Pac Brake also sells its lubricant. And importantly there is a very small air filter on the back side of the pac brake, towards the coach rear, that often times is missing and needs to be replaced. Lubricant, a couple of drops goes into that orfice plus the other shaft points to insure it does not freeze up. I personally do it about once a year although it is recommended every 6 months. I also leave the pac brake on all the time except in mountains or in heavy rain or ice/snow so it is in operation on a regular basis. When only used occasionally lubricant needs to be done more frequently.
2001 36 MDDS
03 Honda Pilot toad