This happens to my 36' DP occasionally and it always goes away, sometimes it shifts and pulls) to the other side. I think, on mine, it may be a dust issue and I blow the brake area out a little with compressed air. Take a look and if the problem isn't obvious "keep on truckin".
On my Freightliner chassis, the "S" cams that move the brake shoes needed lubrication. My right side front would not apply the brakes, therefore pulling to the left. If enough force was applied, the right brake would emit a loud "bang" and the right brake would apply.
The cure was removing the wheel, and applying a little high temp grease to the "S" cam and the associated rollers. It's a do it yourself job if you're careful. You don't have to lift that wheel, just ease it off when it's just a small height above the ground.
On mine, you loosen the lug nuts (an 8 ft breaker bar helps a lot), jack it up, remove the lug nuts , remove the wheel, slide the brake drum off the studs, and then you're looking at the S cam, shoes, and rollers.
To help get the wheel back on the studs, use a board or pry bar to help lift the wheel.
Fred & Vicki
Richmond Hill, Ga
2000 Holiday Rambler Endeavor/Freightliner/330 Cat
2000 Honda Odyssey toad w SMI Silent Partner braking system
My motorhome started doing the same thing. Shortly after it started, and before I took it in for service, I replaced all six tires. When they got the tires off the installer pointed out that a seal of some sort has blown on the left front wheel. Grease was all over and I suspect is getting into the brakes causing the left front brake not to work well which is why it's pulling to the right. This is just my theory as after I got the tires on I put the motorhome back in my shop because I haven't had time to take it to Frieghtliner yet. It needs a full service anyway so I'm going to take it in in the next week or two and get everything checked.
I took my rig in yesterday and got it back today. Problem was just as I assumed. Grease from the leaky seal got into the brakes. Cost to fix was $360. That included fixing the seal and replacing the brake pads. They tell me that once grease or oil soaks into the brake pad they have to be replaced so I had them do that too. On the drive back from the shop I noticed it would still pull a little to the right when braking, but I'm going to assume that's just because the brand new pads on the left need some breaking in.
2004 National Tropi-Cal T-350, Class A, Triple slide, 330 HP Cat DP. 2006 Dodge Dakota 4x4 or
2002 Harley FLSTF Fat Boy on a Trailer or
2004 Polaris Quad on the Trailer