515-2707 cartridge relief valve assembly CAT excavator spare part

515-2707 cartridge relief valve assembly CAT excavator spare part Featured Image
  • 515-2707 cartridge relief valve assembly CAT excavator spare part

Short Description:

Part No.515-2707, CAT relief valve assembly, cartridge pilot operated relief valve, limits hydraulic circuit pressure, fits CAT 345D, 349D, E349E excavator control valve.


Product Detail

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description

This 515-2707 cartridge relief valve assembly is installed inside main control valve block, pilot operated structure. It opens and releases oil automatically when system pressure exceeds preset value, protecting hydraulic pump, cylinders and pipelines from overpressure damage. Valve body is high-strength steel, precision ground spool, built-in spring and O-rings, oil corrosion and impact resistant, suitable for heavy digging and hammer work, replacement spare part for main valve overhaul.

Part No.：515-2707
Name：CAT relief valve assembly
Material: Carbon Steel
Type：Pilot operated cartridge relief valve
Thread size：1-5/16-12
Overall length：78.3mm
Application：CAT 349D2 L 349D2 352F 352F-VG 345C L 349E L 345D L 349F L 349D L 345C MH 349E L VG 349D 349E 349F 345C 345D L VG 345D W345C MH excavator

Advantages

1. Pilot operated design, smooth pressure response, low impact during relief, less pressure fluctuation
2. Precision matched spool and seat, good sealing, low internal leakage under holding pressure
3. Integrated cartridge structure, easy installation, directly fit valve bore without extra pipe modification
4. Stable spring performance, set pressure not easy to drift after repeated opening and closing

FAQ 

Q1：Can 515-2707 replace 487-3702 relief valve directly?
A：Direct swap is not recommended. They differ in setting pressure and bore parameters, verify before fitting.
Q2：What symptoms are caused by heavy internal leakage of relief valve?
A：Weak operation, slow lifting, high idle pressure and abnormal oil temperature rise.
Q3：Why pressure cannot reach standard value after new relief valve installation?
A：Scratched valve bore, fatigued spring, limited adjustment stroke or worn hydraulic pump.
Q4：What is the service life of new relief valve with dirty hydraulic oil?
A：Dirty oil easily causes spool sticking and short service life. Replace oil and filter together.

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