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Extracting carbon-baked stainless steel or copper injector sleeve cups from a Mack MP-series or Volvo FM12/D13 heavy-duty diesel cylinder head? Attempting to pry out stubborn injector cups using heel bars, slide hammers, or worn puller jaws is an immediate recipe for scored cylinder head bores, cracked copper landings, and catastrophic coolant-in-oil contamination. The ATC 88800387 Replacement Cup Puller delivers 100% concentric thread-and-collet engagement to draw stuck cups straight up along a dead-parallel vertical axis line directly in-frame.

The Critical Engineering of Mack & Volvo Injector Sleeve Cup Extraction

On modern Volvo D11, D13, D16, FM12, and Mack MP7, MP8, MP9, and MP10 engines, the electronic unit injector sits encased inside a thin-walled copper or stainless steel sleeve cup within the cylinder head deck. This cup forms the critical seal between high-pressure fuel circuits, combustion chamber gas, and the surrounding engine coolant jacket. Over hundreds of thousands of heavy-haul transport miles, severe thermal cycling and carbon blow-by fuse the injector cup tightly into its cast-iron head bore well. When a sleeve degrades—causing fuel-in-coolant crossover or misfires—removing the cup without pulling the cylinder head is the only way to protect repair margins. However, utilizing improvised pullers or damaged collets is extremely dangerous. Off-axis leverage concentrates immense side loads on the delicate lower bore landing, gouging the cast-iron sealing seat or snapping the puller mandrel inside the head well. The ATC 88800387 Replacement Puller completely eliminates this high-risk scenario. Precision-machined to match original equipment dimensions, this replacement puller collet threads directly into the interior wall of the sleeve cup, giving your master puller bridge a rock-solid, concentric jaw grip that lifts sleeves straight up without tilting, binding, or scoring the cylinder head.

• Broad Volvo & Mack Application Footprint – Engineered specifically for Volvo FM12, D11, D13, D16 and Mack MP7, MP8, MP9, MP10 engine families.
• Direct OEM Factory Tool Interchange – High-strength direct replacement component for Volvo/Mack factory tool code **88800387**.
• In-Vehicle Head Protection Safeguard – Extracts carbon-seized copper and stainless steel cups directly on-chassis without removing the cylinder head.
• 360-Degree Collet Thread Engagement – Locks securely into the sleeve wall to prevent jaw slip-outs, broken threads, or bore landing damage.
• High-Mass Industrial Tool Steel Alloy – Heavy-duty 2.00 lbs heat-treated steel module designed to endure continuous extraction torque in busy commercial shops.

Stop Risking Damaged Head Bores. Command Total Mack & Volvo In-Frame Service Speed.

The ATC 88800387 Replacement Cup Puller is an essential replacement asset for commercial truck service centers, fleet maintenance depots, Volvo/Mack dealer bays, and mobile diesel field technicians. Save thousands in labor costs, replace worn puller jaws, and extract injector sleeves with complete mechanical authority using Apex.

Technical Specifications

Technical Metric	Value / Fitment Reference Guidelines
Target Engine Platforms	Volvo FM12, D11, D13, D16 & Mack MP7, MP8, MP9, MP10 Engines
Primary Operational Function	Collet-threaded extraction of copper and stainless steel injector sleeve cups
OEM Special Tool Cross Reference	Direct functional replacement for Volvo / Mack OEM part # 88800387
Part / Model Reference Number	ATC 88800387 (ATC88800387)
Construction Metallurgy	Heat-treated high-tensile structural shop tool steel alloy
Total Package Shipping Weight	2.00 lbs (Dense, high-strength professional shop tool mandrel)

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