He had to waste to make Berkshire Breeze's weight of 54.5kg and said it was great to be rewarded.
"It makes the hard work worthwhile," Brown said.
"It's certainly a thing I don't do week in, week out but I had a handful of good rides today and I thought I'd put in the extra effort, so I'm glad it's paid dividends."
Saturday's treble was Brown's sixth at city level and second on a Saturday, but first at Flemington.
Berkshire Breeze, an import who has now won three in a row in effortless style, has the youngster excited ahead of the Spring Carnival.
"I wanted to see him do it again today and he certainly done it, so I think he's cemented himself as a spring horse off the back of that," Brown said of the grey, who is now a $15 chance in Melbourne Cup betting.
The other staying race on the card was the $200,000 Mahogany Challenge Final (2500m) for three-year-olds, which Brown won aboard lightly-raced Real Steel gelding Steel Run for his former master Mick Kent.
