A leaking rear main seal on a Paccar MX-11 can ground a truck and destroy shop margins. The ATC 1903058 kit provides the unyielding, concentric force needed for a flawless, leak-free seal replacement.

The Critical Margin of Crankshaft Sealing

On modern Paccar MX-11 diesel engines, managing crankshaft sealing zones is a high-stakes operation. Attempting to install or extract these heavy-duty seals using generic punches, flat drivers, or pry bars is a guaranteed failure path. If a seal is driven in cocked by even a single millimeter, or if the sensitive seal lip gets rolled during entry, oil will migrate past the barrier almost instantly. Worse, improvised tools can permanently score the precision-ground crankshaft surface, requiring an incredibly costly tear-down to repair. The ATC 1903058 kit establishes a rock-solid, concentric alignment guide system that pulls old seals cleanly and presses new ones to their exact OEM depth every time.

• Complete Dual-Zone Coverage – Houses both front and rear installer and remover tooling setups inside one unified, heavy-duty package.
• Targeted DAF/Paccar Match – Precision-machined to work flawlessly with DAF front crankshaft seals (1923376) and rear crankshaft seals (1923380).
• Absolute Depth Control – Mechanical stops guarantee that seals are pushed to the perfect factory-specified index depth, eliminating human error.
• Scoring Prevention Armor – Protects the delicate crankshaft sealing lips and engine casing surfaces from tool gouges or marks during service.
• Rugged Metal Tool Crib – A massive, heavy-duty 33.00 lbs shop master kit safely enclosed in a premium metal storage box to secure your investment on the shop floor.

Eliminate Warranty Rework at the Source

The ATC 1903058 Crankshaft Seal Service Kit is a non-negotiable asset for Kenworth and Peterbilt fleet centers, independent diesel rebuilder bays, and dedicated heavy-duty service networks. Stop risking expensive main-seal leaks—install with total absolute accuracy.

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