LUBRICATING SYSTEM - L7
LUBRICATING OIL FILTERS
To ensure cleanliness of the lubricating oil a sump
strainer and a main full flow type of oil filter are fitted.
The sump strainer consists of a gauze wire container
which is fitted over the end of the lubricating oil pump
suction pipe. All oil must pass through this strainer
before it reaches the oil pump, this ensures that no
foreign matter reaches the pump which could cause any
damage. It is recommended that this strainer is
removed and thoroughly cleaned every time the sump is
removed.
The main full flow type oil filter is mounted externally
on the side of the cylinder block. All the oil passes
through this filter after it leaves the pump, but before it
reaches the bearings. This filter utilizes a replaceable
paper filter element on earlier engines or a spin-on
canister type having an integral element on later engines
and no attempt should be made to clean it. It should be
replaced by a new one in accordance with Preventive
Maintenance recommended on Page C.3.
To Renew Spin-on Oil Filter Canister
1.
Unscrew filter canister from side of oil cooler
(see Fig. L.12).
2.
Discard old canister.
3.
Clean head of oil cooler.
4.
Using clean engine oil, liberally oil top seal of
replacement canister.
5.
Fill new canister with clean lubricating oil
allowing time for the oil to filter through the
element. Screw replacement canister on to end
of the oil cooler until the seal just touches cooler
head. Then tighten as per instructions on
Fig. L.12.
Removing Lubricating Oil Spin-on Canister.
(lowline engines)
Fig. L.13.
Removing the Lubricating Oil Filter Bowl
Securing Screw.
(Replaceable element type)
canister. Where a tool is available tighten to 15
Ibf ft (2,07 kgf m) - 20 Nm.
6.
Run engine and check for leaks.
NOTE: Oil filter canisters have internal
valves to prevent oil drain back and a special
tube stack is fitted, so always ensure that the
correct replacement is fitted.
To Remove the Filter Element
(earlier engines)
1.
Clean the exterior of tile filter bowl.
2.
Unscrew the filter bowl securing bolt as shown in
Fig. L.13. A suitable container should be placed
beneath the filter to catch the oil in the bowl as
the securing bolt is slackened.
3.
Ease the filter bowl clear, lift out the old element
and discard.
NOTE: Ensure that the top edge of the filter
bowl is not damaged in any way during
handling, otherwise it may be difficult to
obtain an oil tight seal when it is refitted,
even when using a new sealing ring.
To Renew the Filter Element (earlier engines)
1.
Clean out the filter bowl using cleaning fluid.
2.
Fit the new element so that it locates correctly
on the spring loaded guide in the base of the
container.
3.
Fit the new container seal in the filter head
ensuring that it is correctly located in its groove.
