Product Description
374000X – HYDROVAC (PISTON STYLE)
PART NUMBER(S):
Fleet Products: 374000X, 374000, 2208488, PB-374000-R, RV379474X
OE: 379474
DESCRIPTION:
Model: 374000 / 374000X
Vehicles: Trucks, Trailers, Busses, Tractors
• Type: Piston-style Hydrovac (Single Piston)
• 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
• Condition: New (no core required)
• Unique Features: OEM-tested for durability, compact form factor for tight-space installs
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, 374980X, RV374980X, RV374980X-MD, 373853, 374980, 375698, 377215, 51-8056, HDX RV374980X, MID RV374980X, 5396-RV374980X, MIDRV374980X, MBIRV374980X, ZZRV374980X, 767653094762
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.
SUPPORT & ORDERING
For technical support, installation guidance, or to confirm fitment, Call: 1-877-243-0442 | Email: sales@fleet-products.com
WHY CHOOSE FLEET PRODUCTS | KBR - HEAVY DUTY TRUCK & TRAILER PARTS?
- Canadian-owned and operated since 1985
- Trusted by fleets, mechanics, and B2B partners across North America
- Fast, reliable shipping across North America
- Competitive pricing with core return refunds
- Price Match Guarantee | Find a better price? We'll beat the difference by 10%!
