The ATC 85108855 Crank Turning (Barring) Tool is a precision adapter designed to safely and accurately rotate the crankshaft of Volvo D16 (and compatible Mack) engines during engine servicing. This tool enables controlled manual rotation by both a Ratchet or Wrench— allowing technicians to align piston positions, set timing marks, perform valve adjustments, or inspect internal components without starting the engine.
Constructed from hardened, shop-grade steel and machined to tight tolerances, the ATC 85108855 ensures a secure fit with crankshaft gear or flywheel interfaces, minimizing slippage and protecting engine surfaces during use. It is ideal for heavy-duty repair shops, drivetrain specialists, and fleet maintenance operations working on Volvo / Mack platforms.
Key Features & Benefits
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Designed for Volvo D16 / compatible Mack engine platforms
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Enables secure, controlled crankshaft rotation without using the starter Can be turned by breaker bar or wrench in tight places
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Ideal for timing, overhead adjustment, injector service, and inspection
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Hardened steel construction ensures durability and repeatability
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Prevents damage to crankcase, gears, or internal surfaces during use
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Useful in engine rebuild shops, heavy-duty maintenance, and diagnostic workflows
Application Notes & Compatibility
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Always ensure proper engagement with crank gear or bolt pattern before applying torque
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Rotate the engine gently, in small increments; avoid shock loading
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Store the tool carefully to protect its precision surfaces
Do not start truck with installed
This turning (barring) adapter is an essential accessory for professionals working on Volvo / Mack D16 engines, offering safer, more precise control during engine assembly or diagnostic procedures.