Chapter 8: Maintenance
183.
3.
Follow the procedure to remove the drive wheel. See: Replace the Drive Wheels on page
169. This provides easier access to the underside brush.
4.
Use an 0.25 inch (7 mm) flat-blade offset screwdriver to remove the brush cover (A).
5.
Insert a new replacement brush as shown by (B) in Figure 8-17.
6.
Replace the brush cover. Do not over-tighten.
7.
Repeat Step 3 through Step 6 for the underside brush (C).
8. Replace the drive wheel. See: Replace the Drive Wheels on page 169.
9.
Replace the side and rear skins. See: Removing and Installing Skins on page 178.
10.
Release the E-Stop and enable the drive motors. See: Releasing an E-Stop on page 31.
Replace the Drive Wheels
The LD-250 has solid aluminum wheels with polyurethane treads. Depending on the AMR
application, the wheel treads have a duration of 10,000 km (6200 miles) before replacement is
necessary. See: Distance Traveled by the AMR on page 162.
Inspect the wheels daily and remove any surface-embedded foreign material such as stones,
screws, or metal swarf.
Thoroughly inspect and clean wheels and treads every 3 months and replace any wheels that
show signs of excessive wear or damage.
Tread damage might be indicated by:
l
Abnormal or uneven wear patterns. Damage to the metal wheel or bearing can also
cause abnormal wear.
l
Cracks, chips, or cuts in the polyurethane tread.
l
Flat spots.
l
Abraded rough surface.
l
Delamination or debonding (separation) of the polyurethane tread.
Metal wheel damage might be indicated by:
l
Binding or indications of metal-on-metal wear such as metal filings or a black powdery
deposit.
l
Oil or grease leaking from bearings.
l
Cracks in the metal part of the wheel.
Replacing Drive Wheels
Replace both wheels at the same time. Differences in wear between drive wheels might affect
the repeatability and accuracy of navigation.
20472-000 Rev B LD-250 Platform User's Guide 169
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