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Replacing fuel injector brass sleeves or copper tubes on classic International Harvester, Navistar, and IHC mechanical 12-valve engines (DT466, DT360, DT408, DT530)? Attempting to pry out baked brass cups using cold chisels or driving replacement sleeves using improvised flat punches deforms sleeve walls, carves deep gouges into cylinder head bores, and ruins lower fluid seals. This leads directly to coolant washing into fuel tanks or combustion blow-by destroying injectors. The ATC ZTSE2587C Master Tool Kit combines the functionality of OEM numbers ZTSE2534A and ZTSE2587A to provide 100% straight-line thread-puller extraction and expansion-driver seating, protecting cylinder head castings across legacy 12-valve mechanical diesel fleets.

The Critical Physics of Mechanical 12-Valve Brass Sleeve Seating & Thermal Isolation

Legacy International Harvester 12-valve mechanical injection engines—such as the iconic DT466, DT360, D414, D436, and DT530 platforms—utilize pressed brass injector sleeves (also referred to as fuel tubes or cups) to isolate mechanical fuel injectors from high-pressure engine coolant passages inside the cylinder head. These brass cups form a vital thermal barrier while sealing coolant away from the combustion chamber and valve train. Over thousands of heavy agricultural, industrial, or medium-duty truck operating hours, intense thermal cycling and coolant cavitation degrade the sleeve landing, resulting in coolant contamination in fuel or combustion gas aeration in the radiator. When servicing these heads, removing old, carbon-baked brass sleeves without scratching the cast-iron cylinder head landing is critical. Using makeshift pry bars or screwdrivers gouges the internal head bore landing; when a new sleeve is installed over a gouged landing, coolant leaks past the sleeve instantly. Furthermore, replacement brass sleeves require controlled expansion driving to flare the bottom edge into the head counterbore cleanly. The ATC ZTSE2587C tool kit completely eliminates these top-end service risks. Engineered as a direct 2-in-1 replacement for factory tools **ZTSE2534A** (remover) and **ZTSE2587A** (installer), this 5.00-pound master kit includes a coarse-thread tap mandrel puller that grips old sleeves internally for straight axial extraction, paired with a precision driver mandrel that seats fresh sleeves flat and swages lower rims to OEM factory depth without wall distortion.

• Broad IHC / Navistar 12-Valve Engine Fitment – Purpose-built for 2-valve per cylinder mechanical injection platforms: DT360 (5.9L), DT408 (6.7L), D414 (6.8L), D436 (7.1L), DT466 / DTA466 (7.6L), and DT530 (8.7L).
• Direct OEM Factory Tool Interchange – Master combination replacing Navistar/IHC OEM part numbers **ZTSE2587C**, **ZTSE2534A** (17-25-13 remover), and **ZTSE2587A** (04-148-3 installer).
• Multi-Vendor Sleeve Compatibility – Cross-referenced for installing popular aftermarket and OEM sleeve part numbers: Navistar **675442C1**, Irontite **448679461**, SBI **240-1024**, and Silver Seal **719461**.
• Zero Cylinder Head Bore Damage Guarantee – Thread-locking extraction and piloted driver swaging protect cast-iron head landings from scoring or distortion.
• Essential Master Kit for Agriculture & Fleet Shops – Substantial 5.00 lbs solid steel construction built for continuous daily use in tractor overhaul bays and truck repair stalls.

Stop Prying Brass Sleeves. Command Total Mechanical Top-End Service Precision.

The ATC ZTSE2587C International Injector Sleeve Removal & Installation Tool Kit is an indispensable capital asset for agricultural equipment mechanics, commercial fleet service centers, engine rebuilders, and Navistar repair specialists. Prevent coolant leaks, protect cylinder head castings, and service 12-valve mechanical sleeves with complete mechanical authority using Apex tools.

Technical Specifications

Technical Metric	Value / Fitment Reference Guidelines
Target Engine Platforms	IHC / Navistar 12-Valve (2 per cyl) Mechanical Injection Engines (360, 408, 414, 436, 466, 530 CI)
Primary Operational Functions	Extraction of worn brass sleeves & precision driver seating/swaging of replacement cups
OEM & Vendor Cross References	ZTSE2587C, ZTSE2534A, ZTSE2587A | Navistar 675442C1, Irontite 448679461, SBI 240-1024
Part / Model Reference Number	ATC ZTSE2587C (ATCZTSE2587C / ZTSE2587C)
Application Tool Matrix Note	For 12V Mechanical only. (Use ST-182 for 12V Electronic; Use ST-252 for 24V Electronic)
Total Package Shipping Weight	5.00 lbs (Heavy-duty professional shop tool steel kit)

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