Buhnen HB 720 R/S, Translation Of The Original Operating Manual

Page: 31 / 52

Servicing/Maintenance
31
6.6 Replacing the valve assembly
Tools needed • 1 Allen wrench 2,5 mm
• 1 Allen wrench 4 mm
• 1 auxiliary screw M4
E1
E2
E3
E4
E5
E11
E10
E9
E8
E7 E6
Fig. 6.6/1: Replacing the valve assembly
1. Let the device heat up thorougly. Continue activating the trigger until the tank is com-
pletely empty.
2. With the cover closed undo the xing screw (E1) of the lever (E2) with the Allen
wrench 4 mm. Remove the lever and carrier (E3).
3. Undo the screws (E4) with the Allen wrench 2.5 mm. Remove the cover casing (E5).
4. Screw the auxiliary screw M4 in to the clamping piece (E7). Release the clamping
screw (E6) with washer with a 2.5 mm Allen key. Carefully remove the clamping piece
with auxiliary screw M4 from the valve housing. Also remove the spring (E8) and the
cone (E9).
5. Decrease the pressure to 1....2 bar. Briefly actuate the trigger. The burst of pressure
ejects the valve (E10) and spring (E11) from the valve housing. Hold a cloth in front of
the opening to catch these (hot!) parts.
6. Fit the new components, cover casing and lever in reverse order.
GB
H2200XM_DE-EN_200720.indd 31 26.07.21 08:55