Bosch Pst 52a Manual Fixed -

This is where the fixed manual PST 52A shines. Mine is over 15 years old, original carbon brushes (though I should replace them soon). The gearbox is sealed and lubricated for life — no maintenance needed. The SDS blade holder still clicks and locks perfectly. I’ve cut hundreds of meters of material without any electrical failure.

Symptoms: The lever for "Pendulum action" (usually 0-3 or 0-4) won't move, or is stuck in one setting. Fix: Bosch Pst 52a Manual Fixed

Symptoms: Blade falls out during cutting or wobbles excessively. This is where the fixed manual PST 52A shines

Manual reference: Page 10 (Blade change) and Page 16 (Exploded view of blade holder). If the metal jaws inside are worn, you

DIY Fix:
The PST 52A uses a SDS-style tool-less blade clamp (early version). The most common failure is a worn rubber O-ring inside the clamp.

Step-by-step repair (fixed manual instructions):

If the metal jaws inside are worn, you need a replacement clamp assembly (Bosch part #2615387502). The fixed manual includes a correct parts list – many online copies mistakenly list the PST 55 part.