Great Plains PFH-20 Operator Manual - Manual (Page 8)

6
Section 1 Assembly and Setup
PH-15, PH-20, PFH-15 and PFH-20 Coulter Command System 148-384M 6/21/2004
Great Plains Mfg., Inc.
5. Slide bearing and sensor mount plate subassembly
over sensor spindle (1), and bolt sensor mount plate to
drive wheel mount bracket with 1/2 x 1 1/2 inch bolts
(18), lock washers (19) and nuts (20).
6. Place circular disk (13) over threaded end of sensor
spindle (1) and install a 3/8 inch washer (21) and
flange nut (22). Do not tighten flange nut at this time.
7. With the circular disk in place, slide the sensor mount
plate subassembly in or out until the vertical flat bar
link (15) and the circular disk are aligned.
8. Tighten two set screws on the bearing (4) to hold the
subassembly in place.
9. Tighten the flangette bolts (7) being careful not to
damage the internal linkages.
10. Set sensor box cover and cover screws aside and
continue with speed sensor assembly.
Figure 1-2
Sensor Box
18427
Sensor Box
If the sensor box is not preassembled to the depth sensing
wheel, refer to Figure 1-2 and the following instructions.
1. Assemble sensor spindle (1) to left end of fertilizer
drive wheel rockshaft with three 1/4 x 3/4 inch bolts (2)
and lock washers (3).
2. Bolt the bearing (4) between two flangettes (5) and to
the back side of the sensor mount plate (6) with 5/16 x
3/4 inch carriage bolts (7), lock washers (8) and nuts
(9). Do not tighten nuts at this time.
NOTE: Position the heads of the bolts against the
flangettes with lock washers and nuts pointing outward.
Locking collar on bearing should point away from the sen-
sor mount plate and toward the coulter depth sensing
wheel.
3. Place rubber gasket (10) between sensor box (11)
and the sensor mount plate (6). Screw sensor box to
sensor mount plate with #10 x 7/16 inch pan head
screws (12) and star lock washers (13).
4. Remove cover from sensor box and inspect the inter-
nal linkages. The circular disk (14) should be linked to
the flat bar (15) with a formed round bar link (16).
Make sure the round bar link is in place and secured
with a spring clip extension spring (17) that is connect-
ed between the circular disk and the flat bar through
the small holes.