Pampu yamadzi ndi gawo la makina oziziritsa agalimoto omwe amazungulira zoziziritsa kukhosi kudzera mu injini kuti athandizire kuwongolera kutentha kwake, makamaka amakhala ndi lamba, flange, kubala, chisindikizo chamadzi, nyumba yopopera madzi, ndi impeller. Pampu yamadzi ili pafupi ndi kutsogolo kwa injini, ndipo malamba a injini amayendetsa.