Product Description
The 374750 Hydrovac is a single-piston vacuum/hydraulic brake booster designed for older medium- and heavy-duty commercial vehicle braking systems. It uses engine vacuum to assist hydraulic brake pressure, reducing pedal effort while increasing available braking force.
Haldex specifies the RV374750X remanufactured equivalent with a 9-1/2-inch vacuum cylinder diameter, approximately 22-inch overall length, 1/2"-20 threaded hydraulic input and output connections, 3/4-inch air-cleaner connection, and 1/2-inch NPT vacuum supply connection. The assembly uses End Cap B and weighs approximately 26 lb.
The 374750 is associated primarily with IHC/International and GMC commercial vehicles. Fleet Products lists use across trucks, trailers, buses, and tractors from roughly 1957–1986, but because these vehicles used numerous Hydrovac configurations, customers should verify the original part number, overall length, port sizes, and mounting arrangement before ordering.
Part Number: 374750
Haldex Reman: RV374750X
Product Type: Vacuum/Hydraulic Hydrovac Brake Booster
Design: Single Piston
Diameter: 9-1/2 in.
Overall Length: 22 in.
Hydraulic Input: 1/2"-20
Hydraulic Output: 1/2"-20
Air Cleaner: 3/4 in.
Vacuum Supply: 1/2" NPT
End Cap: B
Product Weight: 26 lb
Core Group: VAC1015