Procedure
1. Unscrew cylinder screws.
2. Remove valve housing from cover.
3. Be careful with o-ring.
7.5.2 Strip and clean gas ballast valve
Required tools
● Allen key,
WAF 2
● Allen key,
WAF 3
● Circlip pliers,
J0
● Calibrated torque wrench (tightening factor ≤ 2.5)
Procedure
1. Rotate knob to “open” position.
2. Unscrew countersunk head screws.
3. Remove rotary knob.
4. Pull tappet far enough out of valve housing so that you can pull out cylinder bolt.
5. Using pincers, remove cam plate and circlip.
6. Be careful with washer and compression spring.
7. Remove tappet from valve housing.
– Be careful with o-ring.
8. Unscrew cylinder screw from valve housing underside.
9. Be careful with washer and compression spring.
– Dowel pin remains in valve housing.
10. Clean all parts and check parts for wear.
11. Replace wear parts according to maintenance kit.
7.5.3 Remove and clean silencer nozzle
The silencer nozzle is installed below the gas ballast valve. The nozzle has a type-specific opening. If
the nozzle is soiled, it must be cleaned or replaced.
Required tool
● Open-end wrench,
WAF 8
2
1
Fig. 20:
Remove silencer nozzle
1 Silencer nozzle
2
O-ring 6 × 2.2
Procedure
1. Unscrew silencer nozzle.
– Be careful with o-ring.
2. Clean silencer nozzle with compressed air.
3. Replace O-ring.
4. Screw silencer nozzle back in up to stop.
– Be careful with o-ring.
Maintenance
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