Xinchai 490B Series Manual page 31

4.8 Draining Out Coolant
银Note: the coolant should not be drained when the engine is still hot and the system is
still pressurized. It's very dangerous to drain the coolant under high temperature and high
pressure.
1尧 Make sure that the vehicle or the machine is standing horizontally.
2尧 Open the filling cap of the radiator.
3尧 Put a container under the drain cock. Open the drain cock by the side of the cylinder
block to drain out coolant.
4尧 Open the drain plug at the radiator bottom to drain out water in the radiator. If the
radiator does not have a drain plug, just dismantle the hose from the bottom of the
radiator.
5尧 Clean the cooling system with clean water.
4.9 Renew Spin-on Fuel Filter
1尧 Clean the surface of the fuel filter.
2尧 Loose drain device at the filter bottom. Drain
water /fuel into a container.
3尧 Dismantle the filter with special spanner shown or
some other similar tools.
4尧 Threaded adaptor should be tightly fixed with the filter cover. Be sure to keep the
inside of filter clean.
5尧 Smear the sealing of the new fuel filter with a little clean fuel. Tightly fix the new
filter on to the filter cover.
6尧 Expel the air in the fuel filter.
4.10 Renew Oil Filter
1尧 Put a pan under the oil filter to collect the oil draining out.
2尧 Dismantle the oil filter with special spanner or other similar tools. Make sure that the
adaptor is tightly fixed in the filter cover.
3尧 Clean the filter cover.
3尧 Fill clean lubricating oil into the new filter.
4尧 Smear the sealing of filter with clean lubricating oil.
5尧 When installing the new filter, after turning tight by hand it can be further screwed in
by only 3/4 turn. Much care should be taken when using the spanner to avoid
damaging the sealing.
6尧 Make sure there is lubricating oil in the oil sump.
7尧 Operate the engine and check if there is leakage from the filter. After the engine stops
for a while, check the oil level with the oil gauge, fill more lubricating oil if necessary.
4.11 Adjustment of Valve Clearances
After repairing or technical maintenance, valve clearances of the engine should be
checked and adjusted.
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