Schwing SP 500 - Page 107

107
Maintenance
SP 500 / 750-15 / 750-18 / 1000 / 1250 Operation Manual
Figure 20
Remove spacer coupling
8. Restart the engine and clear the E-stops. Press
the concrete pump forward or reverse button and
Ram Change Mode button simultaneously to
slowly extend the cylinder rod until it just contacts
the rubber ram ange (Figure 21). Release the
concrete pump forward/reverse or Ram Change
button to stop the di󰀨erential cylinders. Shut o󰀨
the engine.
Be careful not to drive the rubber ram into the
material cylinder. If you accidentally knock the
ram into the material cylinder so far that you can’t
reach it, you will have to remove it by knocking
it out from the Rock Valve end of the unit. Call
Schwing America’s Service Center.
Figure 21
Extend cylinder to ram
9. There is a groove in the ram ange that will line
up with a groove in the cylinder ange. The M12 x
45 bolt with nut will drop into this groove and allow
you to pull the ram out. The t should be snug,
but there is no need to tighten the nut with tools
(Figure 22). The ram ange and cylinder ange
are shown outside of the waterbox for clarity of
the illustration.
Figure 22
Bolt ram to dierential cylinder rod
10. Restart the engine and clear the E-stops. Press
the concrete pump forward or reverse button and
Ram Change Mode button simultaneously to
slowly retract the cylinder rod until the ram is clear
of the material cylinder (Figure 23). Release the
concrete pump forward/reverse or Ram Change
button to stop the di󰀨erential cylinders. Shut o󰀨
the engine.
Figure 23
Retract ram into waterbox
11. Remove the nut and bolt, and the ram will be free
to come out of the waterbox (Figure 24).