SKU SK-KOM-PC50-BOOM
Komatsu PC50MR-2 Boom Cylinder Seal Kit
completeFull service kitwire ring gland
90 mm bore, 55 mm rod. Wire-ring gland — the retaining wire comes out through a slot in the tube, and it will fight you.
What's in this kit
Every seal in the kit, with its material and size.
| # | Qty | Part | Material | ID | OD / cross-section | Height | Shore A |
|---|---|---|---|---|---|---|---|
| 1 | 1 | Rod sealRS-M55-M67-M8 · polypak | Polyurethane | 55 mm (2.1654") | 67 mm (2.6378") | 8 mm (0.315") | 90 |
| 2 | 1 | Buffer sealBS-M55-M67-M6 · buffer | PTFE / NBR | 55 mm (2.1654") | 67 mm (2.6378") | 6 mm (0.2362") | — |
| 3 | 1 | WiperWP-M55-M65-M7 · dust wiper | Polyurethane | 55 mm (2.1654") | 65 mm (2.5591") | 7 mm (0.2756") | 90 |
| 4 | 1 | Rod bushingRB-M55-M59-M10 · guide band | Bronze-filled PTFE | 55 mm (2.1654") | 59 mm (2.3228") | 10 mm (0.3937") | — |
| 5 | 1 | Piston sealPS-M70-M90-M10 · t-seal | Polyurethane | 70 mm (2.7559") | 90 mm (3.5433") | 10 mm (0.3937") | 90 |
| 6 | 1 | O-ringOR-M70-M4 · energizer | Nitrile (NBR) | 70 mm (2.7559") | 3.53 mm (0.139") | — | 70 |
| 7 | 2 | Wear ringWR-M84-M90-M12 · guide band | Bronze-filled PTFE | 84 mm (3.3071") | 90 mm (3.5433") | 12 mm (0.4724") | — |
| 8 | 1 | O-ringOR-M93-M4 · gland seal | Nitrile (NBR) | 93 mm (3.6614") | 3.53 mm (0.139") | — | 90 |
| 9 | 2 | Backup ringBU-M93-M100-M2 · backup | Nylon | 93 mm (3.6614") | 100 mm (3.937") | 1.5 mm (0.0591") | — |
Cylinders this kit services
Komatsu PC50MR-2 Boom Cylinder
- OEM no.
- 707-99-47600
- Bore
- 90 mm (3.5433")
- Rod
- 55 mm (2.1654")
- Stroke
- 720 mm (28.3465")
- Gland
- wire ring
- Port
- Code 61 flange
- Rod eye
- spherical bearing
What this fits
| Machine | Serial range | Position |
|---|---|---|
| Komatsu PC50MR-2 | All serials | Boom / Lift |
Our kits are dimensional equivalents built from seals we buy in. They fit and replace the original. They are not OEM parts and carry no OEM branding.
Not finding it?
Not sure this is right?
Check it with a caliper before you buy — how to measure bore, rod and stroke covers the mistakes behind most wrong orders. Send us the numbers and a photo of the old seals and we’ll confirm the fit before you spend anything.
Request a kit