MUFFLER 2666252 - Caterpillar

2666252 MUFFLER Caterpillar parts 320C, 320C FM

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Alternative (cross code) number:
CA2666252
266-6252
2666252

Weight: 35 pounds 15 kg.

Information:

BODY DIAMETER/WIDTH 283.2 mm

BODY LENGTH 645 mm

INLET ID 66 mm

OUTLET OD 94 mm

OVAL HEIGHT 0 mm

OVERALL LENGTH 645 mm

PROTECTIVE SHIELD N

WITH EJECTOR N

WITH MOUNTING BRACKET N

WITH OUTER WRAP N

Buy MUFFLER 2666252 Caterpillar genuine, new aftermarket tractor parts with delivery
EXCAVATOR,

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FridayParts Muffler Silencer 266-6252 266-6250 Compatible for Caterpillar Excavator CAT E320C 320C 320CL 320CLN Engine 3066

$199.00

01 Oct 2025

CN: FridayParts

FridayParts Muffler Silencer 266-6252 266-6250 Compatible for Caterpillar Excavator CAT E320C 320C 320CL 320CLN Engine 3066
FP FRIDAYPARTS New aftermarket parts || Part Number: 2666252 2666250 266-6252 266-6250 || Applications: Compatible for Caterpillar Excavator E320C 320C 320CL 320CLN Engine 3066 || Specification: Diameter (mm)：290; Height (mm)：625; Inlet Diameter (mm)：70; Outlet Diameter (mm)：90. || See Details: 320C, 320C L, 320C LN, 320C S Excavators BBL00001-UP (MACHINE) POWERED BY 3066 Engine. 320C &320C L Excavators AMC00001-UP (MACHINE) POWERED BY 3066 Engine. 320C &320C L Excavators BDC00001-UP (MACHINE) POWERED BY 3066 Engine. 320C &320C L Excavators BPR00001-UP (MACHINE) POWERED BY 3066 Engine. || See Details: 320C Forest Swing Machine BGB00001-UP (MACHINE) POWERED BY 3066 Engine. 320C U 320C LU Excavators CLM00001-UP (MACHINE) POWERED BY 3066 Engine. 320C Excavators HBC00001-UP (MACHINE) POWERED BY 3066 Engine. 320C Material Handler JPL00001-UP (MACHINE) POWERED BY 3066 Engine. || Please make sure your part number and items are the same with our product listing before ordering, any problem please feel free to contact us, thanks.

Stevens Lake Parts One New Muffler Fits CAT, Fits Caterpillar 320C, D6M Models Interchangeable with 266-6252, 266-6252-A, 2666252, 2666252-A

$249.99

16 Aug 2025
45.0[20.25] pounds
US: RAParts Inc.

Stevens Lake Parts One New Muffler Fits CAT, Fits Caterpillar 320C, D6M Models Interchangeable with 266-6252, 266-6252-A, 2666252, 2666252-A
Stevens Lake Parts One New Aftermarket Replacement Muffler That || This Is An Aftermarket Replacement Part Made To Meet Or Exceed OEM Specifications. || OEM Numbers Are Provided for Reference Only. Please Verify Fit Prior To Ordering. || Please Note: Some Listings Use Stock Images for Reference and May Differ from the Actual Product. || This Aftermarket Part Is Made to Meet or Exceed Manufacturer (OEM) Specifications.

RAParts 2666252 Fits Caterpillar Fits CAT Industrial Construction Muffler D6M

$249.99

16 Aug 2025
45.0[20.25] pounds
US: RAParts Inc.

RAParts 2666252 Fits Caterpillar Fits CAT Industrial Construction Muffler D6M
Reliable Aftermarket Parts One New Aftermarket Replacement Muffler That Fits Caterpillar Industrial Construction Model: D6M Rep || OEM Numbers Are Provided for Reference Only. Please Verify Fit Prior To Ordering. || Please Note: Some Listings Use Stock Images for Reference and May Differ from the Actual Product. || This Aftermarket Part Is Made to Meet or Exceed Manufacturer (OEM) Specifications. || All OEM part numbers and logos are to be used for identification purposes only.

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Number on catalog scheme: 1

Caterpillar 2666252 Parts scheme MUFFLER

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Compatible equipment models: 2666252:

EXCAVATOR 320C 320C FM Caterpillar

Information:

Engine:
3126B (S/N: DCS1-UP; 9ZF1-UP; BEJ1-UP; 3GS1-UP; BDZ1-UP)
C7 (S/N: C7B1-UP; C7X1-UP)
SPP101 (S/N: 7151-UP)
Use care when servicing HEUI pumps in Table 1. When the fuel line fittings and the fittings for the oil line are assembled to the pump, an excessive torque that is applied to the fittings can damage the threads of the pump ports. If the pump requires service, refer to Illustrations 1, 2 and 3.When you service the pump drive gear, inspect the pump drive gear. If the pump drive gear is loose or the pump drive gear is damaged, the pump should be replaced and the engine oil filter should be changed.Plug (5) is the only plug that is serviceable. The other plugs of the pump group are not serviceable. Check the other plugs of the pump group for leaks. Replace the pump if any of the other plugs on the pump group are leaking. Inspect the O-ring seal. If the O-ring seal is worn or if the O-ring seal is damaged, replace the O-ring seal.
Table 1
Unit Injector Pump Base Pump Group
172-5210 173-4050
162-9608 162-9610
Illustration 1 g01224288
(1) Unit Injector Hydraulic Pump (2) Tighten the bolt that holds the gear to the following torque. ... 108.8 13.6 N m (80 10 lb ft) (3) The high pressure relief valve is set to the following pressure. ... 32.2 1.7 MPa (4670 247 psi)
Illustration 2 g01224291
(4) Tighten the fitting for the oil inlet port to the following torque. ... 71.5 7.5 N m (52.7 5.5 lb ft) (5) Tighten the plug to the following torque. ... 6.0 0.7 N m (53 6 lb in) (6) Tighten the plug to the following torque. ... 10.75 1.25 N m (95 11 lb in) (7) Tighten the valve to the following torque. ... 50 5 N m (37 4 lb ft) (8) Tighten the fitting for the oil outlet port to the following torque. ... 23 2 N m (17.0 1.5 lb ft) (9) Orient the open face of the nut away from the pump. Tighten the nut to the following torque. ... 5.5 1.5 N m (49 13 lb in)
Illustration 3 g01224294
(10) Tighten the fitting for the fuel inlet port to the following torque. ... 17.5 2 N m (13 1.5 lb ft) (11) Tighten the fitting for the fuel outlet port to the following torque. ... 17.5 2.0 N m (12.9 1.5 lb ft) (12) Tighten the two bolts to the following torque. ... 24.5 2.5 N m (18.1 1.9 lb ft)