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 & leather cup repair kit is specially developed for MSB hydraulic breakers MS30AT, MS35AT, MS700, MS800, widely matched on small to medium excavator rock hammers for demolition, mining and road construction. The package includes complete accumulator rubber diaphragm, hydraulic leather cup, O-rings, dust seals, gaskets and backup rings for full breaker overhaul maintenance.
Adopted imported high-performance HNBR & FKM fluororubber composite material, the kit owns outstanding oil resistance, high pressure resistance, tear resistance and low temperature aging resistance. It perfectly replaces original MSB OEM sealing parts, thoroughly solves common faults like accumulator pressure loss, internal oil leakage, hammer power drop and frequent diaphragm rupture, greatly extend breaker service life under long-term heavy impact working conditions.
Item |
Detailed Parameter |
Product Name |
MSB MS30AT/MS35AT/MS700/MS800 Hydraulic Breaker Diaphragm & Cup Seal Kit |
Applicable Model |
MS30AT, MS35AT, MS700, MS800 Hydraulic Rock Breaker |
Compatible Series |
MSB AT & MSB Medium-large Hydraulic Breaker Series |
Main Material |
Imported HNBR + FKM Fluororubber + Reinforced Nylon Backup Ring + Wear-resistant Leather Cup |
Max Working Pressure |
130MPa |
Working Temperature |
-35°C ~ 135°C |
Kit Contents |
Accumulator diaphragm, hydraulic leather cup, shaft dust seals, O-rings, cylinder gaskets, PTFE backup rings, full overhaul sealing accessories |
Cross Reference OEM No. |
MSB-MS30AT, MSB-MS35AT, MSB-MS700, MSB-MS800 |
Net Weight |
Approximately 1.2kg |
Applicable System |
Hydraulic breaker nitrogen accumulator system & main cylinder sealing system |
Warranty |
12 Months |
Fully matched with original MSB MS30AT/MS35AT/MS700/MS800 hydraulic breakers, consistent with OEM part numbers. Standard molding size without trimming or modification, direct disassembly & installation, zero assembly gap.
Core diaphragm and leather cup adopt high-strength HNBR fluororubber composite formula, added anti-tear fiber layer. Excellent hydraulic oil corrosion resistance, anti-aging, anti-extrusion, stable performance under -35°C to 135°C extreme temperature environment, not easy to crack or deform under frequent impact.
All sealing components pass 130MPa ultra-high pressure impact cycle test. Effectively lock accumulator nitrogen pressure, eliminate internal & external oil leakage, avoid breaker striking force attenuation, keep consistent hammer impact power during continuous construction.
Covers all sealing spare parts required for accumulator and main cylinder full maintenance of MS30AT/MS35AT/MS700/MS800 breakers. One set meets full machine repair demand, reduce separate parts procurement time and equipment downtime cost.
Every seal kit undergoes air tightness, high-frequency impact aging, hydraulic oil soaking durability tests before delivery, fully reaches OEM production standards, stable and reliable long-term mining & construction heavy load performance.
Suitable for MSB MS30AT, MS35AT, MS700, MS800 hydraulic rock breakers installed on multiple engineering equipment: • Mini & medium excavators (1–25 ton diggers, Sany, XCMG, Liugong, Sunward, Lovol) • Road demolition machinery • Quarry & mine rock crushing equipment • Municipal renovation & concrete breaking construction • Mobile hydraulic crushing stations • Heavy-duty impact engineering 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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