24V DC Industrial Lubrication Pump for 5-Gallon Systems
The Lincoln 85569 FlowMaster is a 24V DC rotary-driven electric pump engineered for automated lubrication systems using 5-gallon (18-liter) containers. This positive displacement double-acting pump delivers precise lubricant flow control for industrial machinery, heavy equipment, mining vehicles, and centralized Centro-Matic® lubrication applications.
Unlike single-acting pumps, the 85569 outputs grease during both the up and down stroke, providing consistent flow with minimal pulsation. An integrated speed control allows output adjustment from 10% to 100% of maximum speed.
Technical Specifications
| Parameter | Value |
|---|---|
| Model Number | 85569 |
| Power Supply | 24V DC (18V min, 32V max) |
| Motor Power | 1/3 HP (0.25 kW) |
| Current Draw | 1.28–3.2 A (typical, depending on backpressure); Fuse: 5A recommended |
| Gear Ratio | 17.8:1 (two-stage planetary) |
| Operating Speed | 9.5 to 100 RPM (variable, 10%–100% via integrated speed control) |
| Output per Cycle | 0.07 cu.in. (1.51 cm³) per pump cycle |
| Output Volume | 0.7–6.3 in³/min (11.5–103 cm³/min) at rated conditions |
| Maximum Pressure | 2,500 PSI (172 bar) — do not exceed rated pressure |
| Pump Outlets | Dual 1/4″ NPTF female ports (opposite sides) |
| Mounting Pattern | Universal 4-bolt configuration for drum cover |
| Container Compatibility | 5-gallon (18-liter / 35 lb) pail |
| Lubricant Types | Grease up to NLGI Grade 2; industrial oils |
| Operating Temperature | -40°F to +150°F (-40°C to +66°C) |
| Weight | 30 lbs (13.3 kg) |
Pump Performance by Temperature & Speed
Test conducted with Avania NLGI #2 grease at 1,000 PSI (69 bar) backpressure:
| Temperature | 50 RPM | 100 RPM | 200 RPM | 250 RPM | 300 RPM | 350 RPM |
|---|---|---|---|---|---|---|
| 80°F (27°C) | 3.5 (57) | 7 (115) | 10.5 (172) | 17.5 (287) | 21 (344) | 24.5 (401) |
| 40°F (4°C) | 3.5 (57) | 7 (115) | 10.5 (172) | 14 (229) | 17.5 (287) | 21 (344) |
| 20°F (-7°C) | 3 (49) | 6 (98) | 9 (147) | 12 (197) | 15 (246) | 18 (295) |
| 0°F (-18°C) | 3 (49) | 6 (98) | 9 (147) | 12 (197) | 15 (246) | 18 (295) |
| -10°F (-23°C) | 2.5 (41) | 5 (82) | 7.5 (123) | 10 (164) | 12.5 (205) | 15 (246) |
Values in cu.in./min (cm³/min). Output decreases at lower temperatures due to increased grease viscosity.
Key Features
Precise Flow Control
Variable speed operation from 9.5 to 100 RPM provides output volumes ranging from 0.7 to 6.3 in³/minute. The integrated speed control potentiometer allows precise matching to specific lubrication requirements without waste or under-lubrication.
Dual Port Design
Two 1/4″ NPTF outlets on opposite sides offer maximum installation flexibility. One outlet can be used for system supply while the other accommodates a safety unloader/relief valve.
Robust Construction
- Common Crankcase Design: Unified construction across FlowMaster series for consistency and parts interchangeability
- Dual Bearing Load Support: Enhanced durability through distributed mechanical stress on the drive shaft
- O-Ring Sealed Interfaces: Prevents leakage and contamination in all motor-to-crankcase connections
- Planetary Gear Set: Two-stage 17.8:1 reduction for balanced speed and torque
Integrated Motor Protection
- Under/over-voltage protection (shuts off outside 18–32V range)
- Voltage spike protection
- Thermal and overload protection
- Locked rotor protection
⚠️ Critical Safety Warnings
- Do not exceed 2,500 PSI maximum rated outlet pressure. Exceeding rated pressure may result in damage to system components and personal injury
- Pumps are NOT equipped with a high-pressure shut-off valve. Always install a relief valve in the pump outlet to ensure pressure remains below 5,000 PSI (345 bar) or 2,500 PSI (172 bar) for Model 85569
- Install a high-pressure shut-off valve in the material supply line — this is required
- The motor is polarity sensitive. Connect the red motor lead to the positive side of the circuit; improper wiring will prevent operation
- Mount the pump securely on the drum cover. Failure to do so could result in personal injury and equipment damage from vibration or loosening
- Use high-pressure components to reduce risk of serious injury including fluid injection and splashing
Installation Requirements
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- Mount securely: Attach the pump firmly to the 5-gallon drum cover so it cannot move or vibrate during operation
- Flush before use: The pump is tested in lightweight oil and shipped with residual oil inside. Flush thoroughly before connecting to the grease system to prevent contamination
- Connect supply line: Attach high-pressure tubing to one 1/4″ NPTF outlet
- Install safety unloader: Mount a relief valve (e.g., 272722 rated 4,000 PSI or 272572 rated 2,500 PSI) to the opposite outlet
- Install shut-off valve: Place a high-pressure shut-off valve in the material supply line (required)
- Wiring: Connect red motor lead to positive (+) and black to negative (-). Fuse the motor with a 5A fuse
- Speed adjustment: Set the speed control potentiometer to the desired RPM (9.5–100 RPM)
Applications
- Industrial Equipment: CNC machining centers, production lines, conveyor systems, material handling machinery
- Heavy Duty Operations: Construction equipment, mining machinery, fleet vehicle maintenance, remote lubrication points
- Centralized Systems: Lincoln Centro-Matic® single-line parallel, single-line progressive, and dual-line systems
- Manual Lubrication: Can be used with hose reel and dispensing valve for manual grease delivery
Maintenance & Support
- External Accessibility: All critical components are externally accessible for service
- Filter Inspection: Check and clean the strainer (Part 272180) periodically
- Seal Replacement: Replace O-rings and seals at signs of leakage or during annual overhaul
- Pressure Verification: Compare system pressure against factory pump curves to detect wear or blockage
- Follower Plate: Use Lincoln follower plate (Part 252725) for 5-gallon pails to reduce waste and prevent grease contamination
Available Accessories
| Part Number | Description |
|---|---|
| 271705 | Drum cover for 35 lb (5 gal) pail |
| 252725 | Follower plate for 35 lb pail |
| 272180 | Strainer / filter |
| 85564 | Vent valve assembly (24V DC) |
| 272572 | Safety unloader/relief valve, 2,500 PSI |
| 272722 | Safety unloader/relief valve, 4,000 PSI |
| 272569 | Lock washers (mounting hardware) |
Ordering Information
- Part Number: 85569
- Manufacturer: Lincoln Industrial (SKF Group)
- Power: 24V DC, 1/3 HP (0.25 kW), 5A fuse recommended
- Output Ports: Dual 1/4″ NPTF
- Flow Range: 0.7–6.3 in³/minute (temperature and speed dependent)
- Pressure Rating: 2,500 PSI maximum
- Weight: 30 lbs (13.3 kg)
Frequently Asked Questions
What is the Lincoln 85569 FlowMaster?
The 85569 is a 24V DC electrically operated rotary pump for 5-gallon (35 lb) grease pails. It features a 17.8:1 two-stage planetary gear set, variable speed control (9.5–100 RPM), and dual 1/4″ NPTF outlets. It is a positive displacement double-acting pump, meaning it delivers grease during both the up and down strokes.
What is the maximum pressure of the 85569?
The 85569 has a maximum rated outlet pressure of 2,500 PSI (172 bar). Do not exceed this pressure. The pump does not have a built-in high-pressure shut-off valve — you must install an external relief valve (e.g., 272572 at 2,500 PSI or 272722 at 4,000 PSI) in the supply line.
What is the output range?
At 100 RPM with NLGI #2 grease at 1,000 PSI backpressure and 80°F, output is approximately 7 in³/min (115 cm³/min). At 50 RPM under the same conditions, output is approximately 3.5 in³/min (57 cm³/min). The minimum output at 9.5 RPM is approximately 0.7 in³/min. Output decreases significantly at lower temperatures due to grease viscosity increase.
What voltage does the 85569 require?
The 85569 operates on 24V DC with an acceptable range of 18V to 32V. The motor is polarity sensitive — the red lead must connect to positive (+) and the black lead to negative (-). The motor controller will shut off if voltage falls outside this range. A 5A fuse is recommended.
What is the 17.8:1 gear ratio for?
The 17.8:1 two-stage planetary gear ratio provides a balance between speed and torque for medium-duty 5-gallon pail applications. It allows the pump to start reliably in cold grease while maintaining sufficient output at higher RPM. Other FlowMaster models use 19:1 or 34:1 ratios for different container sizes and duty levels.
Related lubrication resources
Industrial lubrication systems · Grease pump systems · Automatic lubrication
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