Firestone: W01-358-8852
fuel-only counterpart to fuel/water-separator FS1231
Oil dripping or pooling at the rear of the engine near the flywheel housing
International / Navistar: 1685159C91
Donaldson: P550733
Power Products HT1219 Air Tank – 12" Diameter x 29.5" Steel Air Brake Reservoir Kenworth Firestone: W01-358-8852Power Products HT1219 steel air brake reservoir 12" diameter, 29. 5" mounting hole center to center, 2,850 cu in capacity. Aftermarket replacement for Fontaine Trailer 51475005, Automann 172. 2007, and Sirco AT1219. Twin 3 4" NPT main ports (same side, opposite ends), 3 8" end port, 1 4" drain, F style inverted flange brackets, DOT compliant. Signs You Need a New Air Tank Visible rust, corrosion, or pitting on the tank body Air leaks at ports, welds,