HURSPK0026/00186
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59.Repeat step (49) for the other lock segments. Record all measurements - they will be used in determining the thickness of the required shims. (Even if most of the measurements are within the specified range, each lock segment will still have to be shimmed. This is because any changes to the shimming of the lock ring above any one segment will affect the “B” clearances of the other segments.)
60.
61.Loosen all nine (9) bolts that secure the lock ring to the main bell (twelve (12) bolts for the 60 Kg press), but do not remove. Loosen enough so that there is approximately 2 " (13 mm) of gap between the ring and the main bell (See Figure 14).
62.Remove the three (3) bolts from the lock ring, which are common to the shim set closest to the discharge end. Remove the shim set that was previously installed and retain for future use (See Figure 14).
63. | Measure the thickness of the shim set that was just removed. Refer back to the |
| measurements taken in steps 49 and 50. |
64.Calculate the required shim set thickness by determining (using the original clearance measurements) how much must be added (or subtracted) from the original shim set thickness to bring the “B” clearance into the specified range. (If shims were added between the main bell air cylinder and the upper cross member, then you will need to remove some thickness on the downlock ring shims.)
EXAMPLE
After replacing a main bell air cylinder, 0.015" (0.38 mm) of extra shimming had to be added between the cylinder and the machine upper cross member. The readings taken on the down lock closest to the discharge end of the press are 0.002" (0.05 mm), 0.007" (0.18 mm), and 0.005" (0.13 mm). In order to bring the “B” measurement back into the proper range, it is necessary in this case to subtract between 0.003" (0.08 mm) and 0.023" (0.58 mm) of shim.
Thus, we can safely subtract 0.015" from the shim thickness, and this should result in new “B” clearances of 0.018" (0.46 mm), 0.022" (0.56 mm), and 0.012" (0.30 mm).
65.Install the new shim segment between the lock ring and the dome and reinstall the three bolts previously removed but don’t tighten them. All bolts will be tightened when all shim segments are installed (See Figure 14).
66.Repeat the previous operations for the remaining shim segments. When calculating shim thickness for the other lock segments, it is important to make sure that the calculated
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