Product name: JCB Bucket Cylinder Seal Kit
Part No: 550/42835 550-42835 55042835
Size：40MM / 70MM
rModel Number:For 3DXHM 3DXL RCP 3DX 3DX SUPER 4DX 3DX ED 3DXL
Material:Lron+Rubber
Packing:PP bag inside, carton box outside
Payment Terms:Western Union, L/C, T/T, MoneyGram, D/A, D/P
MOQ:Acceptable trial order
Shipping Mode:By air, by sea, by express(Fedex, UPS, DHL, TNT, etc.)
Place of Origin:Guangdong, China
Brand name:COGENG
CertifiCATEEion:ISO9001
Supply :500PCS
| Parameter |
Specification |
Application Details |
| COGENG Part Number |
COGENG-550/42835-BKT |
"BKT" denotes Bucket Cylinder specific application |
| Replaces OEM Part No. |
JCB 550/42835 |
Direct OEM replacement |
| Primary Rod Seal |
Multi-lip NBR with PTFE reinforcement |
Handles high-pressure cycling and shock loads |
| Piston Seal System |
Polyurethane composite with anti-extrusion ring |
Resists extrusion under heavy digging loads |
| Wiper/Scraper |
Heavy-duty Polyurethane double lip |
Effective exclusion of abrasive contaminants in digging applications |
| Wear Bands/Guide Rings |
Reinforced PTFE-Nylon composite |
Withstands side loads and prevents metal-to-metal contact |
| Static Seals |
High-grade Nitrile (NBR) |
Reliable sealing for gland and piston applications |
| Temperature Range |
-30°C to +100°C (-22°F to +212°F) |
Suitable for all-season operation |
| Pressure Rating |
Up to 42 MPa (6000 PSI) |
Meets JCB bucket cylinder hydraulic system requirements |
| Fluid Compatibility |
Mineral-based and synthetic hydraulic oils |
Compatible with JDB J20C and similar specifications |
Parts list
| NO |
Number |
Name |
Qty |
| A |
40/303543 |
Ram Shovel, Assembly |
1 |
| 1 |
550/42831 |
Tube Ram Bucket |
1 |
| 2 |
550/42391 |
Piston rod S/A |
1 |
| 3 |
550/42392 |
Piston |
1 |
| 4 |
550/42832 |
Head End Cover |
1 |
| 5 |
550/40875 |
Nut Piston rod |
1 |
| 6 |
550/41135 |
Nipple Grease |
1 |
| 7 |
550/40895 |
Grease Nipple |
1 |
| 8 |
550/42835 |
Seal Kit |
1 |
Critical Safety Precautions:
Completely depressurize hydraulic system
Secure machine on level ground with bucket lowered
Support cylinder properly during disassembly
Wear appropriate PPE including safety glasses and gloves
Installation Procedure:
Preparation Phase
Thoroughly clean cylinder exterior and connections
Gather all required tools and create clean workspace
Verify kit contents against component checklist
Disassembly Process
Mark orientation of gland and piston components
Document seal positions and directions with photographs
Carefully remove old seals without damaging sealing surfaces
Component Inspection
Examine rod surface for scratches or pitting
Check cylinder bore for scoring or wear
Inspect gland and piston for damage
Verify all components are clean before reassembly
Seal Installation
Lubricate all new seals with clean hydraulic fluid
Use seal installation tools to prevent damage
Ensure proper orientation of directional seals
Verify all seals seat completely in their grooves
Reassembly & Testing
Reassemble components in reverse order of disassembly
Torque fasteners to manufacturer specifications
Cycle cylinder slowly to distribute fluid
Check for leaks and monitor bucket operation
Frequently Asked Questions
