This is a 3/4" drive, 20mm 12-point lower idler gear socket designed for servicing the lower idler gear assembly on Navistar and International diesel engines.
Compatible with the following engines and applications:
Pre-2004 530E
Pre-2004 DT466E
2004–2007 570
2004–2007 DT466
2007 MaxxForce 10
2007 MaxxForce 9
2007 MaxxForce DT
2010 MaxxForce 10
2010 MaxxForce 9
2010 MaxxForce DT
2013 N10 w/SCR
2013 N9 w/SCR
AC / UC & HT / TC Commercial Bus
AE, BE, CE & Integrated Bus
CityStar / CF Series
CXT, MXT
DuraStar, EStar, LoadStar
RE Integrated Bus
TerraStar
WorkHorse
Base Engine
12 Engine System
This tool is a direct replacement for ZTSE-4383.
The ATC ZTSE4383 Lower Idler Gear Socket is a precision specialty tool engineered for use on Navistar and International diesel engines to remove and install the lower idler gear assembly during timing gear service or engine overhaul. The socket features a 3/4" drive with a 20mm 12-point design, allowing secure engagement with the idler gear fastener for safe and damage-free removal or installation.
The lower idler gear plays a critical role in the engine timing gear train by transferring rotational motion between the crankshaft, camshaft, and upper idler gears. During timing gear repairs or front engine service, this tool enables technicians to apply controlled torque and precise engagement without rounding fasteners or damaging surrounding components.
Key Features & Benefits
- Engine-specific design: Built for Navistar / International DT466, DT466E, 530, 530E, and MaxxForce timing gear service.
- Precision 12-point socket: 20mm profile with 3/4" drive provides secure engagement and minimizes fastener rounding.
- Heavy-duty construction: Manufactured from high-strength steel for repeated professional shop use.
- Protects engine components: Reduces the risk of damage to gear train bolts during removal and installation.
- Improves service efficiency: Accurate fit allows technicians to complete timing gear work faster and more reliably.
Typical Applications
- Removal and installation of the lower idler gear bolt during timing gear train service.
- Front engine overhauls, timing gear inspections, and component replacement.
- Diesel repair shops and fleet maintenance working on Navistar DT and MaxxForce engines.
- Professional engine rebuild facilities requiring specialized timing gear service tools.
Why It Matters
The lower idler gear is a critical component of the diesel engine timing system. Servicing this fastener requires a specialized socket to avoid damaging bolt heads or surrounding gear components. The ATC ZTSE4383 Lower Idler Gear Socket provides the exact fit and strength needed for safe, accurate service—helping technicians protect engine components and maintain proper timing gear operation.
This is a 3/4" drive, 20mm 12-point lower idler gear socket designed for servicing the lower idler gear assembly on Navistar and International diesel engines.
Compatible with the following engines and applications:
Pre-2004 530E
Pre-2004 DT466E
2004–2007 570
2004–2007 DT466
2007 MaxxForce 10
2007 MaxxForce 9
2007 MaxxForce DT
2010 MaxxForce 10
2010 MaxxForce 9
2010 MaxxForce DT
2013 N10 w/SCR
2013 N9 w/SCR
AC / UC & HT / TC Commercial Bus
AE, BE, CE & Integrated Bus
CityStar / CF Series
CXT, MXT
DuraStar, EStar, LoadStar
RE Integrated Bus
TerraStar
WorkHorse
Base Engine
12 Engine System
This tool is a direct replacement for ZTSE-4383.
The ATC ZTSE4383 Lower Idler Gear Socket is a precision specialty tool engineered for use on Navistar and International diesel engines to remove and install the lower idler gear assembly during timing gear service or engine overhaul. The socket features a 3/4" drive with a 20mm 12-point design, allowing secure engagement with the idler gear fastener for safe and damage-free removal or installation.
The lower idler gear plays a critical role in the engine timing gear train by transferring rotational motion between the crankshaft, camshaft, and upper idler gears. During timing gear repairs or front engine service, this tool enables technicians to apply controlled torque and precise engagement without rounding fasteners or damaging surrounding components.
Key Features & Benefits
- Engine-specific design: Built for Navistar / International DT466, DT466E, 530, 530E, and MaxxForce timing gear service.
- Precision 12-point socket: 20mm profile with 3/4" drive provides secure engagement and minimizes fastener rounding.
- Heavy-duty construction: Manufactured from high-strength steel for repeated professional shop use.
- Protects engine components: Reduces the risk of damage to gear train bolts during removal and installation.
- Improves service efficiency: Accurate fit allows technicians to complete timing gear work faster and more reliably.
Typical Applications
- Removal and installation of the lower idler gear bolt during timing gear train service.
- Front engine overhauls, timing gear inspections, and component replacement.
- Diesel repair shops and fleet maintenance working on Navistar DT and MaxxForce engines.
- Professional engine rebuild facilities requiring specialized timing gear service tools.
Why It Matters
The lower idler gear is a critical component of the diesel engine timing system. Servicing this fastener requires a specialized socket to avoid damaging bolt heads or surrounding gear components. The ATC ZTSE4383 Lower Idler Gear Socket provides the exact fit and strength needed for safe, accurate service—helping technicians protect engine components and maintain proper timing gear operation.