Graco REGULUS 003.175-DP User Information page 22

REPLACING THE VALVES
Screw out the cheese head screws
Remove pressure spring
Prise the ball
Feed the pin (special tool) with the thinner shaft through the free valve seat and carefully
knock out the valve parts opposite with light taps.
Hold one hand against the parts to be removed to prevent them falling out.
After removing the spring
, feed the pin with the thicker neck through the valve housing and press out the valve
seat with the bush sleeve
After replacement of wearing parts re-assembly takes place in reverse order.
If the PE sealing rings show signs of damage, these must also be renewed. If new sealing
rings are used they must be placed in the appropriate seat before replacing the valve seat
and the bush sleeve
Take care that the bent ends of pressure springs
feet and
and ball bearing traveller
out of the valve seat with the help of a small screwdriver.
, the ball bearing traveller
.
.
.
Bent end
and remove the connection pieces
from the valve area.
, the ball
and
20
.
and the valve seat
are mated to the ball guide
B.6.50.80-B-GB
Fig. 17