Description
65-840L BRAKE ACTUATOR POWER CLUSTER – AIR/HYDRAULIC ACTUATOR
PART NUMBER(S):
Fleet Products: 65-840L, 65-840, 65-840R, 6510L, 6510, 6510R | OE: A840, A838, A839 | Automann:
DESCRIPTION:
Model: 65-840L – Left-Side Mount
Vehicles: Heavy-Duty Truck and Trailer Applications
• Output Pressure: 1,500 PSI
• Stroke: 2.5″ (63.5 mm)
• Diaphragm: Type 30
• Bore Size: 1 ¾″ (44.45 mm)
• Hydraulic Volume: 6 Cubic Inches (98.3 cc)
• Inlet Port: 5 1/16″ Inverted Flare
• Mounting Bracket: Left Side
• Actuation Type: Air/Hydraulic – Converts compressed air to hydraulic pressure
• Function: Powers hydraulic braking force for vehicles using air-assisted brake systems
• Design: Wagner style power/pressure cluster
• Fluid Compatibility: DOT 3, 4, 5, 5.1 brake fluid or mineral-based hydraulic oil
• Unique Features:
– Internal residual check valve
– No core required – sold as new
– Rigorously tested and ready to install
• System Fitment: Suitable for air/hydraulic brake configurations in trucks and trailers requiring spring brake or apply/release logic
• Orientation: Mounts horizontally to maintain internal seal integrity and avoid air entrapment
• Maintenance: Lubricate pivot points regularly; bleed hydraulic system post-installation
Applications:
This actuator serves as a direct replacement for Wagner-style power clusters, especially AF840 or A840 units. Designed for left-side installations on heavy-duty equipment, trailers, or vocational trucks where robust, repeatable brake actuation is essential.
CROSS-REFERENCE(S):
65-840L, 65-840, 65-840R, 6510L, 6510, 6510R, A840, A838, A839, AF840A cross-reference listing means the part can be used as a functional replacement or is interchangeable across the cited systems.
IMPORTANT INSTALLATION NOTES:
✔ Mounts on left-side bracket (horizontal position recommended)
✔ Use only compatible hydraulic fluids (DOT or mineral-based)
✔ Residual check valve pre-installed internally
✔ Bleed hydraulic system post-installation to remove air
✔ Lubricate pivot arm for long-term durability
✔ No torque specs cited; align actuator to prevent internal wear
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Warranty Information
