Product Description
The Delco 18003998 Hy-Power Hydraulic Brake Booster is a hydraulic power-assist unit designed primarily for International/Navistar commercial vehicles equipped with heavy-duty hydraulic brake systems.
The Hy-Power system uses hydraulic pressure to multiply driver pedal force, providing the additional braking assist required by medium- and heavy-duty trucks. The 18003998 configuration features a 5-1/2-inch threaded and staked push rod, a single-prong flow switch, and casting number 2623435. This unit is closely related to the Delco 18001810, but the two should not be selected by casting number alone. The 18003998 was primarily used on IHC/Navistar vehicles and differs in its push-rod and hydraulic-line configuration. Always verify the original part number, rod length, inlet fitting, flow switch, and mounting arrangement before ordering.
Part Number: 18003998
Reman Reference: 18003998X / RV18003998X
Brand: Delco
Product Type: Hy-Power Hydraulic Brake Booster
Primary Application: International / Navistar
Push Rod: 5-1/2 in., threaded and staked
Flow Switch: Single Prong
Casting Number: 2623435
Common OE References: 484238C91, 504837C91, 504838C91
Haldex Core Group: VAC1018
Approx. Unit Weight: 17 lb
