53
Valve springs, checking
Check valve springs loaded and unloaded length with
a spring test.
The springs should have the values given in the
Workshop manual “Technical data”.
Copper injector sleeves,
replacing
Special tools 31/32/41/42/43 series: 884 931, 884945,
885 289
44/300 series: 885 237, 885 260, 885 289
Replacing the copper sleeves can be carried with or
without the cylinder head installed.
Cleaning the copper sleeve seat using a nylon brush
can be carried out with the cylinder head installed.
Repair Instructions
Applies to 31/32/41/42/43 series
1
Pull out the steel ring above the copper sleeve by ex-
panding tool 884 931 just under the ring.
NOTE! To prevent the extractor stem from damage
when extracting, the crank must be held and the tight-
ening carried out with a nut.
The nut should do the work.
Applies to all engines
2
Press out the copper sleeve with drifts 884 931
(31/32/41/42/43 series) and 885 260 (44/300 series).
Press the extractor stem to the bottom of the copper
sleeve. Hold the extractor and screw the stem coun-
ter-clockwise until the tool grips the copper sleeve se-
curely.
When the tool has a secure grip in the copper sleeve,
the sleeve is pulled out by screwing the nut in at the
same time as stem is held.
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