Ka werohia te hau kore mahi ki roto i te puna, ā, ka puta te hua he mahi rapa mā te piston. Kāore e hiahiatia he mana o waho mō te hua, he kaha hiki pumau, ā, ka taea te whakawhānui me te whakawhāiti noa. (Ko tepuna hau raka(ka taea te whakanoho noa) He whānuitia te whakamahinga, engari me mārama ēnei āhuatanga i te wā e tāuta ana:
1. Tepuna hauMe tāuta te tokotoko piston ki raro, kaua ki raro, kia whakaitihia ai te waku, kia pai ai te kounga o te whakamākū me te mahi whakaruruhau.
2. Ko te whakatau i te tūranga tāutanga o te pūtahi te taurangi mō te mahi tika o te puna hau. Me tāuta te puna hau i te huarahi tika, arā, ina kati, tukua kia neke atu i te rārangi pokapū o te hanganga, ki te kore, ka pana aunoa te puna hau i te tatau kia tuwhera.
3. Tepuna haukaua e pāngia e te kaha honga, e te kaha taha rānei i te wā e whakamahia ana. Kaua e whakamahia hei pupuri ringaringa.
4. Hei whakarite i te pono o te hiri, kaua te mata o te tokotoko piston e pakaru, kaua hoki te peita me ngā matū e pania ki te tokotoko piston. Kāore hoki e whakaaetia kia tāutahia te puna hau ki te tūranga e hiahiatia ana i mua i te rehu me te peita.
5. He hua pēhanga teitei te puna hau, ā, e tino rāhuitia ana te tapatapahi, te tunu, te kuru rānei i te mea e pai ana.
6. Kāore e whakaaetia te huri i te tokotoko piston puna hau ki te taha maui. Mena me whakarerekē te ahunga o te hononga, ka taea anake te huri ki te taha matau. 7. Te pāmahana taiao mahi: － 35 ℃ － ＋ 70 ℃. (80 ℃ mō te hanga motuhake)
8. I te wā e tāuta ana i te pūwāhi hononga, me huri ngāwari, me te kore e aukati.
9. Me tika te rahi kua tīpakohia, me tika te kaha, ā, me 8mm te tawhiti mō te rahi o te whiu o te tokotoko piston.
Wā tuku: Whiringa-ā-rangi 21-2022