Hydra part 441-029 is a reset spring designed to return the reset mechanism to its neutral position on compatible Hydra M and Hydra Pro Super sprayers. This spring ensures positive engagement and disengagement of the thermal overload reset function. Replacing a broken, stretched, or missing reset spring restores proper reset operation and helps maintain reliable overload protection.
| Part Number | 441-029 |
|---|---|
| Part Description | Reset Spring |
| Brand | Hydra |
| Fits | Hydra M, Hydra Pro Super |
| Condition | New |
The Hydra 441-029 Reset Spring is a small but essential component of the thermal overload reset mechanism on compatible Hydra sprayers. After the reset pin is pushed to re-engage the overload switch, this spring returns the pin to its resting position, ensuring the mechanism is ready for the next trip event.
Over time, the reset spring can become stretched, weakened, or broken due to repeated cycling or corrosion. A failed spring may prevent the reset pin from returning fully, causing it to stick or not actuate the switch properly. This can lead to an inability to reset the overload or intermittent electrical contact. Replacing the reset spring restores the positive action of the reset mechanism and ensures reliable overload protection.
| Return action | Returns the reset pin to its neutral position after actuation |
|---|---|
| Mechanical bias | Provides consistent force to keep the reset mechanism disengaged until needed |
| Reliability | Ensures the reset pin does not stick or interfere with switch operation |
| Broken spring | Spring is physically fractured or separated |
|---|---|
| Stretched / weakened | Spring no longer provides enough force to return the pin |
| Missing spring | Spring absent, reset pin has no return action |
| Corroded / rusted | Spring material degraded, affecting performance |
Hydra part 441-029 is compatible with the following sprayer models. Always confirm fitment using the correct parts diagram for your exact model and serial number.
| Model | Component |
|---|---|
| Hydra M | Reset Spring |
| Hydra Pro Super | Reset Spring |
Reset spring issues may involve associated components. When servicing the reset spring, these parts are commonly inspected or replaced at the same time.
The pin that actuates the overload switch; inspect for damage or wear.
If the reset mechanism is problematic, the switch itself may need testing or replacement.
Check for debris or damage that could interfere with spring action.
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