Great Plains NP30A 30-foot Operator Manual - Manual (Page 53)

Great Plains Manufacturing, Inc. Table of Contents Index Applicator Operating Instructions 49
2014-05-20 Table of Contents Index 407-502M
Raise/Lower: Pull-Type
Refer to Figure 33
Five
of the six lift cylinders are slaved to the left gauge
wheel cylinder , which has a hydraulic down stop.
Equipment Damage Risk:
Do not fold while in ground. Fold only when fully raised. When
lowered, the wing coulters and knives or tines near the wing
pivot may be damaged by ground dragging.
Raising Pull-Type
Anhydrous Ammonia Exposure Hazard:
When raising in field, be facing into the wind or be turning
up-wind. Even if NH
3
flow was stopped some distance before
the lift point, the knives or tines will still be emitting NH
3
vapor when out of the ground.
To raise the applicator, extend the cylinders (normally
with an Extend operation of the tractor remote).
The applicator raises fully at end of stroke, regardless of
depth setting. Holding the circuit at raised for a few
seconds re-phases the cylinders.
If raising for highway transport, parking or storage,
engage center section lift cylinder lock channels
(page 44).
If raising for maintenance, swing out hydraulic depth stop
and engage all lift cylinder lock channels (page 44).
Lowering Pull-Type
If lock channels are engaged on any lift cylinders, raise
the applicator and disengage the channels (page 44).
Re-engage the depth stop as needed.
To lower the applicator, retract the lift cylinders (normally
with a Retract operation of the tractor remote).
The applicator lowers to the depth set at the hydraulic
depth stop at the left gauge wheel. See “Hydraulic
Depth Stop Adjustment” on page 85 for details on
height adjustment.
Gradual Crushing Hazard:
Do not rely on hydraulic pressure alone to keep the fertilizer
applicator raised. Use transport/lift locks (page 44) when
working around a raised fertilizer applicator. The bypass
orifices in the re-phasing system cause it to slowly lower.
Figure 33
Pull-Type Lift System
31523
2
1
1
1
2