If you own a job site, you probably own (or have borrowed) a Hilti TE 17. This tool is legendary for its brute force in light chiseling and overhead drilling. But even legends wear out.
Before disassembling your rotary hammer, understand that the TE 17 uses a complex electro-pneumatic mechanism. Guessing screw lengths or spring positions can destroy the tool. An official Hilti TE 17 parts diagram provides: hilti te 17 parts diagram
The Hilti TE 17 parts diagram shows a very tight tolerance between the drive piston and impact piston – that air gap is a safety feature. If you incorrectly reassemble the tool without the O-ring or with the wrong piston orientation, the tool can lock up at full speed, shattering the barrel. Hilti TE 17 Parts Diagram: A Visual Guide
Maintain the airtight seal required for the pneumatic hammering effect. Connecting Rod Why You Need an Official Parts Diagram Before
Connects the crank to the piston; essential for the hammering stroke. Rotary Shaft Seals