Description
374000X – HYDROVAC (PISTON STYLE) 379474
PART NUMBER(S):
Fleet Products: 374000X (Remanufactured), 374000 (New) | Replaces OE: Clark 756251 | Navistar (IHC) 77180R91 | White 77180R91 | CARDONE 51-8028
DESCRIPTION:
Model: Piston-Style Hydrovac (Single Piston)
Vehicles: Dodge, IHC, Ford, GMC Trucks, Trailers, Busses, Tractors
• Diameter: 6-3/4"
• Overall Length: 14-1/2"
• Input Port: 1/2" - 20 Thread
• Output Port: 1/2" - 20 Thread
• Air Cleaner Port: 1/2"
• Vacuum Supply Port: 3/8" NPT
• End Cap: A or E
• Actuation Type: Vacuum-assisted hydraulic braking
Applications:
This 6-3/4" piston-style hydrovac brake booster is designed for use in medium- to heavy-duty hydraulic brake systems across trucks, trailers, buses, and tractors. It delivers precise vacuum-assisted braking, ideal for fleet service, agri-haul units, or urban-duty vehicles. Built to OE standards and sold as a new unit with no core exchange required.
CROSS-REFERENCE(S):
374000, 374000X, 2208488, 379474, PB-374000-R, RV379474X, 373853, 375698, 377215 | Other PB-374000-R, RV379474X, 379474, 2512139X, 3727820, 2512140X, 3761237, 2208488
A cross-reference listing means this part is functionally interchangeable with the given numbers but may differ in brand, appearance, or cost.
IMPORTANT INSTALLATION NOTES:
✔ Confirm thread compatibility: input/output are 1/2"-20, vacuum port is 3/8" NPT
✔ Ensure clean, debris-free lines when installing new vacuum and hydraulic connections
✔ Mounting style is not pre-defined; verify bracket compatibility before install
SOLD AS REMANUFACTURED | CORE RETURN REQUIRED
Built to OEM standards | thoroughly cleaned, inspected, and tested to ensure durability, performance, and reliability in demanding applications.
Warranty Information
