| Parameter | Specification |
|---|---|
| COGENG Part Number | 991/00145 (991-00145 / 99100145) |
| OEM Equivalent | JCB 991/00145, JCB 991-00145, JCB 99100145 |
| Product Type | Hydraulic Cylinder Seal Kit |
| Application | Boom, Bucket, Arm, Stabilizer, Steering cylinders |
| Kit Type | Complete overhaul seal kit |
| Compatible Models | Multiple JCB excavator, backhoe loader, and telehandler models |
| Brand | Part Number |
|---|---|
| COGENG | 991/00145, 991-00145, 99100145 |
| JCB | 991/00145, 991-00145, 99100145 |
| Interchange | 991/00146, 991/00147, 991/00148, 991/10142, 991/00012 |
| Component | Material Grade | Hardness | Temperature Range |
|---|---|---|---|
| Piston Seals | Polyurethane (PU) | 90-92 Shore A | -35°C to +110°C |
| Rod Seals | NBR + PTFE coating | 85 Shore A | -40°C to +120°C |
| Wiper Seals | Polyurethane (PU) | 88-90 Shore A | -35°C to +100°C |
| O-Rings | HNBR (Zetpol) | 70 Shore A | -40°C to +150°C |
| Wear Rings | PTFE + Bronze filler | — | -50°C to +200°C |
| Backup Rings | Nylon 66 (Glass filled) | — | -40°C to +120°C |
| Buffer Seals | Polyurethane | 90 Shore A | -35°C to +110°C |
| 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 |
Q: What JCB models use the 991/00145 hydraulic cylinder seal kit?
A: The 991/00145 (also referenced as 991-00145 or 99100145) is a premium hydraulic cylinder seal kit commonly used across multiple JCB backhoe loader and excavator models, particularly for boom, dipper, and stabilizer cylinder applications. Always verify the part number against your machine's parts manual or the cylinder's specific seal kit reference before ordering.
Q: What are the symptoms of failing hydraulic cylinder seals?
A: Common signs include visible hydraulic oil leaking from the cylinder rod or gland area, decreased lifting or digging force, cylinder drift where the implement slowly lowers under load, jerky or erratic cylinder movement, and external oil contamination around the cylinder assembly. Ignoring these symptoms can lead to internal cylinder scoring and more costly repairs.
Q: What is included in the 991/00145 seal kit?
A: A complete seal kit typically includes piston seals, rod seals, wiper seals, O-rings, backup rings, and gland seals necessary for a full cylinder overhaul. COGENG kits are manufactured to meet or exceed OEM material specifications for abrasion resistance, temperature tolerance, and service life.
Contact COGENG
📞 Phone: +86-185-2913-1515 🌐 Instagram
📧 Email: hugo@cogeng.net 🌐 Facebook：Excavator Parts Selection and Replacement Community
💬 WhatsApp +86-185-2913-1515 Facebook: Excavator Wiring Harness
💬 WeChat: +86-185-7865-1106 Facebook: Excavator Wire Harness
🌐 Website: cogeng.net Facebook: Excavator SolenoidValve
#ExcavatorWiringHarness #ExcavatorThrottleMotor #ExcavatorSolenoidValve #ExcavatorSealKit
