AC 923813

Frequently Asked Questions

Q: What electric lift truck equipment does the AC 923813 quad ring fit?
A: The AC 923813 quad ring is used in hydraulic and pneumatic sealing applications on electric lift trucks and electric pallet jacks from Crown, Toyota, Raymond, Yale, Hyster, Jungheinrich, Linde, CAT, Mitsubishi, and BT. Quad rings provide advanced sealing in dynamic cylinder rod applications and rotary shaft applications. Confirm your equipment model and cylinder type to ensure correct fitment.

Q: What material composition does the AC 923813 quad ring have?
A: The AC 923813 is manufactured from rubber or equivalent elastomer material such as nitrile (NBR) or fluorocarbon (FKM) depending on hydraulic fluid compatibility requirements. The elastomer formulation resists compression set, maintains elasticity under pressure cycling, and provides superior sealing performance compared to standard o-rings. Material selection ensures compatibility with mineral oil hydraulic fluids and industrial environments.

Q: What are the dimensions and specifications for the AC 923813?
A: The AC 923813 quad ring includes inner diameter, outer diameter, cross-section dimensions, and pressure rating specifications optimized for dynamic sealing applications. Quad ring geometry features four sealing surfaces compared to two on standard o-rings, improving performance in rod seal and rotary applications. Exact dimensional matching is essential for proper cavity fit and pressure retention.

Q: Why use a quad ring instead of a standard o-ring for the AC 923813 application?
A: Quad rings provide superior sealing performance in dynamic cylinder rod and rotary shaft applications due to four sealing surfaces. The quad geometry reduces extrusion risk at high pressures, minimizes internal leakage during rod movement, and extends seal life compared to standard o-rings. Quad rings maintain sealing integrity in repetitive cycling common to electric lift truck hydraulic systems.

Q: What is the expected service life of the AC 923813 quad ring?
A: Service life depends on system pressure, rod speed, hydraulic fluid type, and equipment usage cycles. Under normal electric lift truck operating conditions, elastomer quad rings typically perform reliably for 3 to 6 years before requiring replacement. High-pressure systems, continuous operation, or extreme temperature exposure may require more frequent replacement intervals.

Q: How do I identify if the AC 923813 quad ring needs replacement?
A: Replace this quad ring if you observe external hydraulic leakage at the rod seal area, reduced system pressure, sluggish cylinder performance, visible deterioration or cracking of the elastomer, or loss of elasticity when inspected. A failing quad ring cannot maintain adequate sealing under pressure and will result in internal or external fluid loss affecting lift truck performance.