be noticed for storage?
A：Store in dry and ventilated warehouse, protect flange surface from impact, seal pipe ends to prevent sediment from entering and jamming the valve.