CATEngine Parts

7Y0631 Spring — Cat 320B

This spring is a critical component within the engine's valve train system, ensuring proper valve operation and timing. It is manufactured to meet stringent OEM standards, providing superior durability and consistent performance compared to a worn or fatigued spring. Operators may notice rough idling, loss of engine power, or unusual valve train noise when this spring begins to fail.

Spring – Part No 7Y0631 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

WhatsApp for Price & Availability☎ Call Mumbai Office

Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

patch before 3 PM IST.', };

Related CAT Parts

From the same category — may also be needed

343-5527
Fuel Water Separator Bowl
1723280
Body As-Piston
3767362
Body As-Piston
315-0047
Aftercooler Core
138-2073
Piston Ring Kit
341-4176
Temperature Sensor

Browse all CAT Engine Parts →

Ship This Part To Your Location

DubaiSaudi ArabiaNigeriaKenyaSouth AfricaBangladeshMalaysiaGhanaQatarEgypt
India
MaharashtraGujaratTamil NaduRajasthanKarnatakaTelangana

Full shipping information on regional pages · Air freight 2–12 days · GST invoice for India

Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeEngine Valve Spring
MaterialHigh-tensile steel alloy
ApplicationEngine valve train
Service LifeReplace every 4,000 hrs or as needed
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing spring may include intermittent engine misfires or a slight reduction in engine responsiveness. If left unaddressed, the engine may develop persistent rough idling and a noticeable loss of power under load. Continued operation with a weakened spring risks improper valve seating, leading to reduced compression and potential damage to other valve train components.

Installation Tip

Ensure the valve spring compressor tool is correctly seated to avoid damaging the valve stem or spring retainer. Do not overtake the valve spring retainer nut, as this can over-compress the spring and reduce its lifespan.

Service Note

Inspect valve guides, seals, and retainers for wear or damage when replacing the valve spring.