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12V-1-5/8 pilot relief valve
OE-Equivalent Replacement Quality
IATF 16949 / ISO 9001 / CE / RoHS
50 pcs
7 - 15 Days
12 Months
Caterpillar hydraulic relief circuits using the matching 1-5/8 cartridge envelope and circuit symbol
Confirm 12v, connector, 1-5/8-12 cartridge interface, seals and hydraulic circuit before installation.
| Quantity: | |
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12V-1-5/8 pilot relief valve is a 12V pilot operated solenoid relief valve for Caterpillar hydraulic relief circuits using the matching 1-5/8 cartridge envelope and circuit symbol. Buyers should confirm the complete old marking, electrical version, connector, 1-5/8-12 cartridge interface and hydraulic function before approving replacement stock.
Specification | Value |
|---|---|
Product Type | Pilot Operated Solenoid Relief Valve |
Primary Reference | 12V-1-5/8 pilot relief valve |
Cross References | No verified public OE number assigned |
Electrical Version | 12V |
Working Pressure Reference | 350 bar |
Interface | 1-5/8-12 cartridge interface |
Application Scope | Caterpillar hydraulic relief circuits using the matching 1-5/8 cartridge envelope and circuit symbol |
MOQ | 50 pcs |
Delivery Time | 7 to 15 Days |
Warranty | 12 Months |
Use the original catalog dimensional reference and hydraulic symbol to compare the valve with the removed component and the machine schematic before purchase approval.
Complete every control point below before a sample or bulk order is released.
Approval Point | Buyer Review |
|---|---|
Reference | Use the complete old valve marking and sample |
Electrical | 12V; verify at the loaded connector during the actual command |
Mechanical | Compare 1-5/8-12 cartridge interface, cartridge length, seals and installed clearance |
Hydraulic | Confirm normal state, energized state and manifold port relationship |
Machine Evidence | Caterpillar hydraulic relief circuits using the matching 1-5/8 cartridge envelope and circuit symbol |
Separate electrical command, cartridge movement and machine response so the actual wiring or hydraulic fault is not hidden by a parts replacement.
Observed Condition | Recommended Check |
|---|---|
No movement | Check loaded connector voltage, ground, controller command and coil resistance. |
Slow response | Inspect oil cleanliness, filter condition, viscosity and cartridge movement. |
Reversed response | Stop operation and compare normal and energized port logic with the original valve. |
External leakage | Inspect seals, cartridge surface, manifold bore and correct seating depth. |
Repeated heating | Confirm voltage, duty cycle, connector resistance and full magnetic movement. |
During a controller output fault is suspected, keep the verified reference, measurements and test result in the service record. Approve 12V-1-5/8 pilot relief valve from the complete old valve marking, 12v electrical version, connector keying, 1-5/8-12 cartridge interface, sealing lands and normal hydraulic state. A shared equipment model does not prove interchangeability because pump and manifold revisions can change during production. Send the machine model, serial number and clear removed part photos with the inquiry.
During a mixed voltage shipment reaches receiving inspection, keep the verified reference, measurements and test result in the service record. Read the coil label first and measure voltage at the connector while the real machine command is active. The working reference for this page is 12V. Do not infer voltage only from battery count because converters, harness changes and mixed voltage fleets can create misleading assumptions. Record the verified value on the purchase order and incoming inspection label.
During a serial controlled overhaul is prepared, keep the verified reference, measurements and test result in the service record. The 350 bar figure is a catalog or verified product reference, not permission to ignore the equipment hydraulic schematic. Confirm which ports see pressure in both de-energized and energized states, review return line conditions and follow the machine service limits. Pressure capability does not correct a wrong spool function, cartridge depth or manifold port relationship.
During a hydraulic schematic differs from the catalog port letters, keep the verified reference, measurements and test result in the service record. Use the drawing to compare overall length, thread or flange position, sealing diameters and connector clearance with the removed component. Read the spring side of the hydraulic symbol as the normal state and the solenoid side as the energized state. Port letters are catalog identifiers and must be reconciled with the equipment schematic before commissioning.
During a new supplier lot enters dimensional inspection, keep the verified reference, measurements and test result in the service record. Serial number evidence is essential whenever the same equipment family used more than one pump, manifold or electrical harness. Use it with the parts diagram rather than as a substitute for physical checks. If the old valve label is damaged, collect connector, mounting, cartridge and installed location photos so the application can be narrowed without guessing from the machine name alone.
During a seal leakage complaint is assessed, keep the verified reference, measurements and test result in the service record. Fine debris can restrict the moving element, damage sealing lands or block a pilot passage even when the coil energizes normally. Review the equipment filtration requirement, inspect the removed valve for particles and flush the affected circuit when contamination is found. Replacing 12V-1-5/8 pilot relief valve without correcting dirty oil can reproduce slow response, sticking or repeated coil stress soon after installation.
During a manifold bore shows possible wear, keep the verified reference, measurements and test result in the service record. Measure voltage across the coil while the controller commands the valve, then measure the positive and ground side drops separately. A static open circuit reading can look normal while a corroded terminal collapses under load. Compare the result with the confirmed 12v requirement and repair excessive resistance before judging the pilot operated solenoid relief valve itself as defective.
Send the complete old valve marking, confirmed voltage, machine model and serial number, connector photos, interface dimensions and required quantity for a fitment focused B2B quotation.
