1. He iti rawa te āputa radial o te peera:

Nā te mea he nui te kawenga o te peera e whakamahia ana i roto i te mata wiri, ā, he nui te auau, ā, kei te huri tonu te kawenga, ki te iti te ātea o te peera, ka raru pea te whakamahana, ka pā ki te whakamahinga noa.

Mō tēnei raruraru, ka taea e tātou te whiriwhiri i ngā peera he nui ake ngā āputa. Mena he peera noa te mea e whakamahia ana, me mau te mowhiti o waho kia nui ai te āputa.

2. Kāore i te pai te whakahinuhinu o te peera:

Mā te ngaronga o te hinu whakahinuhinu i roto i te peera, mā ngā poke rānei i roto i te hinu whakahinuhinu ka kino te oma o te peera, ka wera ai hoki.

Mō tēnei raruraru, me tirotiro tonu te hinu whakahinuhinu o te peera. Mēnā ka kitea he iti iho te hinu whakahinuhinu, he iti iho rānei ngā poke i roto i te hinu whakahinuhinu, me tāpiri, me horoi rānei te peera.

3. He tino pūmau rawa te pēhi i te taupoki peera:

Me whai wāhi motuhake te repe me te mowhiti whāriki. Mēnā he tino kikī te pēhanga, ka ngoikore te tohatoha wera me te tuku axial, ā, ka puta te wera.

Mō tēnei raruraru, ka taea te whakarite i te gasket i waenganui i te repe me te whare. I tētahi atu taha, ko te take o te whakaputanga wera ko te kounga me te pakaru o te peera.

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