CATExhaust & Turbo

115-9706 Muffler — Cat Excavator D5R D6H D6R D7R

This muffler is a key component of the exhaust system, designed to significantly reduce engine noise and ensure compliance with emission standards. Manufactured to meet CAT's rigorous quality specifications, it provides a durable and effective replacement for a damaged or worn original part. Operators will typically notice a drastic increase in engine sound, akin to an open exhaust, if this muffler fails.

Muffler – Part No 115-9706 – CAT Spare Part
Part Specifications
BrandCAT
CategoryExhaust & Turbo
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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Full shipping information on regional pages · Air freight 2–12 days · GST invoice for India

Installation & Application Notes

Allow turbo to idle 2–3 minutes before shutdown — this circulates oil through bearings and prevents coking. Check oil feed and drain lines for blockages before fitting new turbo. Replace oil and filter when fitting new turbo — old oil contains metal particles.

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

Part TypeMuffler
MaterialCoated steel
ApplicationExhaust system
Service LifeReplace as needed based on inspection
CompatibilityCAT D5R, D6H, D6R, D7R Excavators
ConditionNew — OEM specification aftermarket

Failure Symptoms

A failing muffler will immediately manifest as a very loud, unfiltered exhaust sound, indicating a breach in the internal baffling or casing. If ignored, exhaust leaks can worsen, potentially leading to reduced engine performance and increased exposure to harmful fumes. The risk of further exhaust system damage or component failure increases significantly.

Installation Tip

Ensure the mating surfaces of the exhaust pipe and muffler are clean and free from obstructions before assembly to guarantee a tight seal. Avoid using excessive force when tightening clamps, as this can damage the muffler inlet or outlet.

Service Note

Inspect the exhaust manifold and downpipe for cracks or leaks when replacing the muffler.