According to a new class action lawsuit, obtained by TMZ, two women named Kathleen Faber and Lexis Mays say they returned to work at McDonald's after giving birth and are apparently running into obstacles when it comes to pumping breastmilk for their babies.

The women say they told their managers they would need to pump at work and claim they were told it wouldn't be an issue ... but they say that's turned out not to be the case.

Faber claims her McDonald's in Kansas has no secure, private space for her to pump breast milk, leaving her to pump milk from the corner of a stock room so she can avoid the sight lines of security cameras and male employees.

Mays says her McDonald's in New York doesn't have a secure, private space to pump either ... she claims she's been left to pump from a back office that doesn't have a door and is wide open to other crew members, who she says come in the room when she's pumping.

In the suit, both women also say they don't have enough break time to pump breast milk during their shifts at the Golden Arches.

Faber and Mays say the lack of breastfeeding accommodation at McDonald's is causing them anxiety, discomfort, humiliation, embarrassment and emotional distress.

The women say McDonald's is not complying with federal laws requiring secure and private places for breastfeeding mothers to pump in the workplace ... and they want a court to step in and help them and all similarly situated employees.