I'm unfamiliar with the machine but if it has hydraulic brakes you may have air or moisture in the brake lines. You can try bleeding them or better yet do a complete flush.
Ah - Its been a long time since I've heard mention of a Nodwell. During oil exploration in AK the Nodwell & Thiokol were the vehicles of choice. I agree - a complete flush of the hydraulic braking system(s) is in order.