Great Plains DVN8324 Operator Manual - Manual (Page 52)

48 8315-8324DVN Great Plains Manufacturing, Inc.
550-466M 11/25/2013
Air Brake Maintenance
Reservoir Draining
Prior to storage, or daily in humid operations, drain water
from the air brake reservoir tank
to prevent rust inside
the tank, and rust contamination of the brake valve sys-
tem.
1. Set the machine hand brakes.
2. Hold the petcock open until no water flows. Close
petcock.
Air Brake Filter Cleaning
Refer to Figure 44 and Figure 45
The air brake system includes filters
on both the sup-
ply and service lines, to trap any debris introduced dur-
ing connection and disconnection.
Clean filters seasonally; more often in dusty conditions.
1. Move the machine to a sheltered area, to prevent
unfiltered dust from entering the opened air system.
Do not remove the valve system to clean filters. Caps must be
on bottom of filter when removed.
2. Use a 33mm (1 9 ⁄
32
in) open-end or adjustable wrench
to loosen both red filter caps .
Note: There is generally insufficient clearance between
the filters for a socket or box-end wrench.
3. Carefully remove the cap from one filter. Be ready to
catch the filter screen
when it falls free.
Handle the filter screen element very gently. Great Plains
offers only complete replacement filters, and not screen ele-
ments.
Note: The inside diameter of the screen is the inlet side.
The screen is entirely welded stainless steel.
4. Using gentle compressed air, or a soft brush and
compatible cleaning fluid, remove debris from the
screen. Dry thoroughly.
5. The cap is a debris sump. Clean it with air, or water
and mild detergent. Clean and inspect the O-ring
.
Dry the cap if wetted.
6. Center the filter screen on the cap. Carefully re-
insert in filter body. Screw cap in, checking for mis-
alignment or binding of filter element. Tighten cap
gently with wrench.
7. Repeat step 3 through step 6 for the other filter.
Brake Drum and Liner Maintenance
Great Plains recommends having brakes serviced by trained and fully equipped brake technicians.
Figure 43
Air Brake Reservoir
41874
1
2
1
2
2
Figure 44
Brake Master Cylinder
41874
2
3
3
4
Figure 45
Air System Filter Screen
29592
3
4
5
3
2
5