Buyers Products 15 Gallon Central Hydraulic System is an all-in-one way to power and operate a hoist, plow, spreader, and pre-wet system. The system is quick and easy to install and even easier to use. Features like in-cab electric controls are ideal for installers and operators alike. By eliminating the need to plumb multiple hydraulic lines into the cab, the controls cut down install time, save cab space, and keep the heat and noise outside the cab. An optional GPS-based ground speed control system gives spreader operators superior control over material usage. With the GPS installed, the spreader will automatically adjust its flow rate based on vehicle speed. This ensures a proper level of salt coverage regardless of how fast or slow the truck is moving. The Central Hydraulic System includes everything you need to set up a 4-function hoist, spreader, and auger system. Simply install the reservoir assembly and plumb the flow and functions. All directional valves and spreader controls are mounted directly on the tank to streamline plumbing and make service simple. The 15 gallon reservoir assembly with valve enclosure is built from 304 stainless steel to stand up to road grime, salt, and inclement weather. It includes an in-tank return filter assembly, filler-strainer breather cap assembly, and a shielded sight temperature gauge. The valve enclosure features a latching stainless steel lid to provide the spreader, hoist, and plow valves additional protection. The system is ideal for light to medium duty applications. All Systems Include: Proportional spreader operation with compact 2-function or 3-function (auger-conveyor, spinner and pre-wet included with GPS versions) controls. 11 GPM, 3-way plow lift/4-way plow angle with two port reliefs and 4-way DA dump hoist with down port relief and power beyond. LED display, indexed dials, plow switch with detents to provide float in the down position, proportional spreader and auger speed control, 30 GPM adjustable flow divider valve. Optional Additions:GPS with capability for pre-wet and liquid spray functions in one convenient controller, including programmable blast (1-30 seconds) and low pressure pre-wet indicator. Please contact Customer Service for further options. Applications that require critical load holding, installer must use P.O. (Pilot Operated) checks or counterbalance valves as well.
Specifications
| Auger/Chain Port | 1/2 SAE ORB (-8) |
|---|---|
| GPS Capable? | No |
| GPS Included? | No |
| Hoist Action | Power Up/Power Down - 1 Port Relief |
| Hoist Control Included | Yes |
| Hoist Control Type | Electric |
| Inlet Port | 3/4 SAE ORB (-12) |
| Magnetic Drain Plug | Yes |
| Main Relief Setting | 3000 |
| Maximum Flow Rate | 28 |
| Maximum Pressure | 3000 |
| Number of Functions Supported | 4 |
| Oil Level/Temperature Gauge Included | Yes |
| Outlet Port | 2 NPT |
| Plow Action | Power Up/Power Down |
| Plow Control Included | Yes |
| Plow Control Type | Electric |
| Port Relief Angle | 1800 |
| Port Relief Hoist | 500 |
| Reservoir Material | 304 Stainless Steel |
| Reservoir Mount Position | Side Mount |
| Reservoir Type | Standard |
| Reservoir Volume (Gal.) | 15 |
| Return Line Filter Flow Rating | 26 |
| Return Line Filter Included? | Yes |
| Return Line Filter Rating | 10 |
| Spinner Port | 1/2 SAE ORB (-8) |
| Spreader Control Included | Yes |
| Spreader Control Type | Electric Over Hydraulic |
| Spreader Controller | HVC05 |
| Suction Filter Rating | 150 |
| Suction Filter Flow Rating | 49 |
| Suction Filter Included? | Yes |
| Suction Port | 2 NPT |
| Work Ports | 1/2 SAE ORB (-8) |
Advanced Technical Overview: Buyers Products 15 Gallon Central Hydraulic System (4-Function, Electric On/Off, Standard Reservoir, No GPS)
The Buyers Products 15 Gallon Central Hydraulic System offers a highly integrated and robust hydraulic solution for vocational vehicles, particularly those involved in demanding municipal, snow and ice control, or heavy-duty landscaping applications. Engineered for light to medium-duty operations, this system efficiently consolidates hydraulic power and control for up to four distinct functions: hoist operation, precise plow articulation (lift and angle), proportional spreader material delivery (auger/conveyor), and spinner control. This specific configuration features a standardized reservoir design and an advanced electric-over-hydraulic control interface, providing a foundational system without integrated GPS functionality for applications where ground speed control is not a core requirement.
System Architecture and Centralized Hydraulic Power
Central to this product is its centralized hydraulic power unit (HPU) philosophy. Unlike distributed systems that utilize independent hydraulic circuits for each implement, this central approach integrates a single 15-gallon reservoir and a common hydraulic pump (typically engine-driven, implicit to a functional hydraulic system). This centralized architecture confers several engineering and operational advantages:
- Reduced System Complexity: Consolidating components, hoses, and connections into a single HPU simplifies installation, minimizes potential leak paths, and streamlines system troubleshooting.
- Optimized Performance: A shared fluid reservoir and high-capacity pump enable efficient allocation of hydraulic power across multiple demanding functions, supporting sequential or prioritized operation.
- Enhanced Durability & Serviceability: Centralized filtration and thermal management components ensure consistent fluid cleanliness and temperature stability throughout the entire system. Routine maintenance procedures, such as fluid level checks and filter element replacements, are consolidated and easily accessible.
- Space & Weight Efficiency: The integration of the reservoir and valve manifold into a compact unit optimizes vehicle chassis space and contributes to overall weight management.
The 15 Gallon 304 Stainless Steel Reservoir Assembly
The core of the HPU is its 15-gallon hydraulic fluid reservoir. This volume is precisely engineered to provide sufficient fluid retention for diverse operational cycles, facilitate effective heat dissipation, and allow for proper de-aeration of the hydraulic fluid. The material selection of 304 stainless steel for the reservoir is a deliberate choice, offering critical advantages:
- Superior Corrosion Resistance: In environments exposed to road salts, de-icing chemicals, moisture, and other corrosive agents, 304 stainless steel provides exceptional resistance, significantly prolonging the reservoir’s lifespan compared to conventional materials.
- Structural Integrity: Stainless steel inherently offers high strength and rigidity, capable of enduring the dynamic stresses and vibrations typical of mobile equipment.
- Fluid Cleanliness: Its smooth, non-porous surface minimizes the adherence of contaminants and prevents internal corrosion, crucial for maintaining optimal hydraulic fluid cleanliness.
- In-Tank Return Filter Assembly: Strategically placed on the return line, this filter (10-micron nominal rating, 26 GPM flow) efficiently removes wear particles and environmental contaminants before fluid re-enters the reservoir, extending the life of pumps, valves, and actuators.
- Suction Filter: Rated at 150 microns with a 49 GPM capacity, this primary filter safeguards the hydraulic pump from larger particulate matter, preventing immediate damage and ensuring clean fluid intake, thus mitigating cavitation and abrasive wear.
- Filler-Strainer Breather Cap Assembly: This multifaceted component facilitates clean fluid replenishment, provides pressure equalization as fluid levels and temperatures fluctuate, and prevents airborne contaminants from entering the reservoir.
- Shielded Sight Temperature Gauge: Essential for monitoring hydraulic fluid temperature, this gauge allows operators to detect overheating early, which can degrade fluid properties and accelerate component wear.
- Magnetic Drain Plug: Located at the reservoir's lowest point, this plug simplifies fluid drainage during maintenance and diagnostically captures ferrous wear particles, indicating potential internal component degradation.
Integrated Valve Enclosure and 4-Function Control Manifold
A hallmark of this central hydraulic system is its integral valve enclosure, mounted directly on the reservoir. This design optimizes system packaging, simplifies plumbing, and provides robust component protection. Constructed from durable stainless steel and featuring a latching lid, the enclosure shields critical control valves from environmental exposure, physical impact, and unauthorized access.
Within this enclosure, the sophisticated 4-function control manifold precisely orchestrates each implement:
- Plow Control (3-way lift / 4-way angle): This circuit provides comprehensive plow articulation. A 3-way valve manages power-up and float for lift, while a 4-way valve controls left/right angle adjustments. Two port relief valves, factory-set at 1800 PSI, protect plow cylinders from over-pressurization during impacts, preserving component integrity. The in-cab plow switch includes detents for positive engagement of positions, including a crucial float mode for terrain following.
- Hoist Control (4-way DA dump hoist with Power Beyond): A 4-way double-acting (DA) valve delivers controlled power-up and power-down for dump body operations. A dedicated port relief valve, set at 500 PSI, offers protection against hydraulic shocks. The "Power Beyond" capability allows for downstream connection of additional hydraulic functions, utilizing residual system flow and pressure, enhancing system modularity.
- Spreader Control (Proportional Auger/Conveyor and Spinner): Precision spreading is achieved through proportional control of both auger/conveyor and spinner functions. This allows for continuous modulation of material delivery and spread pattern. An integrated 30 GPM adjustable flow divider valve ensures optimal and independent distribution of hydraulic flow, enhancing the accuracy of de-icing or spreading operations. The auger/chain and spinner ports are standardized at 1/2 SAE ORB (-8).
Electric Control System: In-Cab Ergonomics and Precision
The exclusively electric control interface offers significant operational and installation advantages. The system includes a dedicated HVC05 spreader controller, alongside integrated hoist and plow controls, all designed for in-cab mounting.
- Simplified Installation: Routing only electrical wires, rather than multiple high-pressure hydraulic hoses, substantially reduces installation time and eliminates potential leak points within the cab.
- Enhanced Operator Environment: The absence of hydraulic lines in the cab results in a quieter, cooler, and safer workspace, free from hydraulic heat, noise, and vibration.
- Intuitive & Precise Control: In-cab controls feature an LED display for clear feedback and indexed dials for precise, proportional adjustments (e.g., auger and spinner speeds). The plow switch's detents provide tactile feedback for specific positions, including float mode, ensuring ease of use even with gloved hands.
- Proportional Spreading: Continuous modulation of material flow and spread width, rather than discrete steps, leads to more uniform application and reduced material waste.
Performance Metrics and Port Specifications
The system guarantees reliable performance within its duty cycle. A main relief setting of 3000 PSI serves as the primary system safety valve. The maximum flow rate of 28 GPM signifies its capacity for demanding functions, typically in a non-simultaneous or prioritized sequence. The return line filter's 26 GPM flow rating aligns with system demands.
Standardized port specifications ensure reliable connections:
- Inlet Port: 3/4 SAE ORB (-12) for pump pressure output.
- Outlet Port: 2 NPT for main return to reservoir.
- Suction Port: 2 NPT for pump inlet, designed for minimal restriction.
- Work Ports (Plow/Hoist): 1/2 SAE ORB (-8) for actuators.
- Auger/Chain Port: 1/2 SAE ORB (-8) for material conveyance.
- Spinner Port: 1/2 SAE ORB (-8) for material distribution.
System Configuration: Absence of Integrated GPS
This model explicitly operates without an integrated GPS module. While the system architecture is inherently "GPS Capable" (as described for other variants or optional upgrades), this specific SKU does not include the GPS module or associated firmware for automatic ground speed-based material spreading. This configuration delivers a streamlined, cost-effective solution for operators preferring manual control over spreader output, or for applications where GPS-driven proportionality is not a functional requirement. It provides robust, precise manual control over all four hydraulic functions.
Critical Load Holding and Safety
For applications demanding critical load holding, such as certain aerial work platforms or crane operations, the system design advises the integration of additional safety components. While suitable for light to medium-duty hoist and plow functions, this standard configuration does not include pilot-operated (P.O.) checks or counterbalance valves as standard for all circuits. Installers are responsible for incorporating these components where absolute load holding stability is critical. P.O. checks prevent reverse flow and load drift, and counterbalance valves ensure controlled descent, significantly enhancing safety in high-risk scenarios. The included port relief valves for plow and hoist circuits provide essential overpressure protection.
Conclusion
The Buyers Products 15 Gallon Central Hydraulic System, featuring 4-function electric on/off controls and a standard stainless steel reservoir, represents a meticulously engineered and high-performance hydraulic solution for demanding vocational operations. Its centralized design, durable 304 stainless steel construction, comprehensive filtration, and intuitive electric-over-hydraulic controls collectively provide a reliable, efficient, and user-friendly system. Offering sophisticated manual control capabilities without integrated GPS, this model remains a prime choice for municipalities, contractors, and other professionals seeking a durable and effective hydraulic power system tailored for their light to medium-duty fleet requirements.
