That would certainly be the desire, but I expect the Russians would initially lack the resources to do so effectively. OTL the Russians were forced to employ a lot of locals to manage their limited interests in the East, due to inability to encourage Russians to do so. I understand Manchuria was subject to mass Chinese migration in the late 19th Century. Previously sparsely populated, the Chinese deliberately encouraged migration to Manchuria impair the potential colonial encroachment. I also understand migration from Korea during the early 20th century was substantial.
Rather than Russification, the Russians would first need to limit the influence of the Chinese, Japanese and other colonial powers encroaching on Manchuria. I expect the Russians would make serious efforts to coerce substantial populations European Russians to Asia, which might initially include less restrictions on language, culture and religion - thereby encouraging Russian minorities to migrate East to avoid persecution.