The ATC 85109245 Crankshaft Turning Barring Tool (also known as a cranking adapter) is designed to permit controlled rotation of the crankshaft from the front of the engine. It provides a reliable and safe method for turning the engine during service, maintenance, timing, inspection, or alignment procedures. This tool is used across Volvo D11 / D13 (and similar) and Mack MP7 / MP8 platforms.
Because it engages the crank pulley or front housing, the 85109245 adapter avoids slippage and ensures precise rotation in single-degree increments. That precision is crucial for tasks such as setting timing, installing cams, checking piston positions, and verifying engine balance.
Key Features & Benefits
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Engineered for Volvo & Mack heavy-duty engines (e.g. Volvo D11, D13, Mack MP7/MP8)
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Front-engine crank turning via the crank pulley or adapter boss
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Enables precise, safe engine rotation without using starter or risking damage
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Durable construction for repeated shop use
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Ideal for mechanics, rebuild shops, fleet service, and heavy equipment maintenance
Typical Applications
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Manual engine rotation during head service, timing gear installation, or camshaft alignment
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Inspection of piston positions or compression stroke when the engine is disassembled
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Verification of top dead center (TDC) or cam phasing during tune-up
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Preventing engine damage by enabling controlled rotation instead of ad-hoc methods
Usage & Compatibility Notes
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This adapter must be properly seated in the crank cover, pulley hub, or bolt pattern per OEM instructions
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Use carefully and incrementally; avoid applying excessive torque
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Always confirm vehicle and engine compatibility prior to use
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Store and protect alignment surfaces to prevent wear or damage