Changing Crankshaft Ring Gear (420; Fitting Crankshaft - Valtra VALMET Series Workshop Manual

21. Engine
2. Clean the seat on the crankshaft with, for example, a wire
brush.
3. Heat the new gears to 200˚ C. Tap them onto the shaft with
a suitable sleeve or soft drift. Note the position of the key and
ensure that the aligning marks on the front gear are visible.
Leave it to cool.
D. Changing camshaft
(420---engines only)
20˚
1. Mark the position of the ring gear on the shaft.
2. Heat the ring gear with a welding torch and drive it off using
a suitable drift.
3. Heat the new ring gear to max. 250˚C. Fit the ring gear with
the chamfer facing the crankshaft flange, and with the teeth
according to markings or according to figure above. Tap the
ring gear down and leave it to cool.
Note! The figure above shows a rear view of the crankshaft
and no 2 cylinder big end bearing journal.
E. Fitting crankshaft
1. Clean the oilways, bearing shells and bearing locations.
Check that the crankshaft is clean.
ring gear
https://www.truck-manuals.net/
58
Model
6000-- 8750
1. 9. 1992
2. Fit the bearing shells into the cylinder block and the bearing
caps. Ensure that the bearing shell clamping claws fit into their
notches and that the shells to be fitted in the cylinder block
have a hole coinciding with the oil port.
3. Lubricate the bearing surfaces and fit the crankshaft. Fit the
crankshaft thrust bearings with the lubricating grooves facing
the crankshaft.
4. Fit the main bearing caps according to their numbering, the
rear with thrust bearings provided with guide lugs. Lubricate
the bolts and tighten them to 200 Nm.
0,10-- 0,35 mm
5. Check that the crankshaft can rotate without binding.
Check the end float using a dial gauge. The correct end float
is 0,10 ---0,35 mm. If the end float is too large, oversize thrust
bearings should be fitted.
Note! Bearing shells should never be reamed or machined in
any other way, nor should the sides of the bearing caps be
filed
Code Page
213 2
200 Nm