Does anyone own 2005 Gravely Z and know where are zerk fittings on unit? I just got 152 Z, and I can not find a single zerk fitting to lubricate. The manual said repacking two caster pivot @ 400 hrs, and applying oil at all pivot points & pin connections @ 50 hrs...I want to know what oil they talking about? Can we use wd 40 to spray into caster wheel bearings & axle...and those belt pulleys? BTW, 152 z is awesome and sweet. Thank you.