721-98-00660 7219800660 SERVICE KIT, BOOM CYLINDER PC200LC-8M0 PC210-10M0
Price:
Negotiable
MOQ:
10
Delivery Time:
Within 5-15 days after getting your desposit
Brand:
OUB
Product Description
1. Quick Details of seal 721-98-00660:
| Part NO. | 721-98-00660 |
| Machine | Excavator |
| Size | OEM |
| Material | PU,RUBBER,PTFE,SPCC |
| Type | BOOM CYLINDER SEAL KITS |
2. 721-98-00660 parts on group :
| NO. | PART NO. | PRAT NAME | QTY |
| 1 | 134-32-61221 | Nut | 50 |
| 2 | 20Y-32-31210 | Bolt | 50 |
| 3 | 07000-B3030 | O-ring | 1 |
| 4 | 07000-B3035 | O-ring | 1 |
| 5 | 07000-B5075 | O-ring | 1 |
| 6 | 07000-B5110 | O-ring | 2 |
| 7 | 07145-00070 | Seal, Dust | 2 |
| 8 | 07145-00080 | Seal, Dust | 2 |
| 9 | 707-35-30750 | Ring, Back-up | 2 |
| 10 | 707-35-31110 | Ring, Back-up | 3 |
| 11 | 707-39-12140 | Ring, Wear | 2 |
| 12 | 707-44-12150 | Ring, Piston | 1 |
| 13 | 707-51-85650 | Ring, Buffer | 1 |
| 14 | 707-51-85860 | Packing, Rod | 1 |
| 15 | 707-56-85740 | Seal, Dust | 1 |
| 16 | 721-98-00690 | Seal Kit, Arm Cylinder | |
| 17 | 07000-B3030 | O-ring | 1 |
| 18 | 07000-B5085 | O-ring | 1 |
| 19 | 07000-B5125 | O-ring | 2 |
| 20 | 07002-62034 | O-ring | 1 |
| 21 | 07145-00080 | Seal, Dust | 4 |
| 22 | 707-35-30850 | Ring, Back-up | 2 |
| 23 | 707-35-31260 | Ring, Back-up | 3 |
| 24 | 707-39-13530 | Ring, Wear | 2 |
| 25 | 707-44-13250 | Ring, Piston | 1 |
| 26 | 707-51-95650 | Ring, Buffer | 1 |
| 27 | 707-51-95860 | Packing, Rod | 1 |
| 28 | 707-56-95740 | Seal, Dust | 1 |
| 29 | 721-98-04190 | Seal Kit, Bucket Cylinder | |
| 30 | 07000-B3030 | O-ring | 1 |
| 31 | 07000-B5080 | O-ring | 1 |
| 32 | 07000-B5105 | O-ring | 1 |
| 33 | 07145-00070 | Seal, Dust | 2 |
| 34 | 20Y-70-23220 | Seal, Dust | 2 |
| 35 | 707-35-30800 | Ring, Back-up | 2 |
| 36 | 707-35-31060 | Ring, Back-up | 1 |
| 37 | 707-39-11530 | Ring, Wear | 2 |
| 38 | 707-44-11250 | Ring, Piston | 1 |
| 39 | 707-51-80650 | Ring, Buffer | 1 |
| 40 | 707-51-80860 | Packing, Rod | 1 |
| 41 | 707-56-80740 | Seal, Dust | 1 |
| 42 | 07000-B3030 | O-ring | 1 |
| 43 | 07000-B5080 | O-ring | 1 |
| 44 | 07000-B5105 | O-ring | 1 |
| 45 | 07145-00070 | Seal, Dust | 2 |
| 46 | 20Y-70-23220 | Seal, Dust | 2 |
| 47 | 707-35-30800 | Ring, Back-up | 2 |
| 48 | 707-35-31060 | Ring, Back-up | 1 |
| 49 | 707-39-11530 | Ring, Wear | 2 |
| 50 | 707-44-11250 | Ring, Piston | 1 |
| 51 | 707-51-80650 | Ring, Buffer | 1 |
| 52 | 707-51-80860 | Packing, Rod | 1 |
| 53 | 707-56-80770 | Seal, Dust | 1 |
| 54 | 707-56-80800 | Seal, Dust | 3 |
| 55 | 134-32-61221 | Nut | 50 |
| 56 | 20Y-32-31211 | Bolt | 50 |
3. 721-98-00660 picture:
4. Service part number :
| PART NO. | PART NO. | Part NO. |
| 707-98-56210 | 707-51-45640 | 707-99-75600 |
| 707-98-56600 | 707-98-25870 | 707-51-80640 |
| 707-51-45640 | 707-51-14110 | 707-98-36600 |
| 707-51-45650 | 707-51-14130 | 707-98-36630 |
| 707-51-50640 | 707-51-16030 | 707-51-11690 |
| 707-51-55630 | 707-98-27100 | 707-51-12630 |
| 707-51-55640 | 707-51-16130 | 707-51-12640 |
| 707-51-60640 | 707-51-12630 | 707-51-12650 |
| 707-51-60650 | 707-51-12640 | 707-44-10911 |
| 707-51-65630 | 707-51-12650 | 707-44-11080 |
| 707-51-65640 | 707-44-10911 | 707-98-37510 |
| 707-51-65650 | 707-44-11080 | 707-98-37570 |
| 707-51-70630 | 707-44-11150 | 707-98-37580 |
| 707-51-70650 | 707-98-60120 | 707-51-20250 |
| 707-99-77240 | 707-98-60121 | 707-35-52700 |
5. FAQ
Q: What common mistakes cause early seal kit failure?
A: Common issues include poor cleaning leading to contamination, overstretching or twisting seals during installation, using incompatible lubricants, not replacing worn guide rings, and damaging seals with sharp tools.
Q: What do you think the saying that the rod seal is the most important of boom cylinder seal kit?
A: You are absolutely on the right track. If we are talking about what keeps the machine running safely and prevents a major mess on the job site, the rod seal is definitely the most critical component in a Komatsu boom cylinder seal kit.While the rod seal prevents external leaks, it doesn't work alone. A standard cylinder seal kit relies on a few other critical components to keep the rod seal from failing prematurely:
Wiper Seal (Dust Seal):Scrapes dirt, mud, and water off the rod before it retracts into the cylinder.
Buffer Seal:Absorbs sudden pressure spikes from heavy digging loads.
Piston Seal:Separates the two internal chambers of the cylinder.
You are 100% right that the rod seal is the most critical for preventing external failure and catastrophic oil loss. However, when rebuilt, it is highly recommended to replace the wiper and buffer seals at the exact same time, as they act as the bodyguard for that all-important rod seal.
Q: Can I reuse old seals from the kit?
A: No, reusing old seals is never recommended. Even if they look fine, they lose elasticity and develop hidden wear. Always install all new seals from the kit during a rebuild.
Q: Can I reuse any of the old seals from the kit?
A: No, reusing old seals is never recommended. Even if they appear undamaged, they lose elasticity and develop hidden wear during operation. Always install all new seals from the kit during a rebuild.
6. Exhibition and Wearhous
Oil seals,Hydraulic Seals, Cylinders Seal Kits, And More
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Guangzhou Opal Machinery Parts Operation Department
Location
NO.212,Zhu ji rode,tian he distric,guangzhou,China
Contact Person
Vivian