Detailed Product Description for Genuine Sany Relief Valve 2259-3-214505-01
Brand: Genuine Sany Hydraulic Spare Part
Sany Internal Material Code: 60075396
Matching Component: Dedicated Overload Relief Valve for GM70 Travel Reducer
In Stock, Packed in Paper Box, Price Quotation in US Dollars Is Negotiable
Main Business Scope: One-stop supply of various relief valves, counterbalance valves, spool assemblies for full range Sany travel motors, swing motors and reducers
1. Explanation of Part Number
Part Model: 2259-3-214505-01
This exclusive serial number is custom-made for integrated relief valve of GM70 travel reducer, corresponding to spool stroke, cracking pressure and threaded installation specification. The suffix "01" represents the upgraded iteration version with optimized pressure regulation stability and impact fatigue resistance.
Matching Assembly: GM70 Travel Reducer (Final Drive Assembly)
Material Code: 60075396, which can be directly searched for procurement, account checking and warehousing entry in official Sany ERP system.
2. Applicable Models
As an original overload protection valve matched with GM70 travel reducer, this relief valve fits multiple mainstream Sany excavator models, covering medium-tonnage earthmoving and mining equipment:
Models equipped with standard GM70 final drive on the same platform including SY265, SY755, SY485, etc.
It can directly replace the original relief valve inside the travel valve block without modifying valve bore, thread or installation dimensions, featuring strong interchangeability for maintenance.
3. Core Technical Parameters
| Parameter Item |
Technical Specification |
| Part Name |
Overload Relief Valve for Travel Reducer (Pressure Relief Protection Valve) |
| Original Part No. |
2259-3-214505-01 |
| Sany Material Code |
60075396 |
| Matching Assembly |
GM70 Travel Reducer / Integrated Valve Block of Travel Motor |
| Factory Preset Cracking Pressure |
35.5～37.5 MPa |
| Maximum Withstand Pressure |
42 MPa |
| Valve Structure |
Direct-acting Poppet Sealing Relief Structure |
| Installation Thread Type |
Cartridge built-in structure matching installation bore of GM70 |
| Compatible Hydraulic Oil |
46# & 68# anti-wear hydraulic oil |
| Operating Oil Temperature Range |
-20℃～+85℃ |
| Seal Material |
Composite sealing ring of oil-resistant nitrile rubber and fluororubber |
| Net Weight per Piece |
0.18kg |
4. Structure and Material Analysis
Valve Seat and Poppet Spool
Fabricated by precision grinding of high-strength alloy steel with surface carburizing and quenching treatment. It features high hardness and strong resistance to high-pressure impact. The lapped poppet surface delivers high sealing precision and sensitive opening/closing response during pressure relief, resisting internal leakage and incomplete closure under long-term high-pressure operation.
Pressure Adjusting Spring Assembly
Made of quenched and tempered alloy spring steel with outstanding fatigue resistance. Its elastic performance will not decay under frequent pressure relief impact, keeping system pressure stable without long-term drift and eliminating fluctuating travel pressure.
Outer Diameter Matching Surface of Valve Body
Processed by precision cylindrical grinding with reasonable cartridge fitting clearance for easy assembly and disassembly, free from radial shaking and sticking under high-pressure working conditions.
Seal Kit
Adopting double sealing ring design with resistance to hydraulic oil corrosion and high temperature, preventing oil seepage at valve bore and abnormal pressure loss caused by internal leakage.
5. Working Principle and Functions
Overload Pressure Protection
When the excavator travels against hard soil or stones resulting in pressure buildup, or stalls under heavy climbing load, the pressure of travel system rises sharply. Once reaching the preset cracking pressure of relief valve, the spool opens automatically to release excess pressure and divert high-pressure oil, protecting plungers, valve plates of travel motor and reducer gears from damage and tooth breakage due to overpressure.
System Pressure Stabilization
It limits the maximum output pressure of single-side travel, balancing pressure between left and right travel circuits to prevent track deviation and unbalanced traction caused by excessive pressure on one side.
Impact Load Buffering
It absorbs instantaneous peak hydraulic pressure during startup, emergency stop and collision with obstacles, mitigating impact damage to precision internal components of motors and reducers and extending the overall service life of final drive assemblies.
6. Advantages for Replacement
- With official Sany material code 60075396, this genuine part achieves 100% dimensional match with valve bore of GM70 travel unit for direct cartridge installation without grinding or modification.
- Precisely pressure-calibrated before delivery, requiring no repeated pressure adjustment after installation to improve maintenance efficiency and shorten equipment downtime.
- Superior sealing performance of poppet structure compared with ordinary aftermarket valves effectively prevents recurring faults such as weak travel, engine lugging and track deviation caused by internal leakage.
- Designed for anti-fatigue and anti-impact performance, it adapts to frequent heavy-load and bumpy traveling conditions on construction sites with longer service life and lower failure rate.
- Besides this model, we maintain full stock of complete hydraulic repair spare parts including travel & swing relief valves, counterbalance valves, compensation valves, valve sleeves and spools for all Sany models, supporting bulk foreign trade orders, bulk stocking for repair shops and OEM supporting supply.
7. Common Faults and Failure Manifestations of Valve
- Relief valve stuck open: Insufficient travel pressure, weak overall traveling power, poor climbing capacity, track deviation with one side running excessively fast
- Internal leakage from worn spool sealing: Slow pressure build-up, engine lugging under heavy load, abnormally rising oil temperature
- Fatigue and weakening of pressure adjusting spring: Low maximum system pressure, insufficient traction and digging force
- Stuck valve failing to fully close due to foreign impurities: Continuous pressure relief, abnormal motor noise and excessive overheating of reducer
- Oil seepage from aged sealing ring: External hydraulic oil leakage at valve bore, high oil consumption, accelerated component wear as impurities enter hydraulic system
8. Matching Spare Parts for GM70 Travel System (One-stop Supply)
GM70 travel reducer assembly, repair kit for plunger and valve plate of travel motor, counterbalance valve assembly, complete internal components of relief valve, floating oil seal, drive sprocket, track adjuster cylinder, loose gear parts for reducer, travel pipeline fittings, dedicated gear oil for reducer
