Great-plains MF45 Operator Manual User Manual download pdf (Page 21)

4/15/2003

500-048M

Adjustments

Boom Height

After calibrating your sprayer for the speciﬁc nozzle you

will use at a desired pressure, and tractor speed, the main

ﬁeld adjustment is the boom height. Refer to Elevator Op-

tion in the Sprayer Owner’s Manual. Depending on which

type of nozzle you are using, you need to set your boom

height so that you achieve the correct overlap for that spe-

ciﬁc nozzle. If the crop canopy is taller in some ﬁelds than

others, you will need to adjust the boom height according-

ly. Refer to the nozzle charts located in the Sprayer Own-

er’s Manual or the Application Guide to determine the

height of the boom needed.

EXAMPLE: A 2.5 Metercone nozzle at 20 inch spacing is

being used. From the nozzle chart (refer to the Sprayer

Owner’s Manual or the Application Guide), a height of 19

to 21 inches above the top of the crop is required. If the

crop is 6 inches off the ground, the boom height should be

set to 25 to 27 inches off the ground.

After setting your boom height on the booms mounted on

the Tandem Axle Sprayers, there may be a need to adjust

the fold latch when the boom is ready to be folded. Refer to

Figure 11, page 17. If a hose ﬁtting or nozzle is positioned

where the fold latch is located, the fold latch needs to be

offset with the fold latch extension provided. The fold latch

extension can be mounted in the forward or rear direction;

in any direction the fold latch needs to be repositioned. Af-

ter repositioning the fold latch, be sure to torque bolts to

the speciﬁcations listed in the Torque Values Chart for

Common Bolt Sizes in Appendix. If boom height is in the

lower ranges, you may want to raise the boom for trans-

port. Refer to Elevator in the Sprayer Owner’s Manual.

Nozzle Pressure

Another area that will need some ﬁeld adjustments is the

nozzle pressure. As your tank level decreases, you may

have to adjust the boom pressure to keep the pressure at

the same magnitude for what the sprayer was calibrated

for. Watch your pressure gauge and be aware of changes

in the pressure.

Break-Away Pivot

The boom break-away pivot spring should be adjusted so

that the compressed length is 5 3/8 of an inch. If the spring

is not compressed to 5 3/8", the boom will tend to break

away over bumps and wear out the break-away mecha-

nism. Refer to step 7 under Sprayer/Boom Assembly In-

structions on page 10, along with Figure 1 on page 11.

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Great-plains MF45 Operator Manual User Manual Page 21

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