MTU Detroit Diesel 183 Series Technical Publication page 529

Task Description
Disassembly
Using the removal tool, pull off flange (7).
Using circlip pliers, take the snap ring (2) out of the coolant pump housing.
Using a suitable thrust pad, force the pump bearing and shaft (3) - assembly unit - out of the impeller and pump
housing.
Remove modular rotary seal (4 or 5) from pump housing.
Inspection and repair
Clean all components.
Using the surface crack-testing method and red penetrant dye, check the pump housing, impeller and flange for
cracks.
Using the magnetic crack-testing method and fluorescent magnetic powder, check the pump bearing and shaft for
cracks.
If cracks are detected, replace complete bearing with shaft.
Check coolant pump housing and impeller for pitting.
Replace parts if pitting is deeper than 1 mm.
Check coolant pump for wear and damage.
Smooth minor traces of wear and damage with an emery cloth.
Always replace pump bearing with shaft during W6 overhaul.
Replace modular rotary seal during overhaul.
20080/1 E 98-12
Group 20
Subgroup 1401a
Page 3