330D, 336D and 340D Excavators Hydraulic System – Graphic Color Codes



Illustration 1 g01861138

(AA) Black … Mechanical connection or seal

(BB) Dark Gray … Cutaway section

(CC) Light Gray … Surface of the part

(DD) White … Atmosphere or air (no pressure)

(EE) Purple … Pneumatic pressure

(FF) Yellow … Moving parts or activated components

(GG) Green … Tank oil, suction oil, return oil, and case drain oil

(HH) Brown … Lubricating oil

(JJ) Green Stripes and White Stripes … Scavenge or suction oil

(KK) Red … High pressure oil

(LL) Red Stripes and White Stripes … Signal (First pressure reduction)

(MM) Red Crosshatch … Signal (Second pressure reduction)

(NN) Pink … Signal (Third pressure reduction)

(PP) Red and Pink Stripes … Secondary source of oil pressure

(RR) Orange … Pilot, charge, or torque converter oil

(SS) Orange Stripes and White Stripes … Reduced pilot, charge, or torque converter oil

(TT) Orange Crosshatch … Second reduction in pilot, charge, or torque converter oil

(UU) Blue … Trapped oil