Kubota M6800S Workshop Manual page 565

M6800 · M6800S · M8200 · M9000, WSM
When the pressure inside piston becomes negative
as the piston is lowered, the low pressure gas flows
through the suction hole of the valve plate (7) to force
down the suction valve (3), thereby sending refrigerant
into each cylinder. The deflecting width of the suction
valve (3) is determined by the notch in the cylinder
(suction valve stopper) (5). When the piston goes into
the compression stroke and the pressure exceeds that of
high pressure side, the discharge valve (4) is pushed up
to send out the high pressure gas from the compressor.
After the compression stroke is completed and the
piston goes into the suction stroke, the high pressure gas
on the discharge side holds the discharge valve to
prevent the back flow of the gas from the high pressure
side. In this way, the difference of high and low pressure
can be maintained inside of the compressor.
The R type compressor has 5 pairs (10 cylinders) of
pistons secured to the swash plate which is secured
diagonally on the shaft. As the shaft rotates, the piston
(6) reciprocates in the same direction as the shaft.
Cylinders are arranged respectively on both sides of a
pair of pistons and when the cylinder on one side is in
compression stroke, the cylinder on the other side goes
into suction stroke.
(1) Suction
(2) Discharge
(3) Suction Valve
(4) Discharge Valve
10-M39
CABIN
(5) Notch
(6) Piston
(7) Valve Plate
(8) Retainer
W1052996
KiSC issued 03, 2008 A