To Next PageTo Next PageHow to fix Graco Water Pump that cycles at stall or fails to hold pressure?
If your Graco Water Pump cycles at a stall or fails to hold pressure at a stall, it could be due to worn check valve balls, seats, or o-rings, which will need to be replaced.
How to fix a Graco Husky 1590 that cycles at stall or fails to hold pressure?
If your Graco Water Pump cycles at stall or fails to hold pressure, it may be due to worn check valve balls, seats, or o-rings. Replacing these components may resolve the issue.
Why are there air bubbles in the fluid of my Graco Husky 1590?
If you notice air bubbles in the fluid of your Graco Water Pump, several issues could be the cause. First, check if the suction line is loose and tighten it. Another potential cause is a ruptured diaphragm, which requires replacement. Also, inspect the inlet manifold for looseness, damaged seals, or o-rings, and tighten the manifold bolts or replace the seats or o-rings as necessary. Furthermore, check the diaphragm shaft bolt and o-ring for looseness or damage, and tighten or replace them as needed.
What to do if Graco Husky 1590 Water Pump operates erratically?
If your Graco Water Pump is operating erratically, several factors could be responsible. Begin by inspecting the suction line for any clogs and clear them. Also, check the balls for stickiness or leaks; clean or replace them if necessary. A ruptured diaphragm may also cause erratic operation, requiring replacement. Finally, check for any restrictions in the exhaust and remove them to ensure proper pump function.
What to do if Graco Husky 1590 Water Pump will not cycle, or cycles once and stops?
If the Graco Water Pump will not cycle or cycles once and stops, there are a few potential causes. The air valve may be stuck or dirty, requiring disassembly and cleaning. Ensure you use filtered air during reassembly. A severely worn check valve ball wedged in the seat or manifold can also prevent cycling, necessitating replacement of both the ball and seat. Another possibility is that the check valve ball is wedged into the seat due to over-pressurization, in this case install a Pressure Relief Valve. Lastly, a clogged dispensing valve can halt the pump's operation; relieve the pressure and clear the valve.
Why is there fluid in the exhaust air of my Graco Water Pump?
If fluid is present in the exhaust air of your Graco Water Pump, it may be due to a ruptured diaphragm, which needs to be replaced. Another potential cause is a loose diaphragm shaft bolt, which should be tightened or replaced. Additionally, a damaged o-ring can lead to fluid in the exhaust air, requiring replacement.
Why does my Graco Husky 1590 Water Pump exhausts excessive air at stall?
If your Graco Water Pump exhausts excessive air at stall, it could be due to worn components in the air valve assembly, such as the air valve block, o-ring, plate, pilot block, u-cups, or pilot pin o-rings. These parts may need repair or replacement. Additionally, worn shaft seals can cause excessive air exhaust, requiring their replacement.
Why is my Graco Husky 1590 Water Pump leaking air externally?
If your Graco Water Pump leaks air externally, it could be due to loose air valve cover or air valve cover screws, which need to be tightened. Alternatively, the air valve gasket or air cover gasket may be damaged and require inspection and replacement. Also, check if the air cover screws are loose and tighten them.
What causes fluid leaks externally from ball check valves in Graco Husky 1590 Water Pump?
If your Graco Water Pump leaks fluid externally from the ball check valves, it may be due to loose manifolds, a damaged seal between the manifold and seat, or damaged o-rings. To resolve this, tighten the manifold bolts or replace the seats or o-rings as needed.
Why are there air bubbles in the fluid from my Graco Husky 1590 Water Pump?
Air bubbles in the fluid may be caused by several issues: * A loose suction line: Ensure it is tightened. * A ruptured diaphragm: Replace it. * A loose inlet manifold, damaged seal between the manifold and seat, or damaged o-rings: Tighten the manifold bolts or replace the seats or o-rings. * A loose diaphragm shaft bolt: Tighten or replace it. * A damaged o-ring: Replace it.
General| Size | 1.5 inch |
|---|---|
| Hose Size | 1.5 inch |
| Type | Diaphragm Pump |
| Max Flow Rate | 90 GPM |
| Max Fluid Pressure | 125 PSI |
| Max Air Pressure | 125 PSI |
| Air Inlet Size | 1/2 inch |
| Fluid Inlet Size | 1.5 inch |
| Fluid Outlet Size | 1.5 inch |
| Solids Handling | 1/8 inch |
| Power Source | Pneumatic |
Read all warnings and instructions in this manual and save them for future reference.
Warning regarding potential serious injury from equipment misuse, emphasizing professional use and adherence to instructions.
Warning about serious injury or death from hazardous fluids or toxic fumes, requiring protective measures.
Warning about fire and explosion risks due to improper grounding, ventilation, or ignition sources.
Critical procedure for grounding the pump and system to prevent static discharge and fire hazards.
Recommendation to install a pressure relief valve to prevent overpressurization and pump damage.
Essential safety procedure to relieve system pressure before any maintenance or checks.
Comprehensive steps for starting, priming, and adjusting the pump's air regulator for optimal performance.
Detailed guide for disassembling, inspecting, and repairing the pump's air valve assembly.
Step-by-step instructions for disassembling and reassembling the ball check valves.
Procedures for removing, replacing, and inspecting the pump diaphragms.
Instructions for correctly reassembling standard diaphragms and related components.
Instructions for correctly reassembling overmolded diaphragms and related components.
