Description
2500660X - SINGLE PISTON HYDROVAC
PART NUMBER(S):
Fleet Products: 2500660X (Remanufactured) | Replaces OE: GMC 2785516, 3786458, 2500660, 2500085, 2500420 | IHC 967547R91, 967547R92 | Cardone 51-8002 | Navistar (IHC) 967547R91, 967547R92
DESCRIPTION:
Model: Single Piston Hydrovac Brake Booster, Third Series, Single Diaphragm
Vehicles: Chevrolet medium-duty trucks (1974, 1962 C60, 1973 C60, 1987 1-ton), Dodge medium trucks and RVs, International Harvester farm trucks (1963)
• Diameter: 11.236"
• Overall Length: 12-1/2"
• Input Port: 1/2" - 20 Thread
• Output Port: 1/4" Inverted Flare
• Air Cleaner Port: 1/2"
• Vacuum Supply Port: 1/2" NPT (1/2" Inverted Flare)
• End Cap: CE
• Diaphragm Type: Single
• Number of Lines: Three line
• Output Port Connects: To master cylinder reservoir
• Housing Material: Steel
• Minimum 1000 psi hydraulic pressure at wheel brakes with 150 lbs pedal force @ 16” Hg vacuum
Applications:
Designed for heavy-duty truck and equipment hydraulic brake systems requiring vacuum-assisted boost. Common on Dodge medium trucks, RVs, and Chevrolet medium-duty trucks for reliable braking assistance.
CROSS-REFERENCE(S):
2500660X, 2500660, 51-8002, 373853, 375698, 377215
A cross-reference listing means this part may be a compatible replacement for these part numbers based on OEM or distributor data.
IMPORTANT INSTALLATION NOTES:
✔ Mount using bracket with studs (reuse hardware), universal holes (3/8”-16 bolts), or threaded lugs
✔ Ports have 1/2”-20 threads; adaptors for 7/16”-24 line fittings supplied if required
✔ Vacuum port nipple adapts from 1/2” to 3/8” if needed
✔ Bleed system with engine off following sequence: control valve, end cap, then wheel brakes
✔ Minimum vacuum requirement: 16” Hg for proper operation
✔ Hydraulic pressure minimum: 1000 psi at wheel brakes with 150 lbs pedal force and 16” Hg vacuum
✔ System leakage test: max 2” Hg drop in 60 sec (with reservoir), 15 sec (without reservoir)
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
