Hi,
I don't know this area at all, but I have found "Pepper Hill" on a 1939 Map of Manchester, Salford and surrounding district. Its to the east of Clifton Junction, just north of where Lumns Lane meets up with Rake Lane.
You do get a few hits if you google "Pepper Hill" with "Rake Lane"
Including a link to the Alan Godfrey map people
http://www.alangodfreymaps.co.uk/lancs09516.htmTheir map guide gives lots of place names in that area, including (quote from the site)
"Acme Mill, Albion Mill, Albion Foundry, Hope Mill, Cyclone Works, St Peter's church, Swinton Schools (at foot of map), Albert Mill. The eastern half of the map, east of Bolton Road, includes Newtown Colliery with tramway, the disused Botany Bay collieries (at top of map), Pepper Hill, Pendlebury Colliery with tramway, Clifton Hall Colliery, Clifton Junction station"
Hope this helps

Barbara