The Hilti TE 17 is a corded SDS-plus rotary hammer/drill known for durability and serviceability. Below is a deep breakdown of its major assemblies, common wear parts, diagnostics, and maintenance tips for repairers and DIYers.
The gray, fiberglass-reinforced polyamide housing is the skeleton. Key components in this section of the parts diagram include:
Diagram insight: Look for callout #3-7 in the schematic – this identifies the integrated switch lock button, a common failure point.
In the Hilti TE 17 parts diagram, the housing is usually the first layer you see (Items 1-10). It includes:
Pro Tip: If your TE 17 runs intermittently, check the trigger contacts first. The diagram reveals a simple design—clean or replace the copper contact plate.
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.
Never power up the tool with the barrel removed – the impact piston can become a projectile.
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.
When your TE 17 starts losing power, leaking oil, or refusing to hammer, you have two choices: throw it away (expensive) or repair it (smart). To repair it, you need the Hilti TE 17 parts diagram.
In this post, we break down the key assemblies, where to find the official diagram, and how to identify the parts that fail most often.
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