Product name: JCB Cylinder Seal Kit
Part No: 991/00145 991-00145 99100145
Size：50mm / 90mm
Model Number:For 3CX 4CX 5CX
Extended Compatibility:406 407 408 413 417 419
Typical Cylinder Applications: Boom Cylinders, Dipper Cylinders, Bucket Cylinders, Stabilizer/Leg Cylinders, Auxiliary Hydraulic Circuits
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 |
Technical Details |
| COGENG Part Number |
COGENG-991-00145-JCB |
Quality-assured replacement solution |
| Replaces OEM Part No. |
JCB 991-00145 |
Direct OEM replacement |
| Primary Rod Seal |
Multi-lip NBR with PTFE enhancement |
Superior high-pressure sealing capability |
| Piston Seal System |
Polyurethane composite |
Excellent wear and extrusion resistance |
| Wiper/Scraper |
Double-lipped Polyurethane |
Maximum contaminant exclusion |
| Wear Bands/Guide Rings |
PTFE-Filled Nylon |
Low friction, high wear resistance |
| Static Seals |
High-grade Nitrile (NBR) |
Reliable performance in all sealing applications |
| Backup Rings |
Engineering-grade thermoplastic |
Prevents seal extrusion under high pressure |
| Temperature Range |
-35C to +110C (-31F to +230F) |
Wide operating temperature range |
| Pressure Rating |
Up to 40 MPa (5800 PSI) |
Meets JCB hydraulic system requirements |
| Fluid Compatibility |
Mineral-based, synthetic, and biodegradable hydraulic oils |
Broad fluid compatibility |
Parts list
| NO |
Number |
Name |
Qty |
| A |
559/60209 |
Ram assembly,lift |
1 |
| 1 |
:559/70209 |
Cylinder lift ram |
1 |
| 1A |
**** |
None serviced part |
1 |
| 1B |
**** |
None serviced part |
1 |
| 2 |
:590/40671 |
Rod Piston,assembly |
1 |
| 2A |
::809/00126 |
Bearing Liner 50-60-40 |
2 |
| 2B |
::813/00426 |
Seal Pivot Pin 50X60X5 |
2 |
| 3 |
:594/ 14289 |
Kit-end cap assembly |
1 |
| 3A |
**** |
None serviced part |
1 |
| 4 |
:595/ 10040 |
Piston head |
1 |
| 5 |
:991/00145 |
Kit-seal ram assembly |
1 |
| 6 |
:1450/0001 |
Nipple Grease, Straight 1/8 BSP |
1 |
| 7 |
:826/01179 |
Dowel |
1 |
Pre-Installation Checks:
Clean the cylinder exterior and work area thoroughly.
Compare old seals with new components to verify compatibility.
Inspect the rod, bore, and gland for scratches or wear. Polish minor imperfections with fine emery cloth.
Disassembly:
Mark the gland, piston, and tube for reassembly alignment.
Document seal order and orientation with photos.
Remove old seals carefully without damaging gland or piston grooves.
Seal Installation:
Lubricate all new seals and contact surfaces with clean hydraulic fluid.
Use soft-tipped tools or seal installation kits to avoid damaging seals.
Ensure seals are seated evenly in grooves without twists or rolls.
Reassembly & Testing:
Reassemble components in reverse order of disassembly.
Torque gland nuts and bolts to manufacturer specifications.
Cycle the cylinder slowly without load to seat the seals. Check for leaks and monitor fluid levels.
Frequently Asked QuestionsA. When will get the items after I place order?
Q. Once your payment is confirmed,we will arrange the goods within 1~4 days; if not in stock, we will inform you before placing the order?
A. If I only know the excavator model, but can not offer parts No.,what should I do ?
Q. If possible, you can send us pictures of old products, nameplate or the size for reference.
A. How can you guarantee the quality??
Q. We will 100% test the goods before delivery. We also support video inspection.
A. How long will it take to delivery to my address??
Q. The normal delivery time is 3-7 days, depending on which country you are in.?
A : Which delivery method will you choose?
Q : By sea, air or express(DHL,Fedex,TNT, UPS, EMS etc.)，Sometimes we will arrange as the customer's demand.
A: What's package? Can you give me the package according my requirement??
Q. We usually packed by standard exported box or carton. And yes we can pack as per your requirement.
A: Can the price be cheaper?
Q: Of course, you will be offered a good discount for a big amount.
A: Why should I choose to buy from you?
Q:Our advantages: 100% quality assurance, develop and manufature follow original ones;Quick response within 24 hours; Small order allowed;Reasonable stock and timely delivery;Neutral packing, customized packing are allowed. Positive customer feedback from abroad market;Excellent after-sales service.
A : Which payment terms can you accept?
Q : Paypal. Western Union, Bank Transfer, T/T...
