BENDIX D-2 GOVERNOR Manual
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1
®
SD-01-503
DESCRIPTION
The D-2
™
governor, operating in conjunction with the unloading
mechanism, automatically controls the air pressure in the
air brake or air supply system between a maximum (cut-
out) pressure and a minimum (cut-in) pressure. The
compressor runs continually while the engine runs, but the
actual compression of air is controlled by the governor
actuating the compressor unloading mechanism which stops
or starts the compression of air when the maximum or
minimum reservoir pressures are reached.
D-2
™
governors are provided with mounting holes which allow
direct mounting to the compressor or remote mounting.
Porting consists of three reservoir ports (1/8 inch P.T.),
three unloader ports (1/8 inch P.T.) and one exhaust port
(1/8 inch P.T.).
Bendix
®
D-2
™
Governor
EXHAUST
PORT
RESERVOIR
PORTS (3)
14
RETAINING
RING
11
PISTON
4
ADJUSTING
SCREW
2
BODY
6
EXHAUST
STEM
FIGURE 1 - D-2
™
GOVERNOR
5
15
11
5
11
20
O-RING
CLEAR/BLACK
NONMETALLIC
WITH O-RING
BLACK
RUBBER
BLUE
NONMETALLIC
FIGURE 2 - TYPES OF COVERS
FIGURE 3 - TYPES OF PISTONS
16
UPPER SPRING
SEAT
1
RETAINING
RING
15
RETAINING
RING
10
INLET/
EXHAUST
VALVE
12
O-RING
13
WASHER
MOUNTING
HOLES
(2)
15
RETAINING
RING
7
FILTERS
9
INLET/EXHAUST
VALVE SPRING
5
EXHAUST
STEM
8
O-RING
12 O-RING
8 O-RING
19 LOWER
SPRING SEAT
19 LOWER
SPRING SEAT
10
INLET/EXHAUST
VALVE
11
PISTON
18
SPRING GUIDE
17
PRESSURE SETTING
SPRING
3
LOCKNUT
UNLOADER
PORTS (3)
COVER
9
INLET/EXHAUST
COVER VALVE
SPRING
NONMETALLIC METALLIC