He mea motuhake te Mīhini Pēhi Wera mō ngā papa pēhi o ngā motopaika, ngā waka pāhihi me ngā waka arumoni. He tukanga nui te pēhi wera i roto i te hanga papa pēhi, e whakatau ana i te mahi whakamutunga o ngā papa pēhi. Ko tana mahi tūturu he whakamahana me te whakamaroke i te rauemi waku me te pereti o muri mā te whakapiripiri. Ko ngā tawhā tino nui o tēnei tukanga ko: te pāmahana, te wā huringa, te pēhanga.
He rerekē ngā tawhā o ia tātai, nō reira me whakatakoto ngā tawhā ki te mata matihiko kia rite ki te tātai i te whakamahinga tuatahi. Kia oti ngā tawhā te whakatakoto, me pēhi noa i ngā pātene matomato e toru i te papatohu hei whakahaere.
Hei tāpiritanga, he rerekē te rahi me te hiahia pēhi o ngā papa pēhi rerekē. Nō reira i hangaia ai e mātou ngā mīhini me te pēhanga i roto i te 120T, 200T, 300T me te 400T. Ko ō rātou painga ko te iti o te whakapaunga pūngao, te iti o te haruru, me te iti o te pāmahana hinu. Kāore he hanganga flange o te rango-wai matua hei whakapai ake i te ātete ki te turuturu.
I taua wā, ka whakamahia te maitai koranu pakeke mō te tokotoko piston matua hei whakanui ake i te ātete ki te kakahu. He ātete puehu te hanganga kua kati katoa mō te pouaka hinu me te pouaka hiko. Heoi anō, ka utaina te maitai pepa me te paura papa parai ki waho o te mīhini hei whakarite i te haumaru o te mahi.
I te wā e pēhi ana, ka raka aunoa te pokepokea o waenganui kia kore ai e turuturu te rauemi, he mea pai hoki tēnei hei whakapai ake i te ataahua o ngā papa. Ka taea te neke aunoa i te pokepokea o raro, te pokepokea o waenganui, me te pokepokea o runga, ka taea ai te whakamahi pai i te wāhi pokepokea, te whakapai ake i te kaha whakaputa me te penapena mahi.