Description
A840 / A840X POWER CLUSTER – AIR/HYDRAULIC ACTUATOR
PART NUMBER(S):
Fleet Products: A840X (Remanufactured) | Replaces OE: Bendix A838, A839, FE1099 | Wagner AF840, AF840X
DESCRIPTION:
Model: A840 / A840X – Brake Actuator Power Cluster with Master Cylinder 7" long X 1-3/4" dia. (FE1099)
Vehicles: Heavy-Duty Trucks, Trailers, and Vocational Vehicles
• Type: Air-over-hydraulic brake booster
• Application: Medium- and heavy-duty air/hydraulic brake systems
• Dimensions: 7.00 in air chamber diameter
• Dimensions: 5.00 in air chamber length
• Stroke: 2.5 in (63.5 mm)
• Bore Diameter: 1.75 in (44.45 mm)
• Hydraulic Volume: 6 in³ (98.3 cc)
• Output Pressure: 1500 PSI
• Inlet Port: 5/16 in inverted flare
• Master Cylinder Casting: FE1099, 4-bolt configuration
• Mounting: Horizontal installation recommended
• Material: Remanufactured Wagner-style assembly
• Performance: Air-over-hydraulic actuation
• Features: Internal residual check valve, OEM-spec remanufactured unit, compatible with DOT 3/DOT 4/DOT 5/DOT 5.1 fluids and mineral-based hydraulic oils
Applications:
Engineered for integration into dual-circuit and spring-brake equipped air/hydraulic brake systems. Designed as a direct replacement for Wagner and Orscheln systems. Suited for severe-duty fleets requiring a hybrid pressure solution where full pneumatic brake power isn't available. A-88862 is Like A840 for International 530 with Rubber tire loader but Piston is different.
CROSS-REFERENCE(S):
A840X, A840, 65-840R, 65-840, 65-840L, 840X, 840, 6510R, 6510, 6510L, A838, A839, AF840, FE1099
A cross-reference listing means the part can be used as a direct or functional replacement for the listed part numbers.
IMPORTANT INSTALLATION NOTES:
✔ Designed for horizontal mounting – prevents seal damage and ensures proper operation
✔ Bleed system after installation to remove entrapped air
✔ Inlet port: 5/16″ inverted flare – confirm fitting compatibility
✔ Apply light oil to actuator pivots during maintenance intervals
✔ Integrated residual check valve for better hydraulic system integrity
✔ Confirm fitment using master cylinder casting number FE1099 if unsure
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
