Product name: JCB Cylinder Seal Kit
Part No: 991/20024 991-20024 99120024
Size：30mm / 60mm
Model Number:For
Primary Applications: JCB 8008 Mini Excavator, JCB 8010 Mini Excavator, JCB 8012 Mini Excavator, JCB 8021 Mini Excavator, JCB 803 Mini Excavator, JCB 804 Mini Excavator, JCB 805 Mini Excavator
Typical Cylinder Applications: Boom Cylinders (Compact Models), Arm Cylinders (Compact Models), Bucket Cylinders (Compact Models), Auxiliary Circuit Cylinders, Attachment Cylinders
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-991/20024-MICRO |
"MICRO" denotes compact equipment application |
| Replaces OEM Part No. |
991/20024, 991-20024, 99120024 |
Direct replacement for all listed part numbers |
| Rod Diameter |
30 mm (±0.08 mm) |
Precision-ground for exact rod seal fit |
| Bore Diameter |
60 mm (±0.12 mm) |
Accurate sizing for optimal piston seal performance |
| Primary Rod Seal |
NBR with reinforced design |
Enhanced durability for compact cylinder applications |
| Primary Piston Seal |
Polyurethane (PU) |
Superior wear resistance in limited space configurations |
| Wiper/Scraper |
Polyurethane (PU) |
Effective contaminant exclusion for smaller rod diameters |
| Wear Bands/Guide Rings |
PTFE-Impregnated Material |
Low friction, ideal for compact cylinder guidance |
| O-Rings |
Nitrile (NBR) |
Reliable static sealing in confined spaces |
| Temperature Range |
-30°C to +100°C (-22°F to +212°F) |
Suitable for compact equipment operating conditions |
| Pressure Rating |
Up to 30 MPa (4350 PSI) |
Optimized for smaller cylinder pressure requirements |
| Fluid Compatibility |
Mineral-based and synthetic hydraulic oils |
Compatible with standard compact equipment fluids |
Parts list
| NO |
Number |
Name |
Qty |
| 1 |
:332/G4335 |
Kit service end cap |
1 |
| 2 |
:590/40066 |
Rod piston, 30mm |
1 |
| 2A |
::809/00104 |
Bush grooved, 40mm long |
1 |
| 3 |
:595/ 10032 |
Piston head |
1 |
| 4 |
:826/01182 |
Dowel |
1 |
| 7 |
:553/70202 |
Cylinder 60mm bore |
1 |
| 7A |
::809/00104 |
Bush grooved, 40mm long |
1 |
| 9 |
:1450/0001 |
Nipple Grease, Straight 1/8 BSP |
2 |
| 50 |
:991/20024 |
Kit Seals |
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...
