Curtis Dyna-Fog TWISTER XL 3 4 Series Owner's manual

1
TWISTER
TM
XL 3
MODEL 3950 SERIES 4 MOTORIZED KNAPSACK ULV SPRAYER
17335 U.S. High ay 31 North
Westfield, Indiana, U.S.A.
.dynafog.com
Instruction Manual For Installation, Operation and Maintenance
Manufactured by Curtis Dyna-Fog
®
, Ltd.

2
TABLE OF CONTENTS
Forward. 3
Machine Specifications.. 4
Main omponents Diagram.. 5
Working Principles.. 6
Machine Operation. 7
Pre-Spray hecklist  8
Engine Operation Instructions.. 9-10
Operator Safety 11
On/Off ontrol Valve.. 12
Measuring Liquid Flowability. 13
Flow Rate hart.. 14
Honda Engine Maintenance.. 15
Speed Adjustment.. 15
Air Filter 15
Oil Level heck 16
Oil hange 17
Spark Plug 18-19
Engine Fins... 19
Fuel Filter and Fuel Tank 20
Spark Arrester.. 21
Tanaka Engine Maintenance.. 22
Speed Adjustment.. 22
Air Filter 22
Fuel Filter. 23
Spark Plug 23
Muffler 23
Engine Fins... 23
Blower Assembly.. 24
Inspection of the Blower.. 24-25
Air Filter Assembly 26
Removal and leaning 26
Poly-V Belt and Sheave Drive 27-28
Belt Alignment.. 27-28
Belt Tension.. 29
Flushing the System 30
Preventive Maintenance Schedule 31-32
Flow Rate Verification.. 33
Trouble Shooting Guide.. 34-35
Exploded Machine Diagram and Parts List.. 36-37
Straps. 38
Engine Blower Plate Assembly.. 39-40
Blower Assembly – Exploded. 41
Engine Assembly.. 42
Remote Nozzle Assembly 43
Hose Assembly. 44
Nozzle/Adaptor Assembly 45
Formulation Tank Assembly 46
ontrol Assembly, Throttle.. 47
Flow Regulating Orifices.. 48
Labels.. 49
Dual Nozzle Attachment Diagram and Parts List. 50-51
Installation instructions for Dual Nozzle. 52
Tanaka Engine Information 53-60

3
To the Ne O ner
Dear Valued ustomer,
ongratulations on selecting Dyna-Fog
® and one of the finest Ultra-Low-Volume (ULV),
machines in the world. The TWISTER™XL 3 is the newest in the Dyna-Fog
® family of
professional spraying equipment, and represents the latest in portable spray
technology. The TWISTER™XL 3 was developed to provide a powerful yet affordable
multi-purpose machine in a portable, lightweight package. Trials have proven the
TWISTER’s effectiveness, and that operator fatigue caused by the “gyroscopic effect”
associated with other types of hand-held gasoline powered sprayers is virtually
eliminated. Its simple operation and portable design, combined with the ability to
produce variable flow rates make the TWISTER™XL 3 is the most powerful machine of
its type for dispensing liquids in the 20 micron range. Backed by our Quality,
Workmanship and more than 60 years of service, we are confident that the
TWISTER™XL 3 will be a valuable addition to any spraying program.
Thank you for choosing Dyna-Fog
® .
For ard
The application of insecticides is the predominant method by which man attempts to
control the size of insect populations. Due to environmental and economical reasons, it
is desirable to treat a given area with the least amount of insecticide that can be made
effective. The most efficient method is to break up the liquids into aerosols and
distribute these fine droplets over the target area. The small droplets stay suspended for
longer periods of time due to their size and are distributed more evenly, remaining
effective longer.
The term ULV is an abbreviation for Ultra-Low-Volume, the technology used to treat
areas with small amounts of chemical in an aerosol form. These chemicals are usually
in a more concentrated state than chemicals used in other methods of application.
For best results, the Dyna-Fog ULV aerosol generator model 3950 should be operated
and maintained in compliance with this manual. Insecticides must be applied in
compliance with their label instructions.
WARNING
Read and thoroughly understand all information, cautions and arnings on the
formulation label hich may affect personal safety. Kno any dangers of the
solution used and kno hat to do in case of an accident involving the solution.
Al ays use the appropriate safety equipment and dress accordingly to the
chemical formulation hich is being used.

4
Machine Specifications
TWISTER™XL,
MODEL 3950 SERIES
4
Type
Aerosol Generator, Non Thermal, Insecticide, Ultra-Low-Volume (ULV). Using
ade uate orifice will produce larger droplets.
Engine
Honda GX
-
35
4-stroke, overhead camshaft, single cylinder. Gasoline
consumption: 25.7 oz/hour (760 ml/hour) approximate. Oil Type: 10 W-30. Oil
Capacity: 100 cc (3.4 fl. oz.) Operating Speed: 7,500 RPM, single Microtec™
nozzle.8,500 RPM, optional two Microtec™ nozzles.
Tanaka, Purefire™, 2-cycle, 40 cc, low emission engine. Gasoline
consumption: 26.7 oz/hour (800 ml/hour) approx.Operating Speed: 7,500
RPM, single Microtec™ nozzle.8,500 RPM, optional two Microtec™ nozzles.
Mix Gasoline: Oil 50:1 (refer to label on the Engine).
Blower
High speed Rotary type, 3-Stage, Belt driven, 95 cfm (2.68 m
3
/min)
unrestricted, pressure 3 psi. (.2 bar) max., tangential discharge, steel shaft
with two ball bearings.
Flow Control
Interchangeable restricting orifice to produce different flow rates, from 1.5
oz/min (45 ml/min) to 17 oz/min (500 ml/min).
Nozzle
Single high output Microtec™ nozzle. Optional extra twin nozzle kit for higher
output.
Tanks
Corrosion resistant, high density Polyethylene. Formulation: 1 U.S. Gallons
(3.78 liters). Gasoline: 33.3 oz (1 Lt)
Frame
High Strength Aluminum Tube
Droplet Size
90% of all droplets under 20 Microns (ULV) Mass Media Diameter (VMD)
depending on flow rate and viscosity. When the high flow rate is discharged
through the single nozzle, the machine will produce larger droplets for residual
deposit.
Acc
essories
Visual warning flag with flexible telescopic mast, Flowmeter to determine the
formulation viscosity, 2-cycle oil beaker, funnel.
Weight
27 lbs (12.2 Kg)
Dimensions
14.75 in (37.5 cm) L, 12 in (30.5 cm) W, 22.5 in (57.2 cm) H
Shipping Information (Boxed)
Dimensions
22.5˝ L x 19˝ W x 18˝ H (57.2 x 48.3 x 45.7 cm)
Volume
5.62 cu.ft. (.159 cu. meter)
Weight
37 lbs (16.8 Kg)

5
T ister XL-3 Main Components Diagram

6
AP
AIR
ONE
AIR
TUBE
INJE TION
NOTE:
SE TIONED
NOZZLE FOR
LARITY
HOW THE MI ROTE NOZZLE WORKS
FINS
Working Principles
The TWISTER™XL is powered by a 35cc 4-stroke GX-35 Honda or a 40cc 2-cycle Tanaka PF-
4000 gasoline engine. The TWISTER™XL is designed to take the weight and stress off the
operators hand and wrist to ensure ease and comfort when working. The engine and blower
assembly are mounted on a lightweight, padded
frame that is worn on the operator’s back.
The Engine is used to belt drive a 3-stage High-
Volume Blower. The engine has a “lever type” throttle
control that allows both idle and working engine
operating speeds. The blower supplies air thru a
flexible hose to the nozzle where the air creates
“suction” on the formulation supply tube. The suction
in the formulation supply tube causes liquid to be
drawn from the formulation tank, thru a restricting
orifice, into a shutoff valve and to the nozzle. The
nozzles have six stationary fins that create a swirling
effect of the air mass as it leaves each nozzle. In the
center of this swirling air mass is a liquid supply spray
tube.
The spray tube directs the formulation into the air mass where it is sheared into billions of tiny
droplets (10-20 micron) and propelled thru the air to their target.

7
Machine Operation
CAUTION
READ THIS COMPLETE OPERATION SECTION AND THE SECTION ON SAFETY
PRECAUTIONS BEFORE STARTING THE MACHINE FOR THE FIRST TIME.
When operating this machine for the first time, move to an uncongested and well-vented work
area away from flammable materials.
WARNING
READ THE SECTION ON SAFETY PRECAUTIONS BEFORE PREPARING TO DISPENSE
FORMULATION.
READ AND THOROUGHLY UNDERSTAND ALL INFORMATION, CAUTIONS AND
WARNINGS ON THE FORMULATION LABEL WHICH MAY AFFECT PERSONAL SAFETY.
KNOW ANY DANGERS OF THE SOLUTION USED AND KNOW WHAT TO DO IN CASE OF
AN ACCIDENT INVOLVING THE SOLUTION.
ALWAYS USE THE APPROPRIATE SAFETY EQUIPMENT AND DRESS ACCORDING TO
THE CHEMICAL FORMULATION WHICH IS BEING USED.
WARNING
• DO NOT USE ANY SUBSTANCES FROM UNMARKED CONTAINERS OR FROM
CONTAINERS WITH OBVIOUSLY ALTERED LABELS.
• READ AND FOLLOW THE INSTRUCTIONS ON THE CHEMICAL SOLUTION LABEL
FOR ULV SPRAYING OF THE SOLUTION.
• DO NOT SPRAY NEAR AN OPEN FLAME OR HOT MATERIALS.
• DO NOT LEAVE THE MACHINE UNATTENDED.

8
Pre-Spray Checklist
1. Verify that the operator came easily find and operate the engine kill switch, to stop
the machine, or allow it run.
2. Verify that the steam of the formulation (spray) ON/OFF valve is easy to rotate, to
open and close the valve, remaining in off position.
3. Verify that the engine has sufficient gasoline. If your Twister unit came with Tanaka
engine make sure the gasoline was properly mixed with 2-cycle oil.
4. Verify that the air inlet filter of the blower is clean and unrestricted.
5. Inspect all hoses for abnormal conditions.
6. Verify that no foreign objects and tools have been left in or about the machine.
7. Verify that the sufficient amount of formulation is in the tank and that the tank filling
cap is tight and air vent hole is not restricted.
8. Verify that the formulation line at the machine includes the appropriate flow control
orifice for the viscosity and recommended flow rate of the formulation intended to
dispense, in accordance with the manufactures label requirements.
9. Verify that the belt is in the right position on the sheave,
10. Verify the sight position of straps and belts on the frame before use the machine.
11. Verify that all safety equipment is in place and is in proper working order.
CAUTION
BEFORE PROCEEDING WITH ANY SPRAYING OPERATION, THE OPERATOR
SHOULD BE THOROUGHLY FAMILIAR WITH STARTING AND STOPPING THE
MACHINE WITH ALL THE OPERATING CONTROLS. IF YOU ARE OPERATING THE
MACHINE FOR THE FIRST TIME, EXERCISE THE MACHINE THROUGH ITS FULL
OPERATIONAL SEQUENCES FROM A POSITION OF FULL VISIBILITY OF THE
MACHINE BEFORE OPERATING THE MACHINE ON YOUR BACK. THIS IS ALSO A
GOOD IDEA FOR EXPERIENCED OPERATORS WHO MAY BE OPERATING A NEW
MACHINE OR WHO MAY BE REACTIVATING A MACHINE AFTER REPAIRS OR A
PERIOD INACTIVITY. REFER TO THE ENGINE SECTION FOR STARTING AND
STOPPING INSTRUCTIONS.

9
RUN
STOP
WORKING
IDLE
SPEED
THROTTLE
ONTROL
ENGINE
KILL
SWIT H
Honda GX-35 Engine Operation Instructions
FUEL
heck the fuel level by looking
through the translucent fuel
tank. If the fuel level is low,
refuel in a well-ventilated area
with the engine stopped. If the
engine has been running, allow
it to cool.
STARTING INSTRUCTIONS
Read and understand operation
manual before attempting to
operate machine.
1. Set throttle lever to idle speed. (bottom right diagram)
2. Set ignition switch (engine kill switch) to ON (Run) position (bottom right).
3. Depress priming bulb several times to purge air in the carburetor, until the flows trough
return pipe (bottom left diagram).
4. Pull choke lever upward to choke position/closed (bottom center diagram).
5. Pull recoil starter briskly, taking care to keep the handle in your grasp and not allowing it
to snap back.
6. When you hear the engine want to start, return the choke lever to the run position
(open). Then pull recoil starter briskly again.
Note: If engine does not start,
repeat procedures 4 to 6.
7. After starting, allow the
engine to warm-up 2 to
3 minutes (at idle
speed) before
operating at higher
speeds for fogging
operations.

10
RETURN
PIPE
PRIMING
BULB
HOKE
LEVER
RE OIL
STARTER
RUN
STOP
WORKING
IDLE
SPEED
THROTTLE
ONTROL
ENGINE
KILL
SWIT H
Fig 6
Fig 5
Fig 4
Tanaka PF-4000 Engine Operation Instructions
WARNING
The T ister™ XL is equipped ith a t o-stroke
engine. Al ays run the engine on gasoline, hich is
properly mixed ith oil.
FUEL
Use unleaded gasoline with an 89 octane or higher rating. Use a quality two-cycle at mixing
ratio of 50:1 (right diagram). Always mix gas and oil in a separate clean container. Mix the
gasoline thoroughly before filling the engine fuel tank.
STARTING INSTRUCTIONS
Read and understand operation manual before attempting to operate machine.
1. Set throttle lever to idle speed. (bottom right diagram)
2. Set ignition switch (engine kill switch) to ON (Run) position (bottom right).
3. Depress priming bulb several times to purge air in the carburetor, until the flows trough
return pipe (bottom left diagram).
4. Pull choke lever upward to choke position/closed (bottom center diagram).
5. Pull recoil starter briskly, taking care to keep the handle in your grasp and not allowing it
to snap back.
6. When you hear the engine want to start, return the choke lever to the run position
(open). Then pull recoil starter briskly again.
Note: If engine does not start, repeat procedures 4 to 6.
7. After starting, allow the engine to warm-up 2 to 3 minutes (at idle speed) before
operating at higher speeds for fogging operations.