Spindle surges on tool breakthrough.
|
Probable Cause |
Check |
Remedy |
| Air in hydraulic system. | Check for leaks. | Reseal leaking area or return to factory for repair. |
| Air input pressure too low. | Air pressure should be above 50 psi. | Regulate per Eng. Data. Bul. |
| Thrust required to advance tool at desired feed rate approaches or exceeds thrust developed by air cylinder. | Consult drilling speed, feed and thrust charts and compare with developed thrust of unit. | Decrease feed rate. Increase input air pressure. Stagger drill lengths. Decrease size or number of tools. Substitute with hydraulic powered holomatic unit. |
| Plunger assembly allows air to enter hydraulic system. | Remove and inspect seal and/or plunger. | Replace - Ref. Manifold Assy. Bul. |
