D-Series Syringe Pumps - Isco

D Series Syringe Pumps
Section 5 Pump Maintenance & Repair
5.8 Shear Key
Replacement
Table 5-1 below provides part numbers for each pump model
replacement shear key.
Table 5-1 Replacement Shear Keys
Pump Model
Part Number
1000D, 500HP, 260D, 65D 60-1243-607
500D 60-1243-654
100DM/DX 60-1243-608
65DM 60-1243-949
1. Place the pump on its side and remove the four panhead
screws, that attach the access plate to the case bottom, as
shown in Figure 5-3.
2. Remove the cotter pin that passes through the castle nut
and ball screw.
3. Use a 3 4" wrench to remove the castle nut, shown below.
4. Remove the spacer.
5. The two broken halves of the shear key should be protruding
from the brass worm gear and the ball screw.
Note
The 65DM pump has a bearing set not included in the other
pumps. In addition to following the other steps in this section,
when performing shear key replacement on a 65DM pump,
ensure that the bearing set is properly reinstalled, as
described in Section 5.8.3.
Access Plate
Spacer
Ball Screw
Cotter Pin
Castle Nut
Figure 5-3 Accessing the shear key
5-10