Piston with Pin and Clips 297-7750A (STD) for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 297-7750)

Standard piston assembly with pin and clips (102 mm bore, 57.6 mm combustion chamber), replacement for Caterpillar 297-7750. Fits 3066 / S6K / C6.4 (3064 / C4.2) engines.
Piston with Pin and Clips 297-7750A (STD) for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 297-7750)
Piston with Pin and Clips 297-7750A (STD) for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 297-7750)
Piston with Pin and Clips 297-7750A (STD) for Caterpillar 3066 / S6K / C6.4 Engine (Replaces 297-7750)
AI Search Summary

Piston assembly (with pin and clips) for Caterpillar 3066 / S6K / C6.4 engines, replacement for CAT 297-7750. 102 mm bore, fitted on CAT 924G / 7MS1-UP wheel loaders.

Key Facts
MOQ6件
Lead Time15-30 Days
Warranty12 Months
MaterialForged Aluminium Alloy
OEM / Reference
2977750CA2977750297-7750A297-7750
Available — Xi’an consolidation point · reply within 24h
Compatible with: Caterpillar / 924G, 7MS1-UP, 7MS2099 · Engine: CAT 3064 / 3066 / C4.2 / C6.4 / S6K / S6KT
40+Machine brands covered
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Overview

Fitment Note: Confirmed by the removed part number and the cylinder bore. Standard size, 102 mm bore, 57.6 mm combustion chamber. Supplied as piston + pin + clips; rings quoted separately.
Specifications
MOQ6 pcs
TypePiston with Pin and Clips (STD)
EngineCAT 3066 / S6K / C6.4
IncludedPiston + pin + clips
MaterialForged Aluminium Alloy
PositionCylinder bore
ReplacesCAT 297-7750
ShippingRail / Sea / Air
Warranty12 Months
Lead Time15-30 Days
ApplicationCAT 3064T / 3066 engines
Bore Diameter102 mm
Combustion Chamber57.60 mm
Engine piston assembly (with piston pin and clips, standard STD) for the Caterpillar 3066 / S6K / C6.4 diesel engine family (also 3064 / C4.2) — a direct replacement for the original Caterpillar 297-7750. Bore diameter 102 mm, combustion chamber diameter 57.60 mm, forged aluminium alloy, finished crown with a coated skirt. The piston reciprocates in the cylinder, takes the combustion load and transfers it to the crankshaft. The piston is a core engine wear item. Typical failures are ring-groove wear, skirt scuffing / wear, crown burning and pin-bore wear, causing piston slap, blow-by, high oil consumption, power loss and low compression. It is normally replaced as a full set (with the pin, clips and rings) during an overhaul or when the liner is re-bored / replaced. Supplied as a single assembly (piston + pin + clips; rings supplied separately). Confirm the removed part number, the bore diameter (102 mm) and the compression height before ordering; observe the piston orientation marks and the pin-to-rod fit, then check the liner clearance and ring end gap after assembly.

Key Features

  • Direct replacement for CAT 297-7750
  • Standard size, 102 mm bore, 57.6 mm combustion chamber
  • Forged aluminium alloy with a coated skirt
  • Supplied as piston + pin + clips (rings available separately)
  • Fits Caterpillar 3066 / S6K / C6.4 (3064 / C4.2) engines

Fits these machines

924G 7MS1-UP 7MS2099

Common Fault Symptoms

Piston slap / knock, high oil consumption, blow-by (high crankcase pressure), power loss, low compression, skirt scuffing and ring-groove wear.

Installation Tips

  1. 1. Check the liner bore, roundness and the piston ring end gap before fitting.
  2. 2. Fit the pin and new clips to the piston; observe the piston orientation marks.
  3. 3. Use new piston rings and a ring compressor to install the assembly.
  4. 4. Check the piston-to-liner clearance and ring side clearance to specification.
  5. 5. Lubricate and turn the engine over by hand before starting.

Technical Data

MaterialForged Aluminium Alloy
DimensionsBore 102 mm, combustion chamber 57.60 mm
PackageCarton / Wooden Case
SystemEngine System
PositionInternal
Manufacturer QMSISO9001
Warranty12 Months
Lead Time15-30 Days
MOQ6件
PackagingCarton, Wooden Case
Delivery15-30 Days
Quantity per Unit1 pc / cylinder

Fits these machines

924G 7MS1-UP 7MS2099
Part NumberMachine ModelTypeAvailability
2977750924G / 7MS1-UP / 7MS2099Replacement partIn Stock
CA2977750924G / 7MS1-UP / 7MS2099Replacement partIn Stock
297-7750A924G / 7MS1-UP / 7MS2099Replacement partIn Stock
297-7750924G / 7MS1-UP / 7MS2099Replacement partIn Stock

This is a partial reference. Send your part number or machine model — we source and confirm it for you.

Part Number Cross Reference

Original (OEM)2977750 / CA2977750 / 297-7750A / 297-7750
Brand No.CA2977750
Cross Reference297-7750
Cross Reference2977750
What you're quietly worried about
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ConcernImpactHow we help
Wrong part modelInstallation failure, extra costConfirmed by number, model and photos before shipment.
Unclear part numberDelays in sourcingWe identify the part from whatever info you have.
Poor qualityDowntime and complaintsStable replacement elements; every unit checked.
Slow responseProject delaysReply within 24 hours.
Many suppliersComplex procurement, higher costWide coverage, mixed orders from one source.
Shipping riskDamage or late arrivalExport packing and the right shipping method.
High MOQFinancial riskFlexible quantity — start small.
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Send your request

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04

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05

Inspection & packing

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06

Shipping & delivery

Express, air, rail or sea — with tracking after dispatch.

Frequently asked questions
Is 297-7750A the same as 297-7750?

297-7750A is our replacement for the original Caterpillar 297-7750 piston assembly. The original number is kept for cross-reference.

What is the size?

Standard size for a 102 mm bore, combustion chamber 57.6 mm. Tell us the measured bore if you are unsure.

What is included?

Piston + piston pin + pin clips; piston rings are quoted separately.

What engine does it fit?

Caterpillar 3066 / S6K / C6.4 (also 3064 / C4.2).

What should I send to confirm?

Photos of the old piston, the engine nameplate, your machine model and the cylinder bore.

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By Machine Model
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Why buyers trust us
Each concern answered with a specific action.
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Same series, different machine — different part.
We confirm by part number, model and photos before shipment.
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Waiting days for a price loses the deal.
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Cheap parts fail and cause downtime.
Every unit checked; stable replacement-grade parts.
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Proper packing; express, air, rail or sea with tracking.
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