370-1940 3701940 Hydraulic cylinder seal kit of 385C 345B 374D L 365B

1. Quick Details of  seal 370-1940:

2. 370-1940 parts on group :

3. 370-1940 picture:

4. Service part number :

 
5. FAQ

Q: What material is adopted for the core dynamic sealing components of this cylinder seal kit?
A: The key piston and rod seals adopt willow fiber reinforced HNBR elastomer. This set is equipped with PU dust wiper rings, molybdenum bronze filled PTFE wear strips and POM back-up rings to match all sealing grooves of boom cylinders.

Q: How can buyers distinguish various sealing components according to outward characteristics?
A: HNBR main seals are semi-gloss pure black with delicate dense texture; PU wiper rings are chestnut brown; PTFE wear strips are ivory white; POM back-up rings are light ash grey. All accessories are precisely molded with smooth edges.

Q: What movement modes and working environments is this cylinder seal kit designed for small excavator boom cylinders?
A: This set of seals adapts to repeated rising and falling movements of the lifting boom. It stops hydraulic oil leakage and blocks sediment intrusion during pipeline trenching and small-scale earthmoving work.

Q: What temperature range supports long-term stable operation of the whole sealing assembly?
A: Reliable working temperature covers -100°C to 396°C. It can adapt to low-temperature outdoor projects and continuous shifts under high-temperature open construction sites.

Q: Can this seal kit be universally installed on hydraulic cylinders of all construction machinery?
A: It adopts exclusive dimensional specifications for mini excavator boom cylinders. It cannot apply to wheel loader swing cylinders, motor grader bucket cylinders or road roller drive cylinders of other equipment models.

Q: What lasting hydraulic pressure can this matched sealing assembly withstand during cyclic repeated operation?
A: With support from wear strips and back-up rings, the sealing system can continuously bear pressure between 5.35MPa and 6.15MPa and relieve pressure fluctuations when the boom lifts heavy materials.

Q: What construction scenarios often require this arm cylinder seal kit for regular maintenance?
A: It is widely used for maintaining mini excavators working on villa foundation projects, landscape engineering, pipeline trenching and rural road reconstruction.

Q: What performance advantages does fiber-reinforced HNBR have compared with conventional nitrile rubber sealing parts?
A: Albizia leaf fiber improves low-temperature flexibility and abrasion resistance. Under repeated reciprocating loads, its service life reaches more than 2.72 times that of ordinary NBR seals.

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