Great Plains NTA2007 Operator Manual - Manual (Page 129)

Great Plains Manufacturing, Inc. Table of Contents Index Maintenance and Lubrication 125
2012-01-05 Table of Contents Index 166-372M
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
system.
1. Chock the cart tires (page 31).
2. Hold the petcock open until no water flows.
Close petcock.
Air Brake Filter Cleaning
Refer to Figure 111 and Figure 112
The air brake system includes filters
on both the
supply and service lines, to trap any debris introduced
during connection and disconnection.
Clean filters seasonally; more often in dusty conditions.
1. Move the drill to a sheltered area, to prevent
un-filtered dust from entering the opened air system.
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.
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. Centre 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.
System Contamination Risk
Do not remove the valve system to clean filters. Caps must
be on bottom of filter when removed.
Equipment Damage Risk:
Handle the filter screen element very gently. Great Plains
offers only complete replacement filters, and not screen
elements.
1
2
Figure 110
Air Brake Reservoir
31227
1
2
4
4
5
Figure 111
Air Brake Filters
31377
5
6
Figure 112
Air System Filter Screen
29592
5
6
7
5
4
7