HCHC MACHINERY PARTS
Relief Valve · Main Relief

E307D MAIN GUN Relief Valve

Function: Main relief · Machine-fit: E307D MAIN GUN

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E307D MAIN GUN excavator relief valve
Main Relief / Control Valve

E307D MAIN GUN

Function: Main relief · Machine-fit: E307D MAIN GUN
Full specsAsk us for the data sheet
ConditionNew · OEM-standard aftermarket
Warranty6–12 months
Lead timeStock 48 h · Non-stock 5–15 days
WhatsApp this model Email inquiry ← Back to catalog

Valves are OEM-spec replacements, function-coded by suffix (MAIN GUN = main relief, TRAVEL/WALKING = travel circuit, SLEWING/SWING = swing circuit). Send the stamped number for a 1:1 match.

About This Relief Valve

Main relief valves set the maximum system pressure of the excavator hydraulic circuit. A worn or wrongly-adjusted main relief costs the machine power and heats the oil — these are direct OEM-spec replacements.

The E307D MAIN GUN is an OEM-standard aftermarket replacement built to the original mounting, spline and port specification. Bolt-on installation — no machining or adaptation required.

Every unit is inspected and pressure-checked before dispatch and ships with a test report. Stock models leave within 48 hours; non-stock units are typically ready in 5–15 days. Sea, air and express shipping are available worldwide, and our team answers quote requests within 12 hours — usually much faster on WhatsApp.

More Main Relief

F5X130 excavator relief valveF5X130M5X130 excavator relief valveM5X130M5X180 excavator relief valveM5X180DH220-5 SECONDARY excavator relief valveDH220-5 SECONDARYDH220-5 THROTTLING excavator relief valveDH220-5 THROTTLINGDH220-5 MAIN GUN excavator relief valveDH220-5 MAIN GUNDH500-9 MAIN GUN excavator relief valveDH500-9 MAIN GUNDH250 MAIN GUN excavator relief valveDH250 MAIN GUN

View all 45 models in the catalog →

How do I know which valve failed?

Typical symptoms: machine slow under load (main relief), travel drift or weak braking (travel relief), swing soft or over-swing (swing relief). Send the symptoms and machine model on WhatsApp and we point to the right valve.

Are these adjustable?

Main relief valves are pressure-adjustable like the originals; we ship them preset to the standard setting for the machine model.

Can I buy in bulk?

Yes — relief valves are a steady wholesale item. Ask for a mixed-container quote.

Get a Quote in 12 Hours

Send your part number, machine model or a nameplate photo — WhatsApp is fastest.

WhatsApp: +86 134 5036 5883 Email: [email protected]
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