803044358 supporting ring for XCMG ZL50G/ZL50GL Wheel Loader

product parameters

Product Name: Support Ring
Part No.: 803044358
Applicable Model: XCMG ZL50G, ZL50GL Wheel Loader
Material: Wear-resistant self-lubricating composite engineering material
Function: Radial support, guidance, side load bearing and anti-eccentric wear for cylinder piston
Installation Position: Grooves of piston and guide sleeve on boom cylinder and bucket cylinder
Medium: Construction machinery hydraulic oil
Working Temperature: -30℃ ~ +120℃
Inspection Items: Dimension tolerance inspection, visual inspection, compression deformation test
Matching Parts: Seal ring, dust seal, O-ring, guide strip

Applicable Scenarios

It is installed inside boom cylinder and bucket cylinder of loader to bear lateral impact force generated during shoveling, lifting and unloading. Widely used in heavy-duty scenarios with high impact load, such as mines, sand yards, earthwork construction sites and cargo yards.

• Original specification with precise tolerance, easy installation and perfect groove fit
• Self-lubricating material with low friction, reduce scratch risk of cylinder inner wall
• Good extrusion resistance and toughness, withstand alternating side impact, not easy to crack
• Stable oil and temperature resistance, not easy to swell or harden in hydraulic oil
• Moderate hardness, act as isolation layer without abrading metal cylinder
• Ideal matching part for cylinder overhaul, reduce repeated disassembly work

FAQ 

Q：What faults will be caused by worn support ring?
A：Worn support ring loses guiding support, the piston swings eccentrically and scratches cylinder wall, accompanied by increased internal leakage, weak lifting, jitter and abnormal noise.

Q：Can I replace the support ring separately or replace all seals together?
A：Separate replacement is allowed. It is recommended to replace all seals and dust seals together during overhaul to avoid secondary disassembly.

Q：What should be noticed during installation?
A：Remove burrs and dirt in grooves, avoid sharp edges cutting the ring. Some material can be preheated with warm water for flexibility. Forcible prying is forbidden.

Q：Are support ring and guide strip interchangeable?
A：They have similar functions, but different cross-section, load design and groove size. They are not interchangeable, which will lead to insufficient support or jamming.

Q：What causes the support ring to crack?
A：Long-term overloaded eccentric impact, hard impurities in hydraulic oil, improper assembly clearance and material aging embrittlement are common causes.

Q：What are the storage requirements for spare support rings?
A：Store in cool, ventilated and dark place away from heat source. Do not squeeze or bend to avoid permanent deformation, keep away from strong acid and alkali.