CATEngine Parts

263-2905 Air Shutoff Limit Switch — Cat 3508 3512

This air shutoff limit switch is designed to detect and signal when the engine's air intake reaches a predetermined limit, preventing over-speed conditions or damage. It is built with durable internal contacts and a robust housing to ensure reliable operation, unlike a worn switch that may fail to actuate or provide false signals. Operators might notice the engine failing to reach full power, unexpected shutdowns, or warning indicators related to air intake control when this switch malfunctions.

Air Shutoff Limit Switch – Part No 263-2905 – 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.

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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 TypeAir Shutoff Limit Switch
MaterialMetal and plastic composite
ApplicationEngine air intake control
Service LifeReplace as needed based on diagnostic testing
CompatibilityCAT Engine 3508, 3512, 3508B Generator SR4
ConditionNew — OEM specification aftermarket

Failure Symptoms

An initial symptom of a failing air shutoff limit switch might be the engine failing to reach its rated speed or experiencing intermittent power loss. If ignored, the engine could potentially over-speed, leading to internal component damage, or shut down unexpectedly during operation. Continued use with a faulty switch poses a risk to engine longevity and operational reliability.

Installation Tip

Carefully note the wiring connections before removing the old switch to ensure correct installation of the new one. Avoid forcing the switch into its mounting location; it should fit smoothly.

Service Note

Inspect the engine's air intake system for restrictions or leaks, and check the related engine control module wiring when replacing the 263-2905 air shutoff limit switch.