Flow Parts
High-Pressure Mechanical Shift Actuator Pin
High-Pressure Mechanical Shift Actuator Pin
Hardened, split-style pin that provides the mechanical backup trigger for stroke reversal on Flow intensifiers. If the electronic shift signal is missed, the pin physically trips the shift mechanism at end-of-stroke to prevent over-travel, pressure spikes, and seal damage. Replace any time the tip is mushroomed, bent, or worn.
Related Products:
- Electronic Shift Proximity Sensor Assembly (011275-1) — primary end-of-stroke sensor the pin backs up.
- Actuator Assembly, Electronic Shift (B-8346-1) — houses the firing pin the shift pin contacts.
- Compression Spring .396 ID × .48 OD (A-2409) — return spring that resets the actuator each stroke.
Service tip: set pin projection per the service manual and use medium-strength threadlocker on the jam nut. After install, jog the pump at low pressure and verify clean reversals on both ends.

Flow Knowledgebase
If you have an account setup at Flow Parts, you have access to the Flow Knowledgebase. This is a technical repository of Waterjet service, pump, maintenance, and safety information.
The OEM Difference
No one tests like Flow. Flow OEM parts deliver unmatched precision, durability, and safety. Every component is engineered to outperform and outlast the rest.