Product Description
A840 / A840X POWER CLUSTER – AIR/HYDRAULIC ACTUATOR
PART NUMBER(S):
Fleet Products: A840, A840X, 65-840R, 65-840, 65-840L, 840X, 840, 6510R, 6510, 6510L | OE: A838, A839, FE1099 | Wagner: AF840 | Automann:
DESCRIPTION:
Model: A840 / A840X – Power Cluster
Vehicles: Heavy-Duty Trucks, Trailers, and Vocational Vehicles
• Air Chamber Diameter: 7″
• Air Chamber Length: 5″
• Stroke: 2.5″ (63.5 mm)
• Bore Size: 1 ¾″ (44.45 mm)
• Output Pressure: 1,500 PSI
• Hydraulic Volume: 6 Cubic Inches (98.3 cc)
• Inlet Port: 5/16″ Inverted Flare
• Master Cylinder Casting #: FE1099 (4-bolt configuration)
• Mounting Orientation: Horizontal installation recommended for seal integrity and proper air purge
• Actuation Type: Air/Hydraulic – converts air pressure into hydraulic braking force
• Function: Designed for systems requiring air-over-hydraulic braking actuation, providing reliable performance under heavy-duty conditions
• Unique Features:
– Wagner-style configuration
– Internal residual check valve
– Thoroughly cleaned, inspected, and tested remanufactured unit (A840X)
– Built to OEM specifications
• System Fitment: Air/hydraulic brake systems for medium and heavy-duty commercial trucks, trailers, buses, and specialty vocational equipment
• Fluid Compatibility: Compatible with DOT 3, DOT 4, DOT 5, DOT 5.1 brake 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.
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.
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
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- Competitive pricing with core return refunds
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