Radiator Core for Caterpillar 320D, 323D, 324D & 329D Excavators | 3263870

Fits Models At A Glance:

• Caterpillar D Series Excavators: 320D, 320D FM, 320D GC, 320D L, 320D LN, 320D LRR, 320D RR, 323D L, 323D LN, 324D, 324D L, 325D, 325D L, 329D, 329D L

Serial Number Notes:

• 320D: A6F00001-UP, AZR00001-UP, BK800001-UP, BWZ00001-UP, BZP00001-UP, CXY00001-UP, DFT00001-UP, EBT00001-UP, FAL00001-UP, GKS00001-UP, GPX00001-UP, HS500001-UP, JFZ00001-UP, JGZ00001-UP, JPD00001-UP, JPG00001-UP, KLM00001-UP, MCH00001-UP, MZD00001-UP, SNS00001-UP
• 320D FM: BWW00001-UP, BZF00001-UP, CYZ00001-UP, EAX00001-UP, KHN00001-UP
• 320D GC: JZA00001-UP, KTF00001-UP, PCM00001-UP
• 320D L: A8F00001-UP, A9F00001-UP, BWP00001-UP, DFB00001-UP, DHK00001-UP, FNA00001-UP, GDP00001-UP, KGF00001-UP, KZF00001-UP, MDE00001-UP, MGG00001-UP, PHX00001-UP, SPN00001-UP, TDH00001-UP, WJN00001-UP
• 320D LN: KAF00001-UP, PCX00001-UP, WBN00001-UP
• 320D LRR: CWN00001-UP, DHE00001-UP, EBY00001-UP, EJT00001-UP, FXK00001-UP, HJC00001-UP, SCW00001-UP, TAE00001-UP, XCK00001-UP, ZGB00001-UP
• 320D RR: AMR00001-UP, GKL00001-UP, GMX00001-UP, PRR00001-UP, RBL00001-UP, SRT00001-UP, YDS00001-UP
• 323D L: BYM00001-UP, GTF00001-UP, JLG00001-UP, L5Z00001-UP, LFL00001-UP, NDE00001-UP, NZF00001-UP, PBE00001-UP, PBM00001-UP, PNA00001-UP, SDC00001-UP, WGC00001-UP, YSD00001-UP, ZMF00001-UP
• 323D LN: CWG00001-UP, CYD00001-UP, DCJ00001-UP, FAW00001-UP, GRL00001-UP, GRN00001-UP, RAC00001-UP
• 323D SA: NES00001-UP
• 324D: AWN00001-UP, CJX00001-UP, ECH00001-UP, F6600001-UP, JZR00001-UP, LBW00001-UP, MND00001-UP, T2D00001-UP
• 324D FM: JGK00001-UP
• 324D FM LL: JLS00001-UP
• 324D L: BTK00001-UP, BYE00001-UP, DFP00001-UP, GPK00001-UP, JAT00001-UP, JJG00001-UP, LAB00001-UP, PYT00001-UP, SYM00001-UP, TSN00001-UP
• 324D LN: EJC00001-UP, KJR00001-UP, M4A00001-UP, TRH00001-UP
• 325D: C3N00001-UP, CJM00001-UP, DAP00001-UP, DBH00001-UP, GPB00001-UP, KDG00001-UP, PKE00001-UP
• 325D FM: C7K00001-UP, C8L00001-UP
• 325D FM LL: C9M00001-UP
• 325D L: A3R00001-UP, AZP00001-UP, CYW00001-UP, ERK00001-UP, GBR00001-UP, H3N00001-UP, JCL00001-UP, KBE00001-UP, LAL00001-UP, MCL00001-UP, NAC00001-UP, PAL00001-UP, PEH00001-UP, SCR00001-UP, SRC00001-UP, T2S00001-UP, X3N00001-UP
• 325D MH: C4H00001-UP, RJK00001-UP
• 329D: BBF00001-UP, BYS00001-UP, DTZ00001-UP, WDK00001-UP
• 329D L: BFC00001-UP, CZF00001-UP, DJF00001-UP, J8D00001-UP, J9D00001-UP, JHJ00001-UP, L5G00001-UP, L5H00001-UP, LFW00001-UP, LGN00001-UP, MNB00001-UP, RSK00001-UP, TAY00001-UP, TPM00001-UP, TZL00001-UP, WLT00001-UP, XDB00001-UP, YFW00001-UP

Superseding & Cross-Reference Numbers:

• Caterpillar publishes no replacement or superseding number for 326-3870.
• 2459359 (Caterpillar 245-9359) is the radiator core for the larger 330D, 336D and 340D machines, stocked separately. The two cores are different sizes and are not interchangeable.

Key Notes:

• Part Number: 3263870 (Caterpillar reference 326-3870)
• Type: Radiator core - core only, no tanks or frame
• Dimensions: 1283 mm x 272 mm
• Material: Alloy aluminium
• Weight: 95.0 lbs.
• Condition: Aftermarket replacement part
• Application: Replaces the radiator core on Caterpillar D Series hydraulic excavators from the 320D through the 329D L
• Shipping Restrictions: Ships to the lower 48 US states only
• Note: Core only - tanks, side frames, hoses and hardware are not included. This is a wide shallow stacked-pack element at 1283 mm long and 272 mm high; the oil cooler in the same pack is a different part. Ships LTL freight; inspect fins and tube ends on arrival.

Common Use Case or Symptoms:

Replace this when a D Series machine climbs the gauge with the fan clutch proven and the pack blown out, or when the core is seeping at a header - in a stacked pack the coolant element sits behind the others, so it collects the fine dust that a wash does not reach.

Why Choose Broken Tractor?

• ✅ Fifteen Machine Coverage: One core covers the whole 320D range plus the 323D, 324D, 325D and 329D families.
• ✅ Stacked Pack Geometry: 1283 by 272 mm - the shape that identifies a pack element rather than a conventional radiator.
• ✅ Larger Machines Use Another: The 330D and up take a different core, and the listing names it so a mixed fleet orders correctly.