TOHATSU MD 30B2 Service Manual page 195

8) Inspection of Water Pump
1. Check pump case liner 1 and guide plate 2 for
deformation and wear.
Replace if necessary.
2. Check pump impeller 3 for crack, damage and wear.
Replace if necessary.
· The impeller may show gloss or have melted
area if it is rotated with insufficient water.
· Even if impeller shows no abnormality on its
surface, the blade(s) may be separated from the
hub.
· Replace guide plate if a groove(s) of 0.5 mm or
over is produced on it due to wear by impeller.
3. Check impeller key 4 and key groove for wear.
Replace if necessary.
9) Inspection of Water Pipe
1. Remove water pipe 1 from drive shaft housing.
Refer to 7-27.
2. Check water pipe 1 for corrosion, deformation and
stuffing.
· For WD50 ;
Extension water pipe 2 and joint hose 3
are in the extension housing. Refer to 7-21
"Assembling Extension Housing" and inspection
and assembly.
TLD D30/40/50B2 2013
1
4
1
3
2
OBM OBM
OBM
6
1
3
2
6-17