oilbox
nounEtymology From oil + box.
1
A container or reservoir for lubricating oil.
- The coupled axleboxes are fed at the crown by feeds from the engine oil mechanical lubricator, and this eliminates the large multi-feed oilboxes previously fitted in the cab. […] Small auxiliary oilboxes with trimming feeds supply the axlebox guides and also the piston rod swab-boxes.1956 April, “"Merchant Navy" Class Pacific Modified”, in Railway Magazine, pages 211, 212: