The Graco Modu-Flo® Pump is a device designed for dispensing a specific volume of lubricant. It is available in both pneumatic and hydraulic versions, offering flexibility for various applications. The manual provides detailed instructions for installation, operation, maintenance, and troubleshooting of these pumps.
Function Description
The Modu-Flo® Pumps are designed to accurately dispense lubricant. The pump's operation involves a pressure relief procedure, bleeding air, and adjusting output. The pneumatic versions are designated as AL-5M, while the hydraulic versions include HLJ-5M, HLJ-5X, and HLJ-25M. The pumps are capable of single or double acting operation, depending on the specific model and configuration.
Important Technical Specifications
The technical specifications for Modu-Flo® pumps vary between pneumatic and hydraulic models:
Pressure:
- Air Pressure: 40 - 150 psi (0.276 MPa (2.76 bar) - 1 MPa (10.3 bar))
- Hydraulic Pressure: 200 - 2000 psi (1.38 MPa (13.8 bar) - 13.8 MPa (138 bar))
Lube to Air Pressure Ratio:
Lube to Hydraulic Pressure Ratio:
- HLJ-5M and HLJ-25M: 5.5:1
- HLJ-5X: 2.2:1
Materials:
- Lubricating Fluid: Oil or grease up to NLGI-2
- Wetted Parts: Steel, Copper, Nitrile, PTFE
The output displacement per cycle ranges from 0.010 to 0.983 cu.in. (0.164 to 16.11 cm³), and the maximum cycles per minute can be up to 100, depending on the model. The approximate weight of the pumps ranges from 1.7 to 5.5 lb (0.77 to 2.49 kg).
Usage Features
The Modu-Flo® Pumps are designed for use with Graco Modu-Flo manifold packages. The specific model number indicates the pump type and its characteristics:
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Pneumatic Models:
- 563304 (AL-5M): Single acting, 0.010 to 0.030 cu.in. (0.164 to 0.492 cm³) output, 60 cycles/min.
- 563306 (AL-25M): Single acting, 0.030 to 0.120 cu.in. (0.492 to 1.966 cm³) output, 60 cycles/min.
- 563308 (AL-50M): Single acting, 0.060 to 0.240 cu.in. (0.983 to 3.933 cm³) output, 60 cycles/min.
- 563347 (ALJ-50M): Pneumatic, double acting, 0.060 to 0.240 cu.in. (0.983 to 3.933 cm³) output, 60 cycles/min.
- 563348 (ALJ-25M): Pneumatic, double acting, 0.030 to 0.120 cu.in. (0.492 to 1.966 cm³) output, 60 cycles/min.
- 563351 (ALJ-5M): Pneumatic, double acting, 0.010 to 0.030 cu.in. (0.164 to 0.492 cm³) output, 60 cycles/min.
- 563353 (AL-5M): Fixed at 0.030 cu.in. (0.492 cm³) output, 30 cycles/min.
- 563354 (AL-25M): Fixed at 0.120 cu.in. (0.492 cm³) output, 30 cycles/min.
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Hydraulic Models:
- 563305 (HLJ-5M): Hydraulic, double acting, 0.010 to 0.030 cu.in. (0.164 to 0.492 cm³) output, 100 cycles/min.
- 563307 (HLJ-25M): Hydraulic, double acting, 0.030 to 0.120 cu.in. (0.492 to 1.966 cm³) output, 50 cycles/min.
- 563345 (HLJ-5X): Hydraulic, double acting, 0.030 to 0.098 cu.in. (0.492 to 1.51 cm³) output, 50 cycles/min.
The pumps can be configured for single or double acting operation. Double acting air motors require a 4-way air valve, while all hydraulic models are double acting. All models are designed to mount directly to either a pump-to-reservoir manifold or a pump-to-wall manifold.
Maintenance Features
Regular maintenance is crucial for the safe and efficient operation of Modu-Flo® Pumps. The manual outlines several key maintenance procedures:
Pressure Relief Procedure:
- Always follow the pressure relief procedure before performing any maintenance or servicing to prevent serious injury from pressurized fluid. This involves disabling the pump's pneumatic or hydraulic supply and slowly loosening output connection fittings.
Bleeding Air:
- After assembly, disassembly, or reassembly, it may be necessary to bleed air from the pump. This involves reinstalling the pump, cycling it a few times, and then loosening the bleed screw (29) to allow air to escape.
Output Adjustment Procedure:
- The pump's output can be adjusted by turning the adjustment screw cap (12) and gasket (8). For AL-5M models, the adjustment screw cap (12) and jam nut (9) are used.
Troubleshooting:
- The manual provides a troubleshooting table to address common issues such as inconsistent pump output and irregular lubricant flow.
- Inconsistent Pump Output: This can be caused by air and/or lubricant leaks between the pump and the manifold, or a loose jam nut. Solutions include checking and tightening screws, replacing gaskets, and ensuring the jam nut is securely tightened.
- Irregular Lubricant Flow: This is typically due to air trapped in the pump/system. The solution involves cycling the pump a few times and bleeding out the air by loosening the bleed screw.
Warnings and Safety Precautions:
- Skin Injection Hazard: High-pressure fluid from the dispensing device can pierce skin. Always follow the pressure relief procedure, wear protective clothing, and never place hands over the fluid outlet.
- Equipment Misuse Hazard: Do not operate the unit with a failed or under the influence of drugs or alcohol. Do not exceed the maximum working pressure or temperature rating. Use fluids and solvents that are compatible with equipment wetted parts. Always follow the pressure relief procedure before checking or repairing equipment.
- Personal Protective Equipment: Wear appropriate protective equipment, including eye injury, hearing loss, inhalation of toxic fumes, and burns. This includes protective eyewear, hearing protection, respirators, and protective clothing.
Repair Kits:
- The manual lists various repair kits available for different models, including:
- 563902: Repair Kit, AL-5M (includes parts 2-5, 8, 9, 14, 21-26, 33-35)
- 563903: Repair Kit, AL-25M (includes parts 2-5, 8, 9, 14, 21-26, 33-35)
- 563904: Repair Kit, AL-50M (includes parts 2-5, 8, 9, 14, 21-26, 33-35)
- 563905: Parts included in Kit 563905 (HLJ-5M and HLJ-5X)
- 563906: Parts included in Kit 563906 (HLJ-25M)
The Graco Modu-Flo® Pumps are robust devices designed for precise lubricant dispensing, with clear instructions for safe operation and maintenance to ensure longevity and performance.
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