Section III. REPAIR
PARTS, SPECIAL TOOLS AND EQUIPMENT
sprayer.
4-8. Tools and Equipment
Tools, equipment, and spare parts issued with or
4-10.
Maintenance Repair Parts
authorized for the aircraft mounted insecticide sprayer
are listed in the basic issue items list, appendix C.
Repair parts and equipment covering Organizational
maintenance for the insecticide sprayer are listed and
illustrated in TM 5-3740-211-24P.
4-9. Special Tools and Equipment
No special tools or equipment are required for
Organizational maintenance of the insecticide
Section IV. PREVENTIVE
MAINTENANCE CHECKS AND SERVICES
minimum inspection requirements.
4-11.
General
4-12.
Organizational Maintenance Preventive
Insure that the aircraft-mounted insecticide sprayer is
ready for operation at all times. To do so you must
Maintenance Checks and Services
perform a systematic inspection so that defects may be
discovered and corrected before they result in serious
damage or failure. Perform the necessary preventive
preventive maintenance checks and service functions.
maintenance checks and services described in 4-12.
The item numbers indicate the sequence of
Table 4-2. Organizational Preventive Maintenance Checks and Services
Interval
B - Before operation
A-
After operation
M - Monthly
Item
Daily
D - During operation
W-W
eekly
No.
B
D
A
W
M
Item to be inspected
Procedure
01
X
X
Tee boom strainer
Remove strainer; clean or replace, if required.
02
X
X
Hoses, couplings, tank
Clean parts; replace as necessary.
strainer, nozzles.
03
X
Pump brake cables and
Lubricate.
controls.
04
X
Liquid loading system
Clean; replace if required.
strainer.
05
X
X
Windmill blades.
Check blade angle and condition; service and
replace as necessary.
Section V.
TROUBLESHOOTING
4-13.
Troubleshooting Chart
insecticide sprayer. The chart serves only as a guide,
and does not mean that other troubles may not exist
assigned to Organizational maintenance level for the
Table 4-3. Organizational Troubleshooting Chart.
Malfunction
Probable cause
Corrective action
a.
a.
1. Booms
noticeably vibrate or misalign
Tank installation loose.
Secure all tank
tiedown devices.
b. Cable tension out of adjustment.
b. Adjust cable tension as required.
in flight.
2. Leak develops in sprayer system.
Faulty fluid system components.
Repair or replace faulty components.
3. Use of pump causes.
Fan blade damaged.
Replace fan blade.
a. Loose connection on control valve.
a. Adjust and secure connectors.
4. No response to start spray command.
b. Replace any faulty couplings.
b. Inlet or outlet couplings split.
5.
No response to stop spray command. Loose connection on control valve.
Adjust and secure connectors.
6.
Spray intermittent.
Brake cable or cable connector loose.
Adjust and secure cable.
a. Contamination in spray nozzles.
a. Disassemble and clean nozzles.
7.
Spray uneven.
b. Boom tee screen clogged.
b. Clean or replace screen.
8.
Unable to adjust windmill blade pitch Internal mechanism damaged.
Replace hub assembly.
angle.
a. Gage damaged or out of calibration.
a.
9.
Incorrect pressure gage indication.
Replace gage.
b. Pressure line loose or broken.
b.
Repair or replace pressure line.
4-15
