NP30A or NP40A
Applicator Operating Instructions
51
2019-03-11
407-502M
Raise/Lower Pull-Type
Five of the six lift cylinders are slaved to the left front
caster 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 45).
If raising for maintenance, swing out hydraulic depth stop
and engage all lift cylinder lock channels (page 45).
Lowering Pull-Type
If lock channels are engaged on any lift cylinders, raise
the applicator and disengage the channels (page 45).
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 front caster wheel. See “
Depth Stop Adjustment Pull-Type
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 45) when
working around a raised fertilizer applicator. The bypass
orifices in the re-phasing system cause it to slowly lower.
Re-Phasing Pull-Type Lift System
In typical use during a single application operation, it is
normal for the lift cylinders to get out of phase, resulting
in uneven raising and lowering of the fertilizer applicator.
Every 8 to 10 passes, re-phase the cylinders with this
procedure:
1. Raise the applicator completely, and hold the
hydraulic lever or switch in Extend for several
seconds after the applicator reaches full elevation.
2. When all cylinders are fully extended, momentarily
reverse (Retract) the control to lower the applicator
1
/
2
inch (12 mm).
3. Set circuit to Neutral to hold for level check.
If re-phasing does not bring the applicator into level,
other possibilities include:
• tire pressures too high or too low (page 140),
• worn tires,
• pull-type tongue height incorrect (page 38),
• 2-point tractor hitch height and level incorrect,
• 2-point gauge wheel height incorrect (page 86),
• 2-point lift-assist height spacers incorrect or not
installed (page 38), and;
• front caster wheel / lift-assist eyebolts (page 92)
• significant amounts of air in the hydraulic system,
indicating a need to perform a hydraulic bleed.
