The ATC 151‑4832 / 221‑9777 Injector Cup Remover & Installer Kit is a comprehensive tool set designed for in-vehicle servicing of fuel injector sleeve cups on Caterpillar C7, C9 and 3126B engines. Replaces established OEM part numbers 151-4832 (remover) and 221-9777 (installer), this kit offers a dual-function solution for removing existing injector cups and installing new ones safely and accurately without removing the cylinder head.
Engineered for professional diesel service shops and heavy-duty rebuilders, the kit enables effective maintenance of HEUI-type injector systems (note: not compatible with MEUI mechanical-injection variants) by minimizing downtime, reducing head removal-related risks, and preserving bore and deck integrity.
Key Features & Benefits:
-
Dual-tool kit covering both removal and installation operations for injector sleeve cups.
-
Direct replacement for Caterpillar tool numbers 151-4832 and 221-9777.
-
Specifically designed for Cat C7, C9 and 3126B engine families, servicing fuel injector cups (e.g., parts 227-1200, 227-291, 229-1490) in HEUI systems.
-
In-vehicle service capability allows removal/installation of injector cups without cylinder head removal—reducing labor and engine interruption.
-
Heavy-duty construction tailored for frequent use in shop environments; helps maintain precision bore alignment and avoids damage to engine components.
-
Ideal for service fleets, remanufacturing facilities and diesel engine specialists who require a reliable, all-in-one solution.
Applications:
Use this kit when performing injector sleeve cup replacement, injector servicing or diagnosing injector-related sealing or contamination issues on Cat C7, C9 or 3126B engines. Especially effective where cups are corroded, stuck or causing injector misalignment and coolant-fuel crossover issues.