In te keri kohatu mārō i raro i te whenua, ko te whai huatanga me te pumau te mea e whakatau ana i te ahunga whakamua o te kaupapa. Ko teYT29A wiri toka hauHe tino pai i roto i tēnei taiao nā tōna kaha pānga me te tautoko pumau o te waewae-hau. Ina keri ana i ngā kōhao pupuhi hohonu i roto i ngā maina koura me ngā uaua konganuku, ka whakapotohia e te YT29A ngā huringa keri me te whakaiti i te kawenga mahi a te pūhiko.

E mihi ana ngā kaiwhakahaere ki ngā YT29Amahi pono i raro i te haumākū nui me te puehu, ngā āhuatanga noa i raro i te whenua. Nā tōna pakari ka whakaiti i ngā wā tiaki, ka waiho hei otinga utu-whai hua mō ngā mahi keri tonu.

I runga i tēnei turanga pakari, kua hangaia te YT29A mō te tika me te whakamarie o te kaiwhakahaere, e whai hua tika ana ki te hua o te papaanga. Ko tana pūnaha takirere ā-roto kua arotauhia ka tukuna he patu piston kaha, pumau, kia tere ake ai te urunga ki roto i ngā hanganga granite me te basalt tino uaua. Ka hua ake tēnei i ngā kōhao pupuhi ma, ka taea te matapae, he mea nui mō te wehewehenga whai hua me te whakahaere i ngā kōtaha kauhanga. Ka whakaratohia e te waewae-hau whakauru he pumau tino pai, ka whakaiti i te ngenge o te kaiwhakahaere i ngā nekehanga roa, ā, ka taea te whakarite tika ake i ngā kōhao. Mā tēnei tika ka whakaitihia te pakaru nui me te moumou kaha, ka whai wāhi tika ki ngā tere whakamua haumaru me te whai hua ake.

Haunga te mana parakore, ko te hoahoa o te keri e whakatairanga ana i te ngāwari o te mahi. Ko ngā wāhanga matua pēnei i te chuck me te piston he mea hanga mai i ngā koranu kua whakapakeketia kia tu atu ki ngā matūriki whakakoi. Mā te whakatakotoranga māmā, wātea hoki ka taea e ngā kaimahi te mahi tirotiro auau me te whakakapinga wāhanga tere, ka whakaiti i te wā kore mahi o te mīhini. Ki ngā kaiwhakahaere maina, he painga pūtea nui tēnei pono. Ko te iti o te whakamahinga hau o te YT29A ehara i te mea ka whakaiti i ngā utu pūngao engari ka taea hoki e ngā pūnaha compressor o nāianei te tautoko i ngā keri maha i te wā kotahi, ka whakanui ake i te hokinga mai o te haumi hanganga. I roto i tētahi ahumahi e whai tikanga ana ia haora o te mahi, ka kitea te YT29A ehara i te mea he taputapu noa iho—he rawa rautaki mō te whakatere i ngā huringa whanaketanga me te whakarite i te oranga ōhanga o ngā kaupapa whenua raro whenua e hiahiatia ana.