What causes oil leakage through air exhausts in my Graco Water Pump?
- KKristin FrySep 12, 2025
If there's oil leakage through the air exhausts of your Graco Water Pump, replace the throat seal (u-cup).

What causes oil leakage through air exhausts in my Graco Water Pump?
If there's oil leakage through the air exhausts of your Graco Water Pump, replace the throat seal (u-cup).
What causes erratic or accelerated pump speed in my Graco Water Pump?
If your Graco Water Pump is experiencing erratic or accelerated pump speed, start by refilling and repriming the pump. If the fluid is too heavy for priming, use an inductor or follow the plate. If issues persist, replace the valve gasket. You might also need to lower air pressure to prevent recurrence.
| Series | LD Series |
|---|---|
| Power Source | Pneumatic |
| Fluid Types | Oil, Grease |
| Air Inlet Size | 1/4 inch NPT |
| Fluid Outlet Size | 1/4 inch NPT |
| Wetted Parts | Steel, Nitrile Rubber |
| Dimensions | Varies by model |
Read all warnings and instructions in this manual. Save these instructions for future reference.
Precautions to prevent fire and explosion when flammable fluids are present in the work area.
Warnings about potential injury or death caused by incorrect operation or modification of equipment.
Information on the serious risk of high-pressure fluid injection injuries and necessary immediate treatment.
Risks associated with moving parts that can pinch or amputate fingers and other body parts.
Hazards related to high-pressure fluid splashing into eyes or on skin, causing serious injury.
Detailed steps for winding and attaching a hose to a bare hose reel, including spring tensioning.
Steps to safely relieve pressure from the system before performing maintenance or servicing.
Procedure for safely removing and replacing a service hose on the hose reel.
Technical data including fluid pressure, inlet/outlet, operating temperature, and wetted parts for low-pressure reels.
Technical data including fluid pressure, inlet/outlet, operating temperature, and wetted parts for medium-pressure reels.
Technical data including fluid pressure, inlet/outlet, operating temperature, and dry weight for high-pressure reels.
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