Schwing SP 750-18 - Install the New Rams

108
Maintenance
SP 500 / 750-15 / 750-18 / 1000 / 1250 Operation Manual
Figure 24
Remove ram from waterbox
12. Clean and inspect the bolts and bushings, the
spacer coupling, and the cylinder ange. Replace
any damaged or worn parts with new ones.
Install the new rams
1. Apply Loctite primer (or equivalent) to the M20
bolts. Allow the primer to dry.
2. While the primer is drying, apply a liberal coat of
clean grease to the new rams. It is impossible to
use too much grease in this procedure, because
the excess will be wiped o󰀨 by the material cylin-
ders during installation.
3. Hold the new ram up to the cylinder ange. Line
up the grooves, and drop your nut and bolt into
place to hold the assembly together. Again, you
should tighten the nut only nger-tight.
Figure 25
Install new ram
4. Restart the engine and clear the E-stops. Press
the concrete pump forward or reverse button and
Ram Change Mode button simultaneously. Slow-
ly extend the cylinder until the ram is installed in
the material cylinder, but the mounting ange is
still exposed enough to remove the nut and bolt
(Figure 26). When in position, release the con-
crete pump forward/reverse or Ram Change but-
ton to stop the di󰀨erential cylinders. Shut o󰀨 the
engine. Remove the nut and bolt.
Figure 26
Push ram into material cylinder
5. Restart the engine and clear the E-stops. Press
the concrete pump forward or reverse button and
Ram Change Mode button simultaneously. Slow-
ly retract the rod again (Figure 27), until there is
room to install the spacer coupling.
Figure 27
Retract cylinder away from ram