MTU Detroit Diesel 183 Series Technical Publication page 225

Task Description
20080/1 E 98-12
Checking
Check valve springs with spring testing unit.
If limit values are exceeded, replace valve springs.
See Tolerance and Wear Limits List for limit values
(05-3133).
Check valve springs for indentations, flatness, burring
and deformation.
Flatness deviations of up to 0.2 mm on inner diameter
of end coils are permissible.
Springs with deformations and burring on spring turns
can continue to be used after burnishing.
Replace valve springs if necessary.
Installation
Insert washer for inner and outer valve spring.
Insert valve springs and valve spring retainer.
Notes
Install narrower end of valve springs in direction of
cylinder head.
Ensure washers for valve springs are correctly seated.
Set spring retainer clamp (11) according to valve spring
retainer (2) diameter.
Insert pressure rod (12) into lever eye (13) and press
down valve spring retainer (2). Insert taper elements
into groove of valve stem and unload pressure rod.
Note
Ensure parts are correctly seated.
Remove valve spring lever.
Group 05
Subgroup 3133
Page 3