SyriXus Series Pumps Installation and Operation Guide
Section 9 Pump Maintenance, Troubleshooting, and Servicing
9-18
EAR99 Technology Subject to Restrictions Contained on the Cover Page
WARNING
The shear key is NOT a safety feature! It provides a measure of
protection against damage to the equipment. Avoid
overpressure situations by properly installing and programming
the pumping system. In applications where overpressure
conditions are possible, install an appropriate pressure relief
safety device in your apparatus.
9.13.1 Shear Key
Table 9-1 "Replacement Shear Keys" below provides part numbers for
each pump model replacement shear key.
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 Fig-
ure 9-10.
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.
Figure 9-10 Accessing the shear key
Table 9-1 Replacement Shear Keys
Pump Model
Part Number
1000x, 500x, 260x
60-1243-607
65x
69-1263-365
Access Plate
Cotter Pin
Castle Nut
Spacer
Ball Screw
