AJS 350 1954, Maintenance Manual And Instruction Book, Page: 19 / 96

A metal gauze strainer is secured in the tank end of the feed pipe union.
After the first 500 miles, again at 1,000 miles, and subsequently at 5,000 mile intervals,
it is recommended that the oil tank is drained, the oil filters cleaned in petrol and the
tank replenished with new oil.
TO REMOVE THE FELT OIL FILTER
Unscrew the hexagonal headed cap on the top of oil tank and withdraw the dished
washer and spring. Then insert a finger in the exposed open end of the felt filter and
gently raise. As the filter emerges from the tank gently strain inward and backward on
rigid frame model to clear the saddle frame or outward and forward on spring frame
model to clear the twin seat. Care in this operation is necessary to avoid kinking the
filter,
To re-fit filter :—
Reverse above instructions.
NOTE—If, after the filter has been removed from the tank, it is damaged, so that the
felt is perforated, or the ends distorted, it is essential to discard it and to fit a
new filter.
Be careful to avoid damaging the filter or the cork washer under the hexagonal
cap.
To remove and clean the feed pipe metal filter :
Release the oil feed pipe from the rubber connecting sleeve on the metal feed pipe
protruding from the bottom of the oil tank.
The metal filter may come away with the rubber sleeve, in which case there is no need
to disturb it. On the other hand it may remain in the oil tank bottom pipe, in which
case it may be withdrawn by grasping the ringed open end and pulling away,
After removal the filter should be cleaned in petrol and allowed to dry before re-fitting.
Reverse the above procedure to re-fit the filter and pipes.
ADJUSTMENT OF OIL FEED
The internal flow of oil is regulated by fixed restrictions. No adjustment Is provided
except for the oil feed to the inlet valve stem. This adjustment Is made by a needle
pointed screw located in the right side of cylinder head. (See Illustration 5.) It is
locked in position by a nut. The approximate correct setting is one-sixth of a complete
turn from the fully closed position. Once set it requires little, or no, adjustment.
Inlet valve squeak indicates the oil feed adjustment is not open enough. Excessive oil
consumption, a smoky exhaust or an oiled sparking plug, generally indicates the oil
feed adjustment is open too much.
EXHAUST VALVE STEM LUBRICATION
The exhaust valve stem is lubricated by oil flowing through a passage drilled in the
cylinder head. No adjustment is provided.
LUBRICATION POINTS TO REMEMBER
A dirty, or choked, felt oil filter causes heavy oil consumption. This is because the
return flow of oil to the oil tank is reduced, thereby allowing an excess of oil to " build
up " in the crankcase sump, much of which passes to the piston.
A clogged metal strainer, in the gravity feed pipe, will also cause improper, or no, oil
circulation, This can only occur as the result of adding dirty oil when replenishing the
tank.
Both end caps on pump plunger housing must be air-tight.
Check oil circulation before starting each run.
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