Kubota ZD221-48 Workshop Manual page 74

ZD221, WSM
ENGINE
Symptom Probable Cause Solution
Reference
Page
Engine Revolution Is Fuel filter clogged or dirty
Replace G-38
Not Smooth
Air cleaner clogged Clean or replace G-29
Fuel leak due to loose injection pipe retaining nutfTighten retaining nut
1-S25
Injection pump malfunctioning Replace 1-S29
Incorrect nozzle opening pressure
Adjust 1-S19
Injection nozzle stuck or clogged Replace 1-S25
Governor malfunctioning Repair 1-S32
Either White or Blue Excessive engine oil Reduce to specified G-16
Exhaust Gas Is level
Observed
Piston ring and cylinder worn or stuck Replace 1-S34,35
Incorrect injection timing Adjust 1-S17
Either Black or Dark Overload Lessen the load
-
I
Gray Exhaust Gas Is
Observed
Low grade fuel used
~se specified fuel
-
Fuel filter clogged Replace G-29
Air cleaner clogged Clean or replace G-29
Deficient nozzle injection Replace nozzle 1-S25
W1014322
1-S2