FLK Gas Sampling System - MPIP - Free

SQ256 Retraction Device
4.3 Chain wheel
Schnitt = View
15
The chain wheel should be checked every 2-3 years and when adjusting the guide rollers, the chain wheel entry
into the double chain must be checked.
Legends: 1 Hardened chain wheel 11 Running rail
2 Key 12 Three-phase worm-drive motor
3 Distance piece II 13 Coupling for compressed air motor
4 Distance piece III 14 Threaded bolts
5 Motor drive shaft 15 Hexagonal nut
6 Keys 16 Hexagonal screw
7 Torque arm 17 Lock-nut
8 Disc 18 Mounting panel for motor
9 Roller ball-bearing 19 Bolt with retaining washer
10 Double chain
Fig. 7 Traversing carriage showing motor
Setting the chain wheel:
After unscrewing the front cover with the 4 Allen screws, the chain wheel can be checked for wear. When doing
this, the play between the chain wheel and the double chain should be checked and readjusted if necessary. If the
wear is too much, the chain wheel must be replaced.
• The nut (15) on the threaded bolt (14) must be loosened at both ends.
• Loosen the lock-nut (16).
• Then the play between the chain wheel (1) and the chain (10) is set with the screw (17).
Here, the bolt (19) on the bearing rocker arm (7) is used as fulcrum.
• Secure the screw (16) with the lock (17).
Copyright ® SIEMENS Page 104 04/04