A precleaner comprising: (a) a housing having a surrounding wall, an interior volume, an upstream flow face, and a dust outlet arrangement; (b) a plurality of at least two separator tubes in the interior volume; each separator tube having a vane arrangement for inducing cyclonic air flow within the tube flowing from the upstream flow face; a pre-cleaned air outlet; and a particulate outlet; (c) one or more channel arrangements in air flow communication with at least some of the particulate outlets to channel air flow and particulates from the particulate outlets toward the dust outlet arrangement; and (d) wherein the one or more channel arrangements being provided in addition to the housing and being close to, or attached to, the separator tubes and their inner end wherein a first channel arrangement is in air flow communication with the particulate outlet of at least a first separator tube, the first channel arrangement comprising at least one channel wall; wherein at least one of the channel walls includes: (i) a first wall section proximal to a respective separator tube; (ii) a second wall section angled at a non-zero angle relative to the first wall section; (iii) wherein the first wall section is angled relative to a longitudinal plane extending perpendicular to a top and bottom of the housing, as the first wall section extends away from and toward the dust outlet arrangement of the housing; and (iv) wherein the second wall is angled relative to the first wall section, as the second wall section extends away from the first wall section and toward the dust outlet arrangement of the housing. (a) a housing having a surrounding wall, an interior volume, an upstream flow face, and a dust outlet arrangement; (b) a plurality of at least two separator tubes in the interior volume; each separator tube having a vane arrangement for inducing cyclonic air flow within the tube flowing from the upstream flow face; a pre-cleaned air outlet; and a particulate outlet; (c) one or more channel arrangements in air flow communication with at least some of the particulate outlets to channel air flow and particulates from the particulate outlets toward the dust outlet arrangement; and (d) wherein the one or more channel arrangements being provided in addition to the housing and being close to, or attached to, the separator tubes and their inner end wherein a first channel arrangement is in air flow communication with the particulate outlet of at least a first separator tube, the first channel arrangement comprising at least one channel wall; wherein at least one of the channel walls includes: (i) a first wall section proximal to a respective separator tube; (ii) a second wall section angled at a non-zero angle relative to the first wall section; (iii) wherein the first wall section is angled relative to a longitudinal plane extending perpendicular to a top and bottom of the housing, as the first wall section extends away from and toward the dust outlet arrangement of the housing; and (iv) wherein the second wall is angled relative to the first wall section, as the second wall section extends away from the first wall section and toward the dust outlet arrangement of the housing. (i) a first wall section proximal to a respective separator tube; (ii) a second wall section angled at a non-zero angle relative to the first wall section; (iii) wherein the first wall section is angled relative to a longitudinal plane extending perpendicular to a top and bottom of the housing, as the first wall section extends away from and toward the dust outlet arrangement of the housing; and (iv) wherein the second wall is angled relative to the first wall section, as the second wall section extends away from the first wall section and toward the dust outlet arrangement of the housing.