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Why the ATC37720 Kit is Vital for Mack E6, E7 & E9 Cam Swaps
Prevent dropped tappets and streamline commercial truck camshaft service with modular locking security.
Slipping a massive camshaft out of a Mack E7 engine block is a high-stakes job. If a single roller lifter drops into the oil pan mid-procedure, a fast top-end repair instantly transforms into a total oil pan teardown. The ATC37720 Holding Kit eliminates the gamble.
The Crucial Physics of Heavy-Duty Tappet Retention
On classic Mack E6, E7, and E9 diesel engine architectures, the heavy roller lifters ride directly on the camshaft lobes deep within the cylinder block crankcase channels. When executing an in-frame overhaul or replacing a worn camshaft, you must find a way to overcome gravity and keep those lifters suspended completely out of the way. Relying on improvised hooks, magnets, or tape is an absolute trap—these makeshift rigs can slip under the heavy weight of industrial lifters. If a lifter drops into the bottom oil pan or binds inside the inner casting tracks, you risk chipping precision components or scratching the lifter bore wall permanently. The ATC37720 kit completely bypasses this diagnostic risk. By deploying specialized two-piece modular rods that thread together, it allows techs to navigate tight clearances and lock all lifters flatly and securely above the cam lobes.
- Innovative 2-Piece Modular Rods – Threaded structural design engineered explicitly to fit and maneuver within ultra-tight Mack RD cab and sleeper-hood compartments.
- Direct OEM Factory Interchange – Designed to match original factory tool blueprints precisely, serving as a high-strength direct alternative to part number **J-37720C** / **J-37720-C**.
- Secure Friction-Grommet Locking – Includes high-durability locking grommets that slide down the shaft to keep the lifter suspended safely above the cam paths.
- Broad Mack Fleet Footprint – Comprehensive coverage tailored for legacy and workhorse Mack E6, E7, and high-displacement E9 engine families.
- Agile and Compact Mass – Weighing a solid 7.00 lbs, this premium tool array provides unyielding mechanical control without weighing down your master service cart.
Stop Fumbling with Magnets. Lock in absolute Valvetrain Security.
The ATC37720 Roller Lifter Tappet Holding Kit is a necessary asset for commercial transit centers, heavy vocational truck yards, and independent diesel machine shops. Keep your valvetrain organized, protect your camshaft surfaces, and secure fast-lane overhaul turnaround speeds with Apex.
Positive Lifter Suspension. Error-Free Camshaft Extraction.
Order the Mack Lifter Kit – $580.00Technical Specifications
| Technical Parameter | Value / Compatibility Guidelines |
|---|---|
| Engine Family Footprint | Mack Trucks Mechanical & Electronic E6, E7, and E9 Engines |
| Shaft Configuration | 2-Piece Threaded Modular Rod Assembly (Optimized for narrow cab clearance) |
| OEM Cross-Reference Codes | Direct modern aftermarket equivalent to factory part number J-37720C |
| Retention System | High-friction structural sliding grommet stops |
| Primary Application Focus | In-frame camshaft removal, top-end overhauls, and valvetrain diagnostics |
| Total Shipping Weight | 7.00 lbs (Dense, high-durability tool steel components) |
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