Camshaft - Valtra 6000 Workshop Manual

21. Engine
H. Timing gears
(Timing gears, see page 214/1)
As the timing gear casing forms a seal against the oil sump,
the casing cannot be removed without first removing the oil
sump. The timing gear casing cover, however, can be
removed without removing the oil sump.
--- Remove the oil sump if the timing gear casing is to be
removed. Otherwise remove the cooling radiator only.
--- Remove the fan, alternator and the v ---belt.
--- Unscrew the crankshaft nut and remove the belt pulley/
hub. On 620 ---engines, the belt pulley should be removed
before unscrewing the nut.
--- Remove the timing gear casing front cover and remove the
oil deflector ring at the front end of the crankshaft.
--- Remove the fuel injection pump if the timing gear casing is
to be removed. Otherwise disconnect all the pipes from the
fuel injection pump.
--- The timing gears are now accessible.
In addition, the following steps should be taken if the entire
timing gear casing has to be changed:
--- Unscrew the idler gear fixing bolts and remove the idler
gear.
--- Pull out the camshaft from the cylinder block.
Note! If the cylinder head and valve mechanism have not
been removed, the tappets must be prevented from falling
down when the camshaft is removed, see page 212/5.
--- The timing gear casing can now be removed.
1. 9. 1992
I. Camshaft
(Camshaft, see page 212/5)
Before removing the camshaft the following steps should be
taken:
--- Remove the timing gear casing cover (see under previous
heading H Timing gears).
--- Remove the idler gear
--- Remove the valve cover and the rocker arm mechanism.
--- Support the pushrods (at the same time tappets which are
against the camshaft) to the upper position in pairs by using
for instance o---rings (see picture on page 212/5).
--- Rotate the crankshaft so that the timing markings on the
crankshaft gear and the camshaft gear become opposite
each other (see picture on page 214/2).
--- Pull out the camshaft from the cylinder block.
Note! Take care when fitting the camshaft that the timing
marks align.
84
Model Code
6000-- 8750
219
Page
2