English to Spanish Tech/Engineering Mechanics / Mech Engineering Bucket elevator inspection

Hi! I need a Spanish translation for "head spouting liner". I'm translating a video on bucket elevator inspections.

Here's the context:

00:16:41:15 00:16:44:26
"Liner Inspection"

00:16:44:27 00:16:47:14
While inspection covers are open,

00:16:47:15 00:16:51:24
we next want to inspect
the condition of the head spouting liner.

00:16:51:25 00:16:54:21
To assist in assessing liner
and spout wear,

00:16:54:22 00:16:57:26
find a point that looks like
it's in original condition.

00:16:57:27 00:17:01:25
Use that area as a point of reference
for estimating liner and spout wear

00:17:01:26 00:17:03:23
in areas of high product contact.
.........................................................

Thanks!
Mirela