17. (6 points) A factory produces a batch of parts. If it produces 3 fewer parts per day than originally planned, and the production quota is reduced by 60 parts, it will take 31 days to complete; if it produces 3 more parts per day, and the production quota is increased by 60 parts, it will take 25 days to complete. Then the original production quota for the parts is $\qquad$ pieces.
【Solution】Solution: Let the original planned workload be to produce $x$ parts per day. According to the problem, we have:
$$
\begin{array}{c}
(x-3) \times 31+60=(x+3) \times 25-60 \\
31 x-93+60=25 x+75-60 \\
6 x=48 \\
x=8 \\
(8-3) \times 31+60 \\
=5 \times 31+60 \\
=215 \text { (pieces) }
\end{array}
$$

Answer: The original planned production quota for parts is 215 pieces.
Therefore, the answer is: 215.