Instruction manual

ManualsBrandsA.J.S. ManualsAutomotive18S

A metal gauze strainer (secured to the feed pipe union) stands in the oil tank.

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.

For access to oil filter :—

Unscrew the hexagonal headed cap on top of oil tank and withdraw the dished washer

and spring. Then insert a finger in the felt filter and gently raise same until the

top end touches the underneath of saddle. Then by encircling the filter with the hand it

will be found possible to exert sufficient upward pressure on the flexible saddle top to

permit the filter to be completely withdrawn without distortion. Care is needed 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.

For access to metal strainer (after oil has been drained from tank) :—

Remove oil feed pipe from union screwed into bottom of oil tank. This is pipe nearer

to rear wheel and is removed by unscrewing its union nut.

Spring away pipe from union.

Unscrew union from bottom of oil tank. Metal strainer is integral part of this union.

To re-fit metal strainer :—

Reverse above instructions.

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 6.). 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 fed through a passage drilled in the cylinder

head. No adjustment is provided. All excess oil is by-passed back to the timing gear

case.

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 slowed, or even almost completely stopped, 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.