CORE AS-OIL COOLER 2W9978 - Caterpillar

2W9978 CORE AS-OIL COOLER Caterpillar parts 12H, 12H ES, 12H NA, 140G, 140H, 140H ES, 140H NA, 143H, 160H, 160H ES, 160H NA, 163H NA, 1673C, 3176B, 3176C, 3196, 3304, 3306, 3306C, 518C, 578, 583R, 589, 65C, 75, 75C, 75D, 85C, 85D, C-10, C-12, C...

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Rating:

120

Alternative (cross code) number:
CA2W9978
2W-9978
2W9978

Weight: 20 pounds 9 kg.

Buy CORE AS-OIL COOLER 2W9978 Caterpillar genuine, new aftermarket tractor parts with delivery
CHALLENGER, WHEEL SKIDDER,

Related part:

2W9978 CORE AS-YM 2794983 CL

2W9978 CORE AS-OCLR 0R5515 R

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One New Oil Cooler Core Fits CAT, Fits Caterpillar 120, 12F, 140, 14E, 235B, 3304, 3306, D5, D5B, D6C, D6D, D7G, D7H, D8L, D9H, D9L Models Interchangeable with 2W8655, 2W9978, 2Y2070, 2Y5229, 5

$382.99

18 Oct 2025
21.4[9.63] pounds
US: RAParts Inc.

One New Oil Cooler Core Fits CAT, Fits Caterpillar 120, 12F, 140, 14E, 235B, 3304, 3306, D5, D5B, D6C, D6D, D7G, D7H, D8L, D9H, D9L Models Interchangeable with 2W8655, 2W9978, 2Y2070, 2Y5229, 5
Stevens Lake Parts Replaces Part Numbers: 2W9978, 2794983, 6N9851, 2Y5229, 5S3414, 0R5515, 2Y2070, 2W8655, V2W9978 || 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 5S3414 Oil Cooler Core Assy 2W9978 2W8655 6N9851 5S3413 0R5515 2Y2070 2Y5229

$382.99

18 Oct 2025
21.4[9.63] pounds
US: RAParts Inc.

RAParts 5S3414 Oil Cooler Core Assy 2W9978 2W8655 6N9851 5S3413 0R5515 2Y2070 2Y5229
Reliable Aftermarket Parts One New Aftermarket Replacement Oil Cooler Core || Fits Challenger: 65C, 65D, 75C, 75D, 85C, 85D || Fits Engine - Machine: 3176, 3176C, 3196, 3304 || Replaces Part Number(s): 2W9978, 2W8655, 6N9851, 5S3413 || OEM Numbers Are Provided for Reference Only. Please Verify Fit Prior To Ordering.

MURNELAP for Oil Cooler Core Fits CAT Fits Caterpillar 120 12F 140 14E 235B 3304 3306 D5 D5B

$582.61

18 Oct 2025

US: S Logistics Don

MURNELAP for Oil Cooler Core Fits CAT Fits Caterpillar 120 12F 140 14E 235B 3304 3306 D5 D5B
MURNELAP For Oil Cooler Core Fits CAT Fits Caterpillar 120 12F 140 14E 235B 3304 3306 D5 D5B || Oil cooler core desied to fit mode 20, 2F, 40, 4E, 23B, 3304, and 3306, ering optimal oil cooling perforce. || Cpatible with D and DB mode, this oil cooler core provides a reliable and efficient cooling solution for your equipment. || Ensures consistent and dependable operation of your lawn mower. || Verify Fit: For optimal performance, please review the product's appearance in the photo and verify it against the specified dimensions to ensure a precise fit.

Show more prices Caterpillar parts

This part in 3 request: Show. This information for suppliers only!

#1372882 2W9978

2024-06-12

#978586 2w-9978

2022-09-27

#11956 2W9978

2016-08-19

Number on catalog scheme: 7

Caterpillar 2W9978 Parts scheme CORE AS-OIL COOLER

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Compatible equipment models: 2W9978:

CHALLENGER 65C 75 75C 75D 85C 85D

INDUSTRIAL ENGINE 3176B 3176C 3196 3304 3306 C-10 C-12

LOAD HAUL DUMP R1600

MARINE ENGINE 3196 C-12 C12

MOTOR GRADER 12H 12H ES 12H NA 140G 140H 140H ES 140H NA 143H 160H 160H ES 160H NA 163H NA

PIPELAYER 578 583R 589

TRACK-TYPE TRACTOR D10N D10R D10T D6D D6H D8L D9L D9N

TRUCK ENGINE 1673C 3306 3306C

WHEEL SKIDDER 518C Caterpillar

Information:

Check the coolant level when the engine is stopped and cool.
Illustration 1 g06268861
Typical radiator cooling system coolant level configurations.
(1) Coolant level sensor
(2) Cooling system filler
Pressurized System: Hot coolant can cause serious burns. To open the cooling system filler cap, stop the engine and wait until the cooling system components are cool. Loosen the cooling system pressure cap slowly in order to relieve the pressure.
Remove the cooling system filler cap slowly to relieve pressure.
Maintain the coolant level within 13 mm (0.5 inch) of the bottom of the filler pipe. If the engine is equipped with a sight glass, maintain the coolant level to the proper level in the sight glass.
Illustration 2 g00103639
Typical filler cap gaskets
Clean the cooling system filler cap and check the condition of the filler cap gaskets. Replace the cooling system filler cap if the filler cap gaskets are damaged. Reinstall the cooling system filler cap.
Inspect the cooling system for leaks.

Cat SIS web machinery list:

Caterpillar parts catalog
Product:

3306 Truck Engine 76R02779-UP

7N-6034: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP12020199
7N-6045: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP12020200

3304 Industrial Engine 10E00300-UP

3N-7688: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP14000223

3306 Truck Engine 63Z00001-22741

7E-0430: COOLER GP-TRANSMISSION OIL » SEBP14760428
7N-6034: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP14760429
7N-6045: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP14760430

3306 Industrial Engine 66D49919-UP

7N-6045: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP19670178

3306C Truck Engine 7RJ00001-UP

102-9860: COOLER GP-TRANSMISSION OIL » SEBP19900222
7E-0430: COOLER GP-TRANSMISSION OIL » SEBP19900223
7N-6034: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP19900224
7N-6045: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP19900225

3304 Industrial Engine 02B17737-UP

3N-7688: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP21560131

3306B Truck Engine 63Z22742-UP

7E-0430: COOLER GP-TRANSMISSION OIL » SEBP21820194
7N-6034: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP21820195
7N-6045: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP21820196

3176B Industrial Engine 3NL00001-UP

136-2282: COOLER GP-TRANSMISSION OIL » SEBP22260192
4P-3757: COOLER GP-TRANSMISSION OIL » SEBP22260193

3306C Truck Engine 9TL00001-UP

102-9860: COOLER GP-TRANSMISSION OIL » SEBP22690360
7E-0430: COOLER GP-TRANSMISSION OIL » SEBP22690361
7N-6034: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP22690362

3304 Industrial Engine 04B26769-UP

3N-7688: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP23060137

3196 Marine Engine 2XR00001-UP

177-3617: COOLER GP-OIL » (MARINE TRANSMISSION) SEBP25630136

3196 Industrial Engine 1DW00001-UP

123-0809: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP26980273

3176C Industrial Engine 2AW00001-UP

123-0809: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP27080326

C-10 Industrial Engine BCX00001-UP

123-0809: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP32510300

C-12 Industrial Engine BDL00001-UP

123-0809: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP32520272

C-12 Marine Engine 9HP00001-UP

177-3617: COOLER GP-OIL » (MARINE TRANSMISSION) SEBP35540168

C12 Marine Engine C1Z00001-UP

177-3617: COOLER GP-OIL » (MARINE TRANSMISSION) SEBP40020199

589 Track-Type Pipelayer Power Shift 31Z00001-UP (MACHINE) POWERED BY 3408 Engine

8N-0744: COOLER GP-HYDRAULIC OIL » SEBP16300422

140H NA Motor Grader 2ZK00001-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP22740378

143H Motor Grader 1AL00001-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP22750378

160H Motor Grader 9EJ00001-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP22760386

163H Motor Grader 5AK00001-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP22770373

Challenger 75C Agricultural Tractor 4KK01000-UP (MACHINE) POWERED BY 3176 Engine

4P-3757: COOLER GP-TRANSMISSION OIL » SEBP23180216

Challenger 85C Agricultural Tractor 9TK01000-UP (MACHINE) POWERED BY 3176 Engine

4P-3757: COOLER GP-TRANSMISSION OIL » SEBP23190218

12H Motor Grader 4XM00001-UP (MACHINE) POWERED BY 3306B Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP24210330

12H Motor Grader 2LR00001-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP24230291

140H Motor Grader 8KM00001-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP24260338

160H Motor Grader 6WM00001-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP24270304

Challenger 65D Agricultural Tractor 2ZJ01965-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP24400201

12H Motor Grader 5ZM00001-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP24810236

140H Motor Grader 8JM00001-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP24820229

160H Motor Grader 9JM00001-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP24830241

12H NA Motor Grader 2WR00001-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP25420231

140H Motor Grader 9ZN00001-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP25430224

Challenger 75D Agricultural Tractor 5AR00001-UP (MACHINE) POWERED BY 3176C Engine

123-0809: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP25830205

Challenger 85D Agricultural Tractor 4GR00001-UP (MACHINE) POWERED BY 3196 Engine

123-0809: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP25840186

583R Track-Type Pipelayer 2XS00001-UP (MACHINE) POWERED BY 3406C Engine

142-1789: LINES GP-WATER » SEBP27390089

12H Motor Grader XZJ00001-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP41060165

160H Motor Grader XZK00001-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP41070166

140H Motor Grader XZH00001-UP (MACHINE) POWERED BY 3306 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP42520168

3306 DI Engine Emissions Retrofit Repower Tier I For 140G Motor Grader 72V00001-UP (MACHINE)

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP53070098

3306 DI Engine Emissions Retrofit Repower Tier I For 140G Motor Grader 13W00001-UP (MACHINE)

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP53080085

3406 Engine Emissions Upgrade Group Retrofit Tier I Equivalent Level for 578 Pipelayer Tractor 8HB00001-UP (MACHINE)

142-1789: LINES GP-WATER » SEBP55950050
321-3003: KIT-ENGINE PARTS » (ENGINE) SEBP55950085

3306 Engine Rebuild Kit & Related Parts for 143H, 140H,12H, 140G, 160H, 12G, 14G Motorgrader 1AL00001-UP (MACHINE)

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP64950210

3306 Engine Rebuild Kit & Related Parts for 12H, 140H, 160H Motorgrader XZH00001-UP (MACHINE)

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP64970126

3306 Engine Rebuild Kit & Related Parts for 12G, 12H, 140G, 140H Motorgrader 13W00001-UP (MACHINE)

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP64980158

3306 Engine Rebuild Kit & Related Parts for 140H, 160H Motorgrader 3FR00001-UP (MACHINE)

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP64990085

D6H Series II Track-Type Tractor Direct Drive 1FJ04000-UP (MACHINE) POWERED BY 3306 Engine

1W-3420: COOLER GP-TRANSMISSION OIL » SEBP19190214
4W-5974: COOLER GP-TRANSMISSION OIL » SEBP19190215

518C Grapple Skidder 9HJ00001-UP (MACHINE) POWERED BY 3304 Engine

4W-5974: COOLER GP-TRANSMISSION OIL » (TRANSMISSION) SEBP20170181

D10N Track-Type Tractor 3SK00001-UP (MACHINE) POWERED BY 3412 Engine

8N-0744: COOLER GP-HYDRAULIC OIL » SEBP22370330

D10R Track-Type Tractor 3KR00001-UP (MACHINE) POWERED BY 3412 Engine

135-3704: COOLER GP-HYDRAULIC OIL » (TRANSMISSION) SEBP24780630
8N-0744: COOLER GP-HYDRAULIC OIL » SEBP24780631

D10R TRACK-TYPE TRACTOR AKT00001-UP (MACHINE) POWERED BY 3412E Engine

166-5436: LINES GP-WATER » (HYDRAULIC) SEBP30860087

D10T TRACK-TYPE TRACTOR RJG00001-UP (MACHINE) POWERED BY C27 Engine

214-6665: COOLER GP-HYDRAULIC OIL » (ENGINE) SEBP36551070

3408E Engine Emissions Repower Tier II For D9N Tractor 1JD00001-UP (MACHINE)

285-7343: LINES GP-WATER » (ENGINE) SEBP43860064

3412E Engine Emissions Retrofit Repower Tier II For D10N 2YD00001-UP (MACHINE)

166-5436: LINES GP-WATER » (HYDRAULIC) SEBP43870064

3412E Engine Emissions Retrofit Repower Tier I For D10N Tractor 2YD00001-UP (MACHINE)

135-3704: COOLER GP-HYDRAULIC OIL » (TRANSMISSION) SEBP52980119

3412E Engine Emissions Retrofit Repower Tier I For D9L Tractor 14Y00001-UP (MACHINE)

135-3704: COOLER GP-HYDRAULIC OIL » (TRANSMISSION) SEBP52990120

C27 Engine Emissions Retrofit Repower Tier III For D10R Tractor 3KR00001-UP (MACHINE)

455-1867: KIT-ENGINE CONVERSION » SEBP53010045
214-6665: COOLER GP-HYDRAULIC OIL » (ENGINE) SEBP53010201

C27 Engine Emissions Retrofit Repower Tier III For D10N Tractor 2YD00001-UP (MACHINE)

453-1028: KIT-ENGINE CONVERSION » (HYDRAULIC) SEBP53020046
459-6792: KIT-ENGINE CONVERSION » SEBP53020047
214-6665: COOLER GP-HYDRAULIC OIL » (ENGINE) SEBP53020214

Parts core Caterpillar catalog:

6I2433 CORE AS-RADIATOR
D8L, D9N, D9R

1194774 CORE AS-RADIATOR
24H, D10N, D10R, D8L, D9N, D9R

1634057 CORE AS-RADIATOR
D10T, D9R

2562090 CORE AS-RADIATOR
D10N, D10R, D10T, D9R, D9T

7N3112 CORE AS-RADIATOR
D8L

4W5412 CORE GP-OIL COOLER
D10N, D10R, D10T, D9L

2139906 CORE AS-RADIATOR
D10N, D10R, D10T, D9T

2679441 CORE AS-AFTERCOOLER
D10N, D10R, D10T

2679442 CORE AS-AFTERCOOLER
D10N, D10R, D10T

2047184 CORE AS-RADIATOR
D10T

7N2191 CORE ASSEM.
D9L

2190018 CORE AS-CONDENSER
12H ES, 12H NA, 140H ES, 140H NA, 14H NA, 160H ES, 160H NA, 16H NA

6I3297 CORE AS-RADIATOR
3176B, 3176C, 3196, 637E, 75C, 75D, 85C, 85D, 85E, 95E, C-10, C-12

2W5539 CORE AS-RADIATOR
3176B, 627E, 627F, 627G, 637E, 637G, 65, 65C, 65E, 75, 75C, 75D, 75E, 789C, 793, 793B, 793C, 950B

6I0735 CORE AS-HYDRAULIC OIL COOLER
65C, 75C, 75D, 85C, 85D

4P3754 CORE AS-OIL COOLER
3176, 3176B, 3176C, 75, 75C, 85C, C-10, C-12, R1700 II

1176849 CORE AS-HEATER
45, 55

1111787 CORE AS-OIL COOLER
35, 45, 55

1134941 CORE AS-OIL COOLER
416C, 426C, 428C, 436C, 438C

1403639 CORE AS
416C, 416D, 420D, 424D, 426C, 428C, 428D, 430D, 432D, 436C, 438C, 438D, 442D

1403635 CORE AS
416C, 416D, 420D, 424D, 426C, 428C, 428D, 430D, 432D, 436C, 438C, 438D, 442D

1308525 CORE AS
TH62

8N6943 CORE AS-HYDRAULIC OIL COOLER
613C, 615, 793B, 814B, 816B, 85C, 85D, 963, 973

1753185 CORE-VALVE
120H NA, 12G, 12H ES, 12H NA, 130G, 135H NA, 140G, 140H ES, 140H NA, 143H, 14G, 14H NA, 160G, 160H ES, 160H NA, 163H NA, 16G, 16H NA, 24H, 578, 589, 611, 615C, 621E, 621F, 621G, 623E, 623F, 623G, 627E...

2w9978