33-99No. Mufu E Rd. Gulou District, Nanjing, China [email protected] | [email protected]
33-99No. Mufu E Rd. Gulou District, Nanjing, China [email protected] | [email protected]
This heavy-duty accumulator diaphragm & piston cup repair kit is specially developed for JAB RB38 / RB48 / RB68 hydraulic rock breakers, widely matched on mini & medium excavator demolition hammers. The package contains complete energy storage diaphragm, piston cup, matching O-rings, gaskets and backup sealing rings for full accumulator overhaul.
Adopted imported reinforced HNBR and FKM fluororubber composite material, the kit delivers outstanding oil resistance, anti-fatigue performance, high-frequency impact resistance and wide temperature adaptability. It perfectly replaces original JAB rubber parts, solves typical faults including nitrogen leakage, insufficient impact force, breaker power attenuation and overheating, and greatly extends the service life of the breaker under long-term stone crushing, demolition heavy-load working conditions.
Item |
Detailed Parameter |
Product Name |
JAB RB38/RB48/RB68 Hydraulic Breaker Diaphragm & Piston Cup Kit |
Applicable Model |
RB38 / RB48 / RB68 JAB Hydraulic Rock Breaker |
Compatible Series |
JAB RB Series Medium Hydraulic Breaker |
Main Material |
Imported Reinforced HNBR + FKM Fluororubber + Fabric Reinforced Layer |
Max Working Pressure |
130MPa |
Working Temperature |
-35°C ~ 130°C |
Kit Contents |
Accumulator diaphragm, piston cup, O-rings, sealing gaskets, anti-extrusion backup rings, full overhaul rubber accessories |
Cross Reference OEM No. |
JAB-RB38, JAB-RB48, JAB-RB68, 3088621, 3088622, 3088623 |
Net Weight |
Approximately 1.1kg |
Applicable System |
Breaker nitrogen accumulator energy storage system |
Warranty |
12 Months |
1. 100% Exact OEM Replacement. Fully dimensional matched with original JAB RB38/RB48/RB68 breaker accumulator parts, consistent with OEM part numbers JAB-RB38, JAB-RB48, JAB-RB68, 3088621/3088622/3088623. Direct installation without cutting, grinding or modification.
2. Premium Reinforced Composite Sealing Material.Core diaphragm and piston cup adopt fabric-reinforced HNBR & FKM dual composite process, anti-aging, hydraulic oil corrosion resistant, ultra-high tear resistance, stable elastic recovery under -35°C to 130°C complex working environment.
3. Zero Nitrogen Leakage & Stable Impact Output.All rubber parts pass 130MPa ultra-high pressure fatigue impact test, effectively isolate hydraulic oil and nitrogen chamber, eliminate internal air leakage and pressure loss, maintain consistent breaker impact frequency and breaking force, avoid equipment power drop and oil temperature rise.
4. Complete All-in-One Overhaul Kit.Integrates all rubber sealing accessories required for accumulator full maintenance. One set meets all repair demands, shortens on-site maintenance time and lowers equipment operation & parts replacement cost.
5. Strict Factory Quality Control.Every diaphragm & piston cup kit undergoes air tightness, high-frequency impact fatigue and high-low temperature aging tests before delivery, fully meets OEM manufacturing standards, ensures long-term stable operation in harsh construction sites.
6. Wide Application Scope. Suitable for JAB RB38/RB48/RB68 hydraulic rock breakers equipped on multiple heavy-duty construction equipment:
• 6–18 ton medium excavators (Sany, Liugong, Sunward, Lovol, XCMG) • Mobile demolition hydraulic hammers • Quarry stone crushing machinery • Road demolition & municipal construction equipment • Hydraulic breaker nitrogen accumulator energy storage system • Heavy-duty impact mobile construction machinery
Welcome to HOVOO, a Chinese seal factory. Production of PU, Rubber and PTFE seals. The seals include O-ring, piston seal, rod seal, Gray ring and gas seal.
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