Vintage Sony reel-to-reel tape deck repair. As usual with equipment like this, the mechanism needed hardened grease cleaned out followed by lubrication.

Tascam 42N-NB-- 2TR/2CH Professional Reel-to-Reel Tape Deck -Pro Refurb/ Mint Condition!!

Sony TC540 Reel To Reel Mechanism Service

Liquid Bearings Synthetic Oil For Tape Decks : Arts, Crafts & Sewing

Concord 994

The journeys of a vintage audio geek (Netherlands)

Audio

1971 Sony TC-540 Reel-to-Reel Tape Recorder Overhaul

Joseph Greco Photographer Blog - JOSEPH GRECO PHOTOGRAPHER

Sony TC-377 - UK Vintage Radio Repair and Restoration Discussion Forum

Kenwood Tape Deck