CATEngine Parts

185-7688 Hydraulic Cylinder Seal Kit — Cat 3306

This hydraulic cylinder seal kit is designed to restore the sealing performance of main hydraulic cylinders, crucial for the machine's operational power. It is manufactured using high-grade materials that meet OEM standards for resilience and longevity, offering superior protection against leaks and pressure loss compared to worn seals. Operators may notice a decrease in hydraulic system pressure, slow or erratic cylinder movement, or external fluid leaks when this kit is required.

Hydraulic Cylinder Seal Kit – Part No 185-7688 – 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

cript>

Related CAT Parts

From the same category — may also be needed

344-7392
Pressure Sensor
289-1453
Turbo Btv7511 Turbocharger
6t-9519
Excavators & Dozers
442-0106
Hydraulic And Transmission Filter
4V9804
Plate
148-4632-1484632
Sun Gear 148 4632

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 TypeHydraulic Cylinder Seal Kit
MaterialNBR rubber and polyurethane
ApplicationMain hydraulic cylinders
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The initial symptom of failing hydraulic cylinder seals is often a gradual loss of hydraulic pressure or noticeable external fluid leakage. As the condition worsens, cylinder operation becomes sluggish, inconsistent, or fails to hold position under load. Continued operation risks significant damage to the hydraulic pump and other system components due to pressure loss and contamination.

Installation Tip

Thoroughly clean the cylinder bore and piston rod, removing all old seal material and debris, as any remaining particles can damage the new seals. Ensure all new seals are properly oriented according to the kit's instructions to prevent immediate failure.

Service Note

Inspect the hydraulic fluid for signs of contamination and check the condition of the hydraulic pump and filters when replacing cylinder seals.