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6 B 72 en

5

7

Maintenance

The manual override requires no regular maintenance.
Grease can be added to the gear through the hole of the
outermost fitting screw, if needed.

Other maintenance as described for the B1C actuator, see
the IMO 6BC71en and the section 4.

8

Valve close and open position 
adjustment

In the B1C_RK actuator, the close position limit of valve is
adjusted with the handwheel (309), secured with screw
(319) and  locked with the hex nut (320).

B1C_RK_: Counterclockwise rotation of the handwheel
opens the valve.

In the B1C_RL actuator, the open position limit of valve is
adjusted with the handwheel (321), secured with screw
(323) and  locked with the hex nut (324). 

B1C_RL: Clockwise rotation of the handwheel closes the
valve.

In the B1C_RR actuator, see function from the texts above. 

CAUTION:
Air pressure must always be released before operating
or servicing manual hand wheel operator!

 Fig. 4

B1C_RK

Parts list for Fig. 5:

Part Quantity 

Name

306 1 

Manual 

overdrive

307 1 

Cylinder 

end

308 1 

Extension 

shaft

309 1 

Handwheel

310 1 

Support 

bracket

311 1 

Hex 

screw

312 1 

Bearing

313 1

Pin

314 1

Pin

319 1

Hex 

screw

320 1

Hex 

nut

 Fig. 5

B1C_RL

NOTE:

Turn the handwheel back to the starting position, before
applying supply pressure to  the actuator again.

Parts list for Fig. 6:

Part Quantity 

Name

1 1 

Housing

305 1 

Manual 

overdrive

310 1 

Support 

bracket

316 

Fitting plate (size 20 only)

317 

Socket screw (size 20 only)

321 1 

Handwheel

322 1 

Pin

323 1 

Hex 

screw

324 1 

Hex 

nut

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