Buhnen HB 700, Operating Manual

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1
6.6 Replacing the valve assembly
Tools needed • 1 hexagon socket spanner size 1
• 1 hexagon socket spanner size 2.5
• 1 hexagon socket spanner size 3
• 1 auxiliary screw M4
E1
E2
E3
E4
E5
E6
E7
E8
E9
E10
E11
Fig ./1: Replacing the valve assembly
1 With the cover closed undo the fixing screw (E1) of the lever (E2) with the hexagon
socket spanner size 3. Remove the lever and carrier (E3).
2. Undo the screws (E4) with the hexagon socket spanner size 2.5. Remove the cover
casing (E5).
3. Screw the auxiliary screw M4 into the clamping collar (E6). Loosen the clamping screw
(E11) with the hexagon socket spanner SW 1. Carefully withdraw the clamping collar
and auxiliary screw M4 from the valve chamber. Likewise remove the spring (E7) and
cone (E8).
4. Reduce the pressure to 14.5…29 psi / 1....2 bar. Briefly actuate the trigger. The burst
of pressure ejects the valve (E9) and spring (E10) from the valve chamber. When you
actuate the trigger hold one hand over the orifice to catch these parts.
5. Fit the new components, cover casing and lever in reverse order.
Servicing/maintenance