66
4.
Pull off the crankshaft drive gear with puller 2658.
5.
Camshaft drive gear.
6
Injection pump drive gear. If necesssary use stand-
ard puller 2679 with hex socket screw 952076-8.
2658
Replacing timing gears
When replacing the compressor and/or the power steer-
ing pump on a factory overhauled engine, it is impor-
tant to check the data plate to make sure which type of
timing gear was installed at the overhaul.
A nitro-carburized gear (“N”) must not mesh with a
hard-tough gear (“HT”), but on the other hand, a case-
hardened gear (“CH”) can be combined with a nitro-
carburized gear (“N”).
Avoid combination “N”/“HT” when replacing timing
gears on earlier engines.
Nitro-carburized gears are easily recognized by their
flat grey to grey-yellow colouring. Moreover they are
marked either with a white spot, or an “N” or “Nitro”
punched into the gear.
7.
Remove the oil pump intermediate gear.
952076-8
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