Product name: JCB Cylinder Seal Kit
Part No: 991/00103 991-00103 99100103
Size：50mm Rod / 90mm Bore
Model Number:For JCB 3CX 3CX Super, 3CX Eco, 3CX Pro, JCB 4CX 4CX Super, 4CX Eco, 4CX Pro, JCB 2CX 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 Notes |
| COGENG Part Number |
COGENG-991/00103-BH |
"BH" denotes Backhoe Loader application |
| Replaces OEM Part No. |
JCB 991/00103 |
Direct replacement |
| Rod Diameter |
50 mm (±0.12 mm) |
Precision-machined for perfect rod seal fit |
| Bore Diameter |
90 mm (±0.18 mm) |
Accurate sizing for optimal piston seal performance |
| Primary Rod Seal |
Multi-lip NBR with PTFE enhancement |
Provides superior high-pressure sealing capability |
| Primary Piston Seal |
Polyurethane (PU) composite |
Excellent extrusion resistance and durability |
| Wiper/Scraper |
Polyurethane (PU) |
Double-lipped design for maximum contaminant exclusion |
| Wear Bands/Guide Rings |
PTFE-Filled Nylon |
Low friction coefficient, prevents metal-to-metal contact |
| O-Rings & Back-up Rings |
Nitrile (NBR) |
High-quality static seals with excellent compression set resistance |
| Temperature Range |
-35°C to +110°C (-31°F to +230°F) |
Wide operating range for various climate conditions |
| Pressure Rating |
Up to 40 MPa (5800 PSI) |
Engineered for high-pressure backhoe applications |
| Fluid Compatibility |
Mineral oils, synthetics, and biodegradable fluids |
Compatible with JDB J20C and similar specifications |
Parts list
| NO |
Number |
Name |
Qty |
| 1 |
557/60005 |
Ram lift |
2 |
| 2 |
:557/70005 |
Cylinder |
1 |
| 3 |
**** |
Pipe |
1 |
| 4 |
::557/90005 |
Pipe |
1 |
| 5 |
:809/00112 |
Bearing liner 50mm pivot bore |
1 |
| 6 |
:813/00413 |
Seal 50mm internal dia. |
2 |
| 9 |
:594/ 14020 |
Kit-end cap 50mm rod x 90mm cyl |
1 |
| 10 |
:2411/0506 |
Seal 50mm rod |
1 |
| 11 |
:2411/8606 |
Seal wiper |
1 |
| 12 |
:2302/0310 |
O Ring |
1 |
| 13 |
:590/40103 |
Rod piston |
1 |
| 14 |
:595/27300 |
Head piston |
1 |
| 15 |
:826/01179 |
Dowel |
1 |
| 16 |
:2411/7918 |
Ring Wear |
1 |
| 17 |
:2411/ 1135 |
Seal piston |
1 |
| 18 |
991/00103 |
Kit-seal |
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...
