System should be thoroughly cleaned and then prepared by flushing with a non-corrosive mineral oil or kerosene prior to
long periods of storage (five days or longer).
5.4
Troubleshooting
5.4.1
General
This section provides sufficient information to locate and correct malfunctions in the UH-1B/D Helicopter Spray
System. Remedies requiring higher echelons of maintenance are covered in Section 5.5, Field Maintenance and Repair.
5.4.2
No Response To Start Spray Command
PROBABLE CAUSE
POSSIBLE REMEDY
Loose connector or connection on the
control valve
Tighten
Inlet or outlet pump couplings split.
Replace
5.4.3
No Response To Stop Spray Command*
PROBABLE CAUSE
POSSIBLE REMEDY
Loose connector or connection on
control valve.
Tighten
5.4.4
Spray Intermittent
PROBABLE CAUSE
POSSIBLE REMEDY
Brake cable or cable connector loose
Tighten
Faulty windmill drive on pump
Replace entire unit
* Stop pump immediately by using brake.
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