Mack ATC37720 Roller Lifter Tappet Holding Kit for use on the Mack E6, E7 & E9,
The ATC 37720C the rods should be screwed together. They are manufactured in 2 parts to allow for use in tight fit RD Cabs To Use: Lower the rods into the push rod opening until contact is made with the roller lifter/tappet. Slowly lift the tool slightly until the lifter/tappet clears the camshaft lobe. Slide the grommet (included) down the shaft to hold the rod up. Repeat on all cylinders. The camshaft is now ready for removal. Always refer to your service manual for most up to date instructions. Equivalent to J-37720-CThe ATC 37720 Roller Lifter & Tappet Holding Kit (equivalent to J-37720C) is a specialized engine service tool designed to securely hold roller lifters and tappets out of the engine block during maintenance, overhaul, or component replacement on Mack Trucks E6, E7, and E9 diesel engines. Proper retention of lifters and tappets is essential when performing tasks such as camshaft removal, rocker arm service, or top-end inspection. Without a designated holding kit, components can fall into bores, become damaged, or be misinstalled—leading to costly rework and downtime.
This kit consists of purpose-designed fixtures and retainers that engage lifters and tappets securely, allowing technicians to remove and install camshafts, pushrods, and rocker assemblies with confidence. Rather than improvising with magnets, tape, or loose storage, the ATC 37720 ensures components are held in an organized, stable manner throughout teardown and reassembly.
Perfect for professional diesel repair shops, fleet maintenance facilities, and engine rebuild operations, this holding kit improves workflow, reduces the risk of lost or damaged parts, and supports accurate engine reassembly to manufacturer specifications.
Key Features & Benefits
-
Engine-Specific Design: Tailored for Mack E6, E7, and E9 roller lifter and tappet service
-
Secure Component Retention: Holds lifters and tappets out of the way during camshaft and rocker work
-
Prevents Damage & Loss: Reduces the risk of dropping components into lifter bores
-
Improves Service Efficiency: Organizes parts for fast, accurate reassembly
-
Professional-Grade Construction: Built for repeated use in heavy-duty shop environments
-
OEM-Style Functionality: Matches the intent of factory tools such as J-37720C
Typical Applications
-
Lifters and tappet retention during camshaft removal or installation
-
Top-end service, rocker arm replacement, and valve train repair
-
Engine overhaul, valve adjustment, and diagnostic procedures
-
Fleet and heavy truck maintenance shops
Why It Matters
Roller lifters and tappets are costly precision components in heavy-duty diesel engines, and misplacing or damaging them during service can lead to engine performance issues, accelerated wear, or rework delays. The ATC 37720 Holding Kit ensures that lifters and tappets remain stable and organized throughout the entire top-end service process, enabling professional technicians to work cleanly, efficiently, and with confidence.
The ATC 37720 Roller Lifter & Tappet Holding Kit (equivalent to J-37720C) is a specialized engine service tool designed to securely hold roller lifters and tappets out of the engine block during maintenance, overhaul, or component replacement on Mack Trucks E6, E7, and E9 diesel engines. Proper retention of lifters and tappets is essential when performing tasks such as camshaft removal, rocker arm service, or top-end inspection. Without a designated holding kit, components can fall into bores, become damaged, or be misinstalled—leading to costly rework and downtime.
This kit consists of purpose-designed fixtures and retainers that engage lifters and tappets securely, allowing technicians to remove and install camshafts, pushrods, and rocker assemblies with confidence. Rather than improvising with magnets, tape, or loose storage, the ATC 37720 ensures components are held in an organized, stable manner throughout teardown and reassembly.
Perfect for professional diesel repair shops, fleet maintenance facilities, and engine rebuild operations, this holding kit improves workflow, reduces the risk of lost or damaged parts, and supports accurate engine reassembly to manufacturer specifications.
Key Features & Benefits
-
Engine-Specific Design: Tailored for Mack E6, E7, and E9 roller lifter and tappet service
-
Secure Component Retention: Holds lifters and tappets out of the way during camshaft and rocker work
-
Prevents Damage & Loss: Reduces the risk of dropping components into lifter bores
-
Improves Service Efficiency: Organizes parts for fast, accurate reassembly
-
Professional-Grade Construction: Built for repeated use in heavy-duty shop environments
-
OEM-Style Functionality: Matches the intent of factory tools such as J-37720C
Typical Applications
-
Lifters and tappet retention during camshaft removal or installation
-
Top-end service, rocker arm replacement, and valve train repair
-
Engine overhaul, valve adjustment, and diagnostic procedures
-
Fleet and heavy truck maintenance shops
Why It Matters
Roller lifters and tappets are costly precision components in heavy-duty diesel engines, and misplacing or damaging them during service can lead to engine performance issues, accelerated wear, or rework delays. The ATC 37720 Holding Kit ensures that lifters and tappets remain stable and organized throughout the entire top-end service process, enabling professional technicians to work cleanly, efficiently, and with confidence.