The main function of the seal pack in the excavator’s bulldozer cylinder is to prevent leakage of the working medium (both internal and external) and to prevent external contaminants (such as air, dust, and water) from entering the hydraulic components and the hydraulic system.

The seal pack is an essential component of the hydraulic system, consisting of various sealing components including but not limited to the main oil seal, buffer seal rings, and dust seals. These sealing components each have specific functions that collectively ensure the normal operation of the hydraulic system:

1.Main Oil Seal**: Primarily responsible for sealing the oil to prevent oil leakage, with its performance directly affecting whether the cylinder leaks oil. The selection of the main oil seal should be based on factors such as the condition of the cylinder and the working environment to ensure effective sealing.

2.Buffer Seal Rings**: Installed inside the cylinder head, these seals primarily work to cushion oil pressure rather than directly seal the oil. They play a crucial role in high-pressure and high-temperature working environments, impacting the lifespan and performance of the cylinder.

3.Dust Seals**: Installed on the outermost part, these seals primarily prevent external particles such as dust and water from entering the interior of the cylinder, protecting the cylinder from contamination and ensuring the normal operation of the hydraulic system.

In conclusion, the seal pack in the excavator’s bulldozer cylinder, through the functions of these sealing components, collectively ensures the sealing and stability of the hydraulic system, preventing leaks and contamination, protecting hydraulic components from damage, and ultimately ensuring the normal operation and extending the lifespan of the excavator.

Product NO.	Applicable models	Weight	Packaging unit
2440-9276KT	DH210W-7(S/N:20001~21000) DH210W-7(S/N:21001~) SOLAR 170W-V SOLAR 180W-V SOLAR 185W-V SOLAR 200W-V SOLAR 210W-V	0.259 KG	EA
2440-9201KT	DH55GOLD DH55GOLD(S/N:50001~) DH60-7 DX60 DX60 (S/N:50001~) DX60S DX60T DX55 DX55 ACE DX55A DX55MT DX55MT ACE DX60R E60 SOLAR 55 SOLAR 55-V (S/N 1~) SOLAR 55-V GOLD SOLAR 55-V GOLD PLUS SOLAR 55-V PLUS SOLAR 55-V SUPER	0.12 KG	EA
401107-01275	DH55GOLD DX55-5B DX55-5C DX55-9C(CN) ACE DX55-9C(CN)/DX60E-9C(CN)/DX60E-9C ACE DX60E-10/DX60E-10N(S/N:20001~) DX60E-10/DX60E-10N(S/N:30001~) DX60E-10/DX60E-10N(S/N:50001~) E58 DX50Z-7 DX50Z-7M DX55 DX55 ACE DX55 ACE PLUS(S/N:7180~) DX55MT ACE DX55MTACEPLUS(S/N:6557~) DX55R-7 DX55R-7M DX60R DX60R-7 DX62R-3 DX62R-7 DX63-3 DX63-5 DX63-7 E60 E62 E63	0.087 KG	EA
440-00393KT	DH80-7 DH80GOLD DH80GOLD(S/N:50001~) S80GOLD S80GOLD(S/N:50001~) SOLAR 75-V	0.152KG	EA
401107-00139A	DX125W-10/DX125W-10N DX125W-9C/DX125W-9CN DX150W(S2) DX150W-10/DX150W-10N DX150WE-10/DX150WE-10N DX150WE-9C/DX150WE-9CN DX140W-3 / DX160W-3 DX140W-3 / DX160W-3	0.19KG	EA
K9002309	DH150W-7S DX150W-7B DX150W-9C/DX150W-9CN DX140W / DX160W TIER-II DX140W / DX160W TIER-III DX140W ACE DX140WACEPLUS(S/N:8141~) DX140W TIER-II DX140W TIER-III DX140W-5 DX140W-5/DX160W-5 DX140W-5K(L)/DX160W-5K(L)(S/N:2485~) DX140W-7 / DX160W-7 DX140WA DX150W-7 / DX170W-7 DX165W-5 DX165WR-7 DX170WR-7 DX140W/DX160W	0.125KG	EA
K9003936	DH210W-7S DX210W-10/DX210W-10N DX210W-7B DX210W-9C(S/N:30001~) DX210W-9C/DX210W-9CN DX180LC-3 DX180LC-5 DX190W DX190W-3 DX190W-5 DX190W-7 DX190WA(T-2) DX210W DX210W DX210W-5 DX210W-5B DX210W-5K(L) DX210W-7 DX210WA DX210WA(T-2) DX220W-7 DX225LC-3 DX180LC-3 DX225LC-3	0.266 KG	EA
K9006360	DX60W(S/N:20001~21000) DX60W(S/N:50001~)B55W-2 DX53W DX55W ACE DX55WA E55W	0.087 KG	EA