ATC10225A Shim cutter plate For Caterpillar 3406 3408 C-15 Shim Cutter Plate PT-2400-15A

This is a shim cutter plate, for use on CATERPILLAR 3406/3408 Series, and C-15. 5.4" Bore Fits Porta-Tool Cutter, M50133, & M50139. This is a replacement for part # PT 2400-15A

The ATC 10225A Shim Cutter Plate (also referenced as PT-2400-15A) is a heavy-duty machining accessory engineered for precision shim cutting and counterboring on Caterpillar 3406, 3408, and C-15 series diesel engines. Shim cutter plates are essential in top-deck engine work where liners, insert bushings, or over-sleeve surfaces must be machined to a true, flat plane for proper sealing and ring fit. The ATC 10225A provides a stable, accurate platform for cutting shim material or trimming surface features directly in the deck area, helping restore proper geometry and engine performance.

Over time and service cycles, deck surface irregularities, worn shim material, and slight distortion can compromise engine sealing surfaces. Using an improper tool or makeshift cutter can lead to uneven surfaces, poor sealing, gasket bleed-through, or oil/coolant leakage. The ATC 10225A Shim Cutter Plate is precision-engineered to ensure flat, concentric cuts that meet documented tolerances for cylinder head contact and liner seal integrity.

Constructed from high-strength, precision-machined steel, this shim cutter plate delivers professional-grade performance in engine rebuild facilities, diesel repair shops, and fleet maintenance operations—helping technicians achieve repeatable, accurate results when performing deck surface preparation or shim adjustments.

---

Key Features & Benefits

• Engine-specific design: Developed for Caterpillar 3406, 3408, and C-15 engine shim and deck cutting

• Precision machining platform: Ensures accurate shim cutting and counterbore work

• Professional-grade tooling: Durable construction for repeated heavy-duty shop use

• Improves sealing surfaces: Supports flat, true deck geometry for liner bore sealing

• Compatible with cutter bits: Works with replacement cutter bits (e.g., M10229-5 or equivalent)

• OEM-style alternative: Equivalent in function to PT-2400-15A shim cutter tooling

---

Typical Applications

• Deck surface preparation on Caterpillar 3406, 3408, and C-15 engines

• Shim cutting and trimming during engine top-end overhauls

• Counterboring operations for liner or sleeve services

• Diesel engine rebuilds and machine shop procedures

• Professional maintenance facilities and fleet service operations

---

Why It Matters

Accurate deck and shim surface preparation is critical for maintaining correct combustion chamber sealing, ring sealing performance, and overall engine durability. Inaccurate or uneven surfaces can lead to sealing failures, compression loss, or premature wear of critical components. The ATC 10225A Shim Cutter Plate provides technicians with a sturdy, precise platform to perform these machining tasks confidently and efficiently—reducing rework, improving sealing outcomes, and supporting long-term engine reliability.