Great-plains YP825AR Material Rate User Manual download pdf (Page 73)

Great Plains Manufacturing, Inc. Table of Contents Metric Charts Liquid Fertilizer Rate 69

2013-11-11 Table of Contents Metric Charts 401-923B

Strainer

Refer to Figure 32

A Banjo brand strainer is supplied with the ground drive

fertilizer pump. It is plumbed before the Hypro pump. The

standard 80 mesh screen should be suitable for most

applications. Other sizes are available from Banjo.

If changing screen sizes, keep in mind the following.

• A smaller mesh (100) will keep very small manifold

oriﬁce plates from plugging so often. However, the

screen will have to be cleaned more often.

• A larger mesh (50) or (30) will pass more material but

should only be considered when using large manifold

oriﬁce plates.

• A plugged or partially plugged screen will starve the

pump resulting in a reduced application rate.

• Mesh sizes: (Smallest) 100, 80, 50, 30 (Largest)

Setting Relief Valve

A relief valve and pressure gauge is mounted:

• at front left on model YP425A, or

• at front center on model YP625A or YP825A

The relief valve protects the manifold, lines and ﬁttings

from excessive pressure. Any product that passes the

relief valve will discharge from the dump line in

relative safety.

To set relief valve:

1. Unlock plastic jam nut from relief valve knob.

2. Unscrew knob clockwise (looking down) until it

loses contact with internal spring.

3. Screw knob counterclockwise two turns.

Start at this setting.

4. Observe manifold gauge and watch for relief valve

dump line discharge while operating in the ﬁeld.

5. If valve is dumping product and gauge reads under

65 psi, stop tractor and, looking down, turn knob

clockwise

⁄

turn. Continue operating at normal ﬁeld

speed. Repeat this step as needed until no product

is discharged from relief valve dump line .

6. If the pressure gauge reads above 65 psi, change to

a larger oriﬁce. Go to step 2 and repeat.

Agricultural Chemical Hazard:

Wear protective gloves when changing strainer screens.

Consult material manufacturer or supplier documents for

proper handling and steps to take if skin contact occurs.

Figure 32

Strainer

18418

2 3

Figure 33

Fertilizer Relief Valve

31017

1 2 ... 68 69 70 71 72 73 74 75 76 77 78 ... 123 124

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