Collins Chinese Dictionary Plus (3rd edition), 2011:
maintenance [ˈmeɪntənəns]
n
[u]
1
(=running)
[of building, equipment] 保养(養) bǎoyǎng
[of building, equipment] 保养(養) bǎoyǎng
2
(=preservation)
[of peace, system] 维(維)持 wéichí
[of peace, system] 维(維)持 wéichí
3 (Law) (=alimony) 赡(贍)养(養)费(費) shànyǎngfèi