3801468 Cum mins NT855 NTA855 Lower Gasket 4024919 3801235 3801463 3801574

Product Overview

Compatible Engine & Equipment Applications

• Heavy-Duty Construction Machinery: Large loaders, motor graders, mining bulldozers, off-road dump trucks and engineering construction equipment powered by NT855 STC engines
• Class 8 Heavy-Duty Trucks: Long-haul semi-trucks and heavy cargo transport vehicles equipped with STC timing control powertrain
• Industrial Power Generation Units: Stationary diesel generator sets, emergency power supply equipment and continuous-operation industrial power systems
• Marine & Special Heavy Machinery: Commercial marine auxiliary diesel engines and large agricultural heavy machinery with NT855 STC powertrain

Official OEM Part Numbers

Kit Components List

• Heavy-duty reinforced oil pan gasket with excellent vibration resistance and compression recovery
• High-pressure resistant crankshaft front & rear oil seals, anti-wear and anti-leakage for long-term operation
• Gear chamber cover gasket and timing system bottom-end sealing components exclusive for STC engines
• Lower engine cooling system gaskets and water passage sealing rings
• Lifter housing bottom gaskets and lower manifold auxiliary sealing cushions
• Full set of anti-aging rubber O-rings, sealing washers and buffer gaskets
• All matched bottom-end paper gaskets and precision sealing accessories for STC version

Key Features & Advantages

• Exclusive STC Version Precise Fit: This lower gasket set is professionally customized for the unique bottom-end structure of Cum mins NT855 STC step timing control engines. All sizes and installation positions strictly match STC engine parameters, supporting direct bolt-on installation without cutting or modification, completely solving the problem of ordinary non-STC gaskets failing to assemble or leak after installation.
• Superior High Oil Pressure & Anti-Leakage Performance: Optimized for NT855 high-torque heavy-duty engines, all sealing parts adopt upgraded thickened oil-resistant composite materials. It stably withstands long-term high lubricating oil pressure and strong engine vibration, fundamentally eliminating common stubborn faults such as crankshaft seal oil leakage and oil pan seepage that plague old gaskets.
• Excellent Anti-Aging & Deformation Resistance: All bottom-end gaskets and oil seals feature outstanding high-temperature resistance, oil corrosion resistance and fatigue resistance. They avoid permanent deformation, hardening and seal failure caused by long-hour heavy-load operation, maintaining lasting bottom-end sealing tightness and greatly extending service life.
• One-Time Complete Bottom-End Fault Repair: This all-inclusive STC lower gasket kit fully covers all lower engine sealing points. It thoroughly repairs typical STC engine bottom-end problems including lubrication system oil leakage, gear chamber oil spilling, lower coolant seepage and unstable crankcase pressure, realizing one-time thorough overhaul effect.
• High Cost-Effectiveness & Downtime Reduction: Effectively avoids recurring bottom-end leakage failures and repeated disassembly maintenance. It reduces engine oil consumption, maintenance costs and equipment downtime loss, perfectly restoring the lubrication system tightness and operational stability of NT855 STC heavy-duty equipment.

Important Compatibility Notes

Frequently Asked Questions (FAQ)

Warranty & Service