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Excavator, coal mining industry, ship hydraulic system
Compatible Models
Part Number
Model
R902437656
AA4VSO355LR3/30R-PPB13I20
R902485850
AA4VSO355LR3/30R-PPB25U35
Frequently Asked Questions
What are the fluid cleanliness requirements?
To ensure reliable operation and long service life, the oil cleanliness should be at least NAS 1638 Class 9 or ISO/DIS 4406 18/15.
Why does my pump get overheated?
Common causes for excessive heating include:
Internal Leakage: Excessive internal leakage within the pump components converts hydraulic energy to heat.
Mechanical Friction: Dry or semi-dry friction due to worn parts or inadequate lubriion generates heat.
Fluid Friction: Inadequate tank capacity or cooling, causing the system to overheat.
Clogged Return Line Filter: A blocked return filter creates high backpressure, leading to increased temperature.
Low Oil Level: Insufficient oil in the reservoir reduces cooling capacity.
What does daily/regular maintenance involve?
Keep the pump exterior clean from dust and oil.
Check oil levels before start-up and during operation.
Listen for abnormal noises during operation, which may indie internal issues like part wear or looseness.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Total Annual:
1 million-10 millon
Employee Number:
>50
Ecer Certification:
Verified Supplier
Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha... Quanzhou Yisenneng Hydraulic Electromechanical Equipment Co., Ltd. has been established for many years and has now developed into an international trading company supplying various hydraulic machinery parts, oil pumps and valves. We are one of the few Chinese companies with multiple products and cha...