4
5
7
6
8
9
10
11
13
14
12
ballig/
convex
1
2
3
Fig. 15:
Gas ballast valve
1 O-ring
8
Compression spring
2 Screw cap
9
Washer
3 Valve flap
10
Circlip
4 Valve housing
11
Cam plate
5 O-ring
12
Countersink screw (2×)
6 Tappet
13
Head
7 Cylinder bolt
14
Countersink screw
Required tools
● Allen key,
WAF 2
● Circlip pliers,
J0
● Calibrated torque wrench (tightening factor ≤ 2.5)
Dismantle gas ballast valve
1. Unscrew the countersink screws (2x).
2. Pull the valve housing out of the vacuum pump stand.
– Be careful with the O-ring.
3. Unscrew the countersink screw the from the head.
4. Remove the head.
5. Unscrew the screw cap from the valve housing.
6. Watch out for the valve flap in the valve housing.
7. Pull the tappet far enough out of the valve housing so that you can pull out the cylinder bolt.
8. Using circlip pliers, remove the cam plate and the circlip.
9. Take care of the washer and the compression spring.
10. Remove tappet from valve housing.
– Be careful with the O-ring.
11. Clean all parts and check the parts for wear.
12. Replace wear parts according to the maintenance set.
Assemble gas ballast valve
1. Determine the curve of the valve flap and place the valve flap in the screw cap with the curved
side facing downwards.
2. Screw the screw cap and the valve housing hand tight.
3. Insert the O-ring in the groove in the tappet.
4. Insert the tappet in the valve housing.
5. Install the compression spring and the washer.
6. Install the circlip in the recess in the valve housing.
7. Slide cam plate onto tappet.
– Take care with the longitudinal groove in the flange housing.
8. Pull out the tappet against the force of the spring and place the cylinder bolt in the bore.
9. Rotate the cam plate to move the tappet to the "1" position (open).
10. Install knob to tappet.
11. Tighten the countersunk head screw.
– Tightening torque:
1.0 Nm
.
Maintenance
39/60
