CHAPTER 3 MAINTENANCE PROCEDURES
Ohaus Corporation www.ohaus.com
3-4
Ranger
™
(Count) 3000 Series Service Manual
3.5 Removing/Replacing the Load Cell
A Load Cell that is even slightly bent or corroded should be replaced. The Load Cell may also
need to be replaced because of instability, or because the scale does not calibrate or repeat.
Note:
The Load Cell is sold separately. (See Chapter 5.)
1. Unplug the cable leads connecting the Load Cell to the PCB. (See Figure 3-2.)
2. Turn the scale over and remove the bolts and washers that hold the Load Cell
assembly (frame and load cell) to the Bottom Housing.
Remove the bolts and their washer
pairs that hold the Load Cell
Frame to the Load Cell. Use a
high-leverage Allen wrench.
3. Lift the Load Cell away from
the frame.
Figure 3-4. Remove the bolts holding Frame to the
Load Cell.
4. When installing the replacement Load Cell, first secure the bottom frame to the load
cell with the screws and then secure the top frame to the load cell. Adjust the
down/up stop gaps (see table 3-2). Install the load cell assembly to the bottom
housing. Insert the bolts and their washers, and tighten the bolts. (See Table 3-1 for
torque settings.)
5. Connect the Load Cell cables to the PCB. (See Figure 3-2.)
