Product name: JCB Backhoe Loaders Seal KitPart No:991/20028 991-20028 99120028 Size：50mm / 90mm Model Number:For 3CX 4CXMaterial:Lron+RubberPacking:PP bag inside, carton box outsidePayment Terms:Western Union, L/C, T/T, MoneyGram, D/A, D/PMOQ:Acceptable trial orderShipping Mode:By air, by sea, by express(Fedex, UPS, DHL, TNT, etc.)Place of Origin:Guangdong, ChinaBrand name:COGENGCertifiCATEEion:ISO9001Supply :500PCS
| Parameter |
Specification |
Application Details |
| COGENG Part Number |
COGENG-991/20028-BH |
"BH" denotes Backhoe Loader specific application |
| Replaces OEM Part No. |
JCB 991/20028 |
Direct OEM replacement |
| Primary Rod Seal |
Multi-lip NBR with PTFE reinforcement |
Handles high-pressure cycles and temperature variations |
| Piston Seal System |
Polyurethane composite with backup ring |
Resists extrusion under heavy loading conditions |
| Wiper/Scraper |
Double-lipped Polyurethane |
Effective contaminant exclusion in dirty environments |
| Wear Bands/Guide Rings |
PTFE-Filled Nylon |
Reduces friction 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 35 MPa (5000 PSI) |
Meets JCB backhoe loader hydraulic system requirements |
| Fluid Compatibility |
Mineral-based and synthetic hydraulic oils |
Compatible with JDB J20C and similar specifications |
Parts list
| NO |
Number |
Name |
Qty |
| 1 |
**** |
'See Remark'
332/H7041 End Cap Assembly |
1 |
| 2 |
:590/40858 |
Piston Rod Assy |
1 |
| 2A |
:1211/0021 |
Bush |
1 |
| 3 |
:595/27823 |
Head Piston |
1 |
| 4 |
:826/01184 |
Dowel retaining |
1 |
| 5 |
:2411/7940 |
Ring Wear |
2 |
| 6 |
:2411/ 1151 |
Seal |
1 |
| 7 |
:572/70047 |
Cylinder |
1 |
| 7A |
:809/00183 |
Bearing 2 .5" x 75 x 140 |
2 |
| 11 |
:1450/0001 |
Nipple Grease, Straight 1/8 BSP |
2 |
| 20 |
**** |
Paint Consumable Black |
1 |
| 42 |
:816/90502 |
Cap special Europower |
2 |
| 50 |
:991/20028 |
Kit-seal |
0 |
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...
