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To raise the top (head) bolster:
1.
Insert a spacer block with parallel surfaces between the moving bolster and top bolster, pump the hydraulic unit
to build force to the maximum capacity of the press.
2.
With the press at maximum applied force, loosen the column nuts located directly below the top bolster. On
Four Post presses, a brass tipped set screw must be loosened on each nut before nuts are loosened.
3.
Release hydraulic force and remove the spacer, allowing the top bolster to rest on the lower column nuts.
4.
Move the upper column nuts to the position required to create the desired daylight.
5.
Raise the top bolster against the top nuts and tighten the lower nuts finger tight against the bottom of the top
bolster.
6.
Measure and equalize the distance from the bottom surface of the top bolster to the top surface of the base
bolster at two points (four points on Four Post presses) as far apart as possible. Adjust the lower nuts as
needed to insure parallelism between the top bolster and base bolster. Turn the upper column nuts finger tight
against the top bolster.
7.
Insert a spacer block with parallel surfaces between the moving bolster and the top bolster (spacer must be tall
enough to build force on spacer), pump the hydraulic unit to build force to the maximum capacity of the press.
8.
Tighten the lower nuts against the bottom surface of the top bolster as tight as possible.
9.
This is a good time to check the nuts on top of the base bolster and if necessary, retighten.
10. Tighten brass tipped setscrews in nuts (if your press is a Four Post). Open press and remove spacer, the press
is now ready to operate.
To lower the top (head) bolster:
1.
Insert a spacer block with parallel surfaces between the moving bolster and top bolster, pump the hydraulic unit
to build force to the maximum capacity of the press.
2.
With the press at maximum applied force, loosen the column nuts located directly below the top bolster. Move
these column nuts to the position required to create the desired daylight. On Four Post presses, a brass tipped
setscrew must be loosened on each nut before nuts are loosened.
3.
Release hydraulic force and remove the spacer allowing the top bolster to rest on the lower column nuts.
4.
Tighten the upper column nuts finger tight against the top surface of the top bolster.
5.
Follow steps 6 thru 10 as described above.
IMPORTANT: Four Post models utilize a set screw in the column nuts. These must be loosened prior to adjusting
daylight, and retightened after adjusting daylight.
WARNING:
After adjusting the daylight, be sure the top bolster is parallel to the top surface of the base bolster
before applying pressure.
4-4
Carver Inc
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