2018-10-10
407-313M
NP30L or NP40L
Troubleshooting
96
FOLD / FIELD Troubleshooting (2013+ 2-Point 5-Section Only)
Problem
Cause
Solution
Fold or Unfold Abnormal
with Switch Box Indicator
Illuminated
Circuit to solenoid valves broken, typically a
disconnected harness at hitch
Check harness connections at hitch, then,
check for 12 Vdc at solenoids.
Outer wings folding in
field lift
No power to outer wing fold solenoid, or switch in
FOLD or PARK
Check connections and continuity, or set
switch to FIELD.
Air in hydraulic system
Cycle system several times, and as
needed bleed hydraulics (page 106).
Outer wings not folding
before inner wings
Possible harness problem
Check connections.
Unfold: Inner wings do
not stop at wings-level
Switch not in FOLD
Check switch position and indicator lamps
No power to switch or harness
Check power to switch, harness
connections at hitch.
Defective switch, damaged harness
Check 12 Vdc at solenoids.
One inner wing unfold
does not stop at wings-
level
Proximity switch damaged or disconnected
Check 12 Vdc at solenoids.
Inner proximity switch Mis-adjusted
If 12 Vdc present, check/adjust switch,
see “
Field fold: wings do not
stop at gull-wing
Switch not in FIELD
Check switch position and indicator lamps
No power to switch or harness
Check power to switch, harness
connections at hitch.
Defective switch, damaged harness
Check 12 Vdc at solenoids.
Field fold: outer wing
does not reach gull-wing
Air in system
Cycle system several times, and as
needed bleed hydraulics (page 106).
Field fold: one wing does
not stop at gull-wing
Proximity switch damaged or disconnected
Check 12 Vdc at solenoids.
Inner proximity switch Mis-adjusted
If 12 Vdc present, check/adjust switch,
see “
Outer wing does not
unfold at all
Automatic wing latch stuck
Slightly re-fold to release latch. If latch
does not release, lubricate pivot.
Insufficient oil flow to system
Increase flow on fold/lift circuit.
Wings won’t fold at all.
Switch in FIELD
Set switch to FOLD.
Loose connection on weight transfer solenoid
Check harness connections and 12 Vdc
at solenoid.
Summary of Contents for Nutri-Pro NP30L
Page 2: ...Table of Contents Index Table of Contents Index ...
Page 154: ...NP30L or NP40L Cover Table of Contents 150 2018 10 10 Cover Table of Contents 407 313M ...
Page 155: ...Table of Contents Index Table of Contents Index ...
Page 156: ...Great Plains Mfg 1525 E North St P O Box 5060 Salina KS 67402 ...