Valtra 600 Operator's Manual page 79

Clean hydraulic pump suction
H 6.5.
strainer (29)
CAUTION: In work where the hydraulic system is
subjected to abnormally heavy pollution (e.g. when
running with tipping trailers) the suction strainer must
be cleaned at shorter intervals. If the pump begins to
"shriek", the engine should be stopped, the suction
strainer cleaned and the viscosity of the oil checked
against the manufacturer's recommendations.
Removing and cleaning
H 6.5.1.
--- Place the tractor with the front end higher so that less oil
runs out.
--- Loosen the wing nut on the end of the housing and
place a funnel or similar under the housing to collect up
the oil.
--- Remove the cover and drain off the oil into a suitable
container.
--- Carefully pull out the element.
--- Clean the element with diesel fuel and dry with
compressed air.
--- Also clean the magnetic plugs.
H 6.5.2.
--- Place the cleaned element in the housing
--- Replace the cover together with the seal and tighten the
wing nut by hand
--- Check the oil level in the hydraulic system.
CAUTION: Look for any foaming of the oil when
starting up again (check through the filling opening).
Foaming indicates that the cover seal is leaking and
must be changed or retightened.
Clean fuel tank (30)
H 6.6.
Always clean the fuel tank at the start of the winter
season. This avoids problems with condensation in the
fuel tank. Always make sure that the tank is as full as
possible so that condensation is prevented.
--- Empty the tank and rinse it with clean diesel fuel. Screw
in the drain plug again.
--- Fill up with new fuel (if you suspect that fuel is not clean,
use a fine gauze strainer).
WARNING! Never use spirit as anti ---freeze agent in the
H. Periodic maintenance
69---80
Fitting
fuel, as this could cause blockage of the fuel filter and
impair the lubricating properties of the fuel.
Change prefilter and fuel filter (31)
H 6.7.
Change prefilter
(distributor models)
2
1
NOTE: Remove the filter by hand, do not use a filter ---
wrench.
Turn the prefilter lock (2) to open and remove prefilter (1)
by pulling it downwards. Set new filter in place and turn
the prefilter lock (2) to the fasten direction until you hear a
click. Change the prefilter more often if needed.
Change fuel filter
Clean the outside of the filter and remove it. Oil the new
gasket and tighten the new filter by hand (not too tight).
Change the fuel filter more often if needed.
After changing the filter, pump up fuel with the hand pump
until the prefilter (distributor models) and the filter are filled
up. If needed bleed the fuel system (see under "Checks
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