NovoPress HP 300, Repair Instructions

Page: 28 / 46

24
Pressing Cylinder HPM 400
6 ASSEMBLY
6.1 Fit the seals (51) and (46), the valve piston (21) and the parts (22) and (26) in to the cap screw
(23).
6.2 Insert the O-Ring (56) into the piston (17). Screw the cap screw together with the parts listed
under 6.1 into the piston and tighten with 50 Nm of torque.
6.3
The valve piston (21) must not seize.
(Move the piston (21) with a
screwdriver or similar implement.)
6.4 Grip the head (1) horizontally in a vice.
6.5 Fit the spring (41) and the piston (17) into the head.
6.6 Press the piston (17) down by hand until the groove on the piston is visible at the bottom, and
then tighten the screw (37).
WARNING! The end of the screw (37) must engage the piston groove.
6.7 Fit the piston (6) into the cylinder (2).
6.8 Using a screwdriver, place the cup springs (66) on to the piston (6).
6.9 Fit the thrust pin (80) into the cylinder (2).
6.10 Place the spring (27) on the valve sleeve.
6.11 Assemble the cylinder and head.
WARNING! Screw the piston fully home into the head.
The hole in the cylinder must be visible through the tapped hole for the
screw (43).
If the hole is not visible, the cylinder must be screwed back until the hole can
be seen.
After the screw (43) has been tightened, the head must rotate through 90°.
6.12 If the head will not rotate through 90°, remove the screw (43) and screw back the cylinder until
the next hole is visible (one half-turn).
6.13 Push the piston (5) complete with the fittings on to the piston (6). The holes in the piston must
line up with the holes for the pump lever in the piston.