| Parameter | Specification |
|---|---|
| COGENG Part Number | 4649053 (Equivalent) |
| OEM Equivalent | 4649053 |
| Product Type | Hydraulic Cylinder Seal Kit |
| Application | Bucket Cylinder |
| Kit Type | Complete overhaul seal kit |
| Compatible Brands | John Deere, Caterpillar, Hitachi, Komatsu, and other heavy equipment |
| Brand | Part Number |
|---|---|
| COGENG | 4649053 (Equivalent) |
| John Deere | 4649053 |
| Caterpillar | 4649053 (Interchange) |
| Hitachi | 4649053 (Interchange) |
| Komatsu | 4649053 (Interchange) |
| Interchange | 4649054, 4649055, AT307757, AT307758 |
| 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 |
| Parameter | Rating |
|---|---|
| Maximum Pressure | 350 bar (5,075 psi) |
| Operating Temperature | -40°C to +120°C |
| Fluid Compatibility | Mineral oil, synthetic hydraulic fluids, biodegradable oils |
| Seal Speed Rating | Up to 0.5 m/s |
| Service Life | 5,000+ operating hours |
| Item | Description | Quantity | Material |
|---|---|---|---|
| 1 | Piston Seal (Primary) | 2 | Polyurethane |
| 2 | Rod Seal (Step-cut) | 2 | NBR + PTFE |
| 3 | Wiper Seal (Double-lipped) | 2 | Polyurethane |
| 4 | Buffer Seal | 2 | Polyurethane |
| 5 | Wear Ring (Piston) | 2 | PTFE Composite |
| 6 | Wear Ring (Gland) | 2 | PTFE Composite |
| 7 | O-Ring (Gland to barrel) | 2 | HNBR |
| 8 | O-Ring (Piston to rod) | 2 | HNBR |
| 9 | O-Ring (End cap) | 4 | HNBR |
| 10 | Backup Ring (Various sizes) | 4 | Nylon 66 |
| 11 | Dust Seal (Rod wiper) | 2 | Polyurethane |
| Model | Series | Application |
|---|---|---|
| 135D | D-Series | Bucket cylinder |
| 160D | D-Series | Bucket cylinder |
| 200D | D-Series | Bucket cylinder |
| 210D | D-Series | Bucket cylinder |
| 240D | D-Series | Bucket cylinder |
| 270D | D-Series | Bucket cylinder |
| 300D | D-Series | Bucket cylinder |
| 350D | D-Series | Bucket cylinder |
| 370D | D-Series | Bucket cylinder |
| 470D | D-Series | Bucket cylinder |
| 490D | D-Series | Bucket cylinder |
| 135G | G-Series | Bucket cylinder |
| 160G | G-Series | Bucket cylinder |
| 200G | G-Series | Bucket cylinder |
| 210G | G-Series | Bucket cylinder |
| 240G | G-Series | Bucket cylinder |
| 270G | G-Series | Bucket cylinder |
| 300G | G-Series | Bucket cylinder |
| 350G | G-Series | Bucket cylinder |
| 370G | G-Series | Bucket cylinder |
| 470G | G-Series | Bucket cylinder |
| 490G | G-Series | Bucket cylinder |
| Model | Series | Application |
|---|---|---|
| 320C | C-Series | Bucket cylinder |
| 320D | D-Series | Bucket cylinder |
| 322C | C-Series | Bucket cylinder |
| 322D | D-Series | Bucket cylinder |
| 325C | C-Series | Bucket cylinder |
| 325D | D-Series | Bucket cylinder |
| 330C | C-Series | Bucket cylinder |
| 330D | D-Series | Bucket cylinder |
| 336D | D-Series | Bucket cylinder |
| Model | Series | Application |
|---|---|---|
| ZX210 | -5, -6 | Bucket cylinder |
| ZX240 | -5, -6 | Bucket cylinder |
| ZX270 | -5, -6 | Bucket cylinder |
| ZX350 | -5, -6 | Bucket cylinder |
| ZX470 | -5, -6 | Bucket cylinder |
| Model | Series | Application |
|---|---|---|
| PC200 | -7, -8 | Bucket cylinder |
| PC210 | -7, -8 | Bucket cylinder |
| PC220 | -7, -8 | Bucket cylinder |
| PC300 | -7, -8 | Bucket cylinder |
| PC350 | -7, -8 | Bucket cylinder |
| PC400 | -7, -8 | Bucket cylinder |
| Parameter | Typical Range |
|---|---|
| Bore Diameter | 85-120 mm |
| Rod Diameter | 50-75 mm |
| Stroke | 500-900 mm |
| Working Pressure | 280-350 bar |
Decompose picturesNote: Verify cylinder dimensions with your equipment manual before ordering. Contact COGENG with your machine model, serial number, and cylinder measurements for exact compatibility confirmation.
| NO | Number | Name | Qty |
| - | 4643260 | CYLINDER; BUCKET | 1 |
| 1 | 976001 | . TUBE; CYLINDER ASSEMBLY | 1 |
| 1A | - | .. TUBE; CYLINDER | 1 |
| 1B | 4397790 | .. BUSHING; PIN | 2 |
| 2 | 976002 | . ROD; PISTON ASSEMBLY | 1 |
| 2A | - | .. ROD; PISTON | 1 |
| 2B | 4381857 | .. BUSHING; PIN | 2 |
| 3 | 880603 | . HEAD; CYLINDER | 1 |
| 4 | 309204 | . BUSHING | 1 |
| 5 | 236905 | . RING; RETAINING | 1 |
| 6 | 976013 | . RING; BUFFER | 1 |
| 7 | 976014 | . U-RING | 1 |
| 8 | 667405 | . RING; BACK-UP | 1 |
| 9 | 481803 | . RING; WIPER | 1 |
| 10 | A811135 | . O-RING | 1 |
| 11 | 679904 | . RING; BACK-UP | 1 |
| 12 | 219305 | . BOLT; SOCKET | 12 |
| 13 | 976008 | . BEARING; CUSHION | 1 |
| 14 | 976009 | . PISTON | 1 |
| 15 | 224106 | . RING; SEAL ASSEMBLY | 1 |
| 15A | - | .. RING; SEAL | 1 |
| 15B | - | .. O-RING | 1 |
| 16 | 880605 | . RING; BACK-UP | 2 |
| 17 | 960302 | . RING; SLIDE | 2 |
| 18 | 224108 | . RING; SLIDE | 2 |
| 19 | 976010 | . SCREW; SET | 1 |
| 20 | 104404 | . BALL | 1 |
| 22 | 4067901 | . RING; WIPER | 2 |
| 24 | 4074008 | . RING; WIPER | 2 |
| 25 | 926707 | . JOINT | 1 |
| 26 | 976011 | . PIPE | 1 |
| 27 | 984614 | . O-RING | 2 |
| 28 | M341236 | . BOLT; SOCKET | 8 |
| 29 | 974314 | . BAND | 1 |
| 30 | 373419 | . BAND | 1 |
| 31 | J901035 | . BOLT | 2 |
| 32 | A590910 | . WASHER | 2 |
| 33 | 309219 | . CLAMP; PIPE | 1 |
| 34 | 224115 | . BOLT | 1 |
| 35 | 208516 | . WASHER; SPRING | 1 |
| 36 | 271312 | . FITTING; GREASE | 1 |
| 37 | J75481 | . FITTING; GREASE | 1 |
| 38 | 976012 | . ADAPTER | 1 |
| 39 | 4506429 | . O-RING | 1 |
| 40 | 409110 | . BOLT | 2 |
| 100 | 4649053 | KIT; SEAL | 1 |
| 100 | 4649053 | KIT; SEAL | 1 |
Q: What equipment models use the 4649053 equivalent bucket cylinder seal kit?
A: The 4649053 equivalent bucket cylinder seal kit is commonly used on select excavator models where this part number is specified, with applications often including Hitachi, John Deere, and other OEM equipment bucket cylinders. Compatibility can vary by cylinder model, serial number, and production year. Always verify this part number against your cylinder's original seal kit reference or your machine's parts manual before ordering.
Q: What are the symptoms of failing bucket cylinder seals?
A: Common symptoms include visible hydraulic oil leaking from the bucket cylinder rod or gland area, decreased bucket digging or holding force, cylinder drift where the bucket slowly droops under load, jerky or erratic bucket movement, and external oil residue accumulating around the cylinder. Prompt seal replacement helps prevent internal cylinder scoring and more extensive repairs.
Q: What is included in the COGENG 4649053 equivalent seal kit?
A: Each complete seal kit includes piston seals, rod seals, wiper seals, O-rings, backup rings, and gland seals needed for a full bucket cylinder overhaul. COGENG kits are manufactured using high-grade materials that meet or exceed OEM specifications for abrasion resistance, temperature tolerance, and extended service life in demanding bucket cylinder applications.
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