Engine Lubrication - Matchless Super Clubman G9 1955 Instruction Book

ENGINE LUBRICATION SYSTEM
This is of the dry sump type.
delivery and the other for returning oil to the tank.
pump, by which it is forced, under pressure, to various parts of the engine, from whence
i t drains back to the crankcase sump to be collected by the return pump and returned
to the tank. The return pump has a much larger capacity than the delivery pump to
ensure that the crankcase is kept clear of excess oil.
Showing Delivery Oil Pump (on the right) and the Return Oil Pump (on the left)
1 BALL, FOR NON-RETURN VALVE.
2 SPRING, FOR NON-RETURN VALVE.
PLUG, RETAINING NON-RETURN VALVE
3
SPRING AND BALL.
4 BLEED HOLE.
5 PLATE. CARRYING
RETURN PUMPS.
6 PAPER WASHER FOR OIL RETURN PUMP.
7 BACK PLATE OF OIL RETURN PUMP.
DOWEL PIN. LOCATING PUMP PLATES
8
A N D BODY.
9 BODY OF OIL RETURN PUMP.
DOG END OF PUMP GEAR TO ENGAGE
10
IN END OF CAMSHAFT.
DRIVING GEAR. FOR OIL RETURN PUMP
11
DRIVEN GEAR, FOR OIL RETURN PUMP'
12
ENGINE OIL PUMPS
Each pump is independently driven, at half engine speed, from the ends of the two
camshafts. They each consist of a pair of close fitting gear wheels in a cast iron body.
The gears of the delivery pump are considerably narrower than those of the return pump,
giving the latter the necessary extra capacity to ensure efficient scavenging.
Two separate gear type oil pumps are used, one for
Illustration 4
OIL FEED AND
14
Oil feeds by gravity to the delivery
13 FRONT PLATE OF OIL RETURN PUMP.
14 SCREW [1 OF 6) USED TO RETAIN PLATES
AND BODIES OF OIL PUMPS TO THE
CARRYING PLATE.
15 BACK PLATE OF OIL FEED PUMP.
16 DOWEL PIN, LOCATING PUMP PLATES
AND BODY.
17
DRIVEN GEAR, FOR OIL FEED PUMP
18 FRONT PLATE OF OIL FEED PUMP.
19
SCREWDRIVER SLOT, TO ENABLE DRIVING
GEAR TO BE CORRECTLY POSITIONED
DURING ASSEMBLY.
20 DRIVING GEAR. FOR OIL FEED PUMP.
21 BODY OF OIL FEED PUMP.
22 BACK PLATE OF OIL FEED PUMP.,
23 PAPER WASHER FOR OIL FEED PUMP.
24 BLEED HOLE.