Clarke 16LPB, 20LPB, 3402272, 3402277 User guide

16/20LTR BACK PACK HAND PUMP

SPRAYERS

MODELS:16LBP/20LBP

PART NO: 3402272 & 3402277

USER INSTRUCTIONS

ORIGINAL INSTRUCTIONS GC0219 ISS2

INTRODUCTION

Thank you for purchasing this CLARKE Sprayer, designed only for use with
insecticides or other water-based products.

Before attempting to use this product, please read this manual thoroughly and
follow the instructions carefully. In doing so you will ensure the safety of yourself
and that of others around you, and you can look forward to your purchase
giving you long and satisfactory service.

GUARANTEE

This product is guaranteed against faulty manufacture for a period of 12
months from the date of purchase. Please keep your receipt which will be
required as proof of purchase.

This guarantee is invalid if the product is found to have been abused or
tampered with in any way, or not used for the purpose for which it was
intended.

Faulty goods should be returned to their place of purchase, no product can
be returned to us without prior permission.

This guarantee does not effect your statutory rights.

GENERAL SAFETY PRECAUTIONS

1. Never use this sprayer to store or spray flammable solvent-based
chemicals.

2. Empty the contents if the sprayer is not to be used for long periods.

3. If insecticide is being sprayed, always wear a protective mask, safety
glasses, footwear, overalls and gloves to protect the skin and face. Never
spray chemical products facing into the wind.

4. Never spray pesticide towards other people, animals or foodstuffs.

5. Never use the sprayer for handling hot liquids and avoid operating in
excessively hot environments.

6. Always comply with any applicable insecticide manufacturers safety
instructions/directives before use.

7. Stop using the sprayer if the container or hose is found to be damaged.

8. Always ensure all hose and lance connections are tight and leak-free.

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Parts & Service: 020 8988 7400 / E-mail: [e-mail] or [e-mail]

ASSEMBLY

The sprayer is supplied with an accessories pack containing the following
items. The numbers in brackets refer to the diagram/list on pages 6 & 7Any
deficiencies should be reported to your Clarke dealer..

2 x Connecting collets (46) 1 x Handle securing clip (17)

3 x Spray nozzles (Twin headed (53),
Conical (54) and Flat Fan (55)

1 x Piston cup seal (4)

1. Push the lance into the trigger
assembly and secure with the
screw cap containing the collet
and O-ring.

2. Attach one of the nozzles to the
other end of the lance and
secure with the screw cap.

3. The shoulder straps can be
adjusted for length using the
buckles, so as to position the
sprayer comfortably on the operators back, ensuring they are not twisted.

1 x Complete set of O-rings

• 3 x to fit nozzles (53/54/55)

• 2 x to fit lance (47)

• 2 x to fit spray gun body (34)

• 1 x thin/1 x thick to fit trigger
valve piston (35/36)

OPERATION

1. Unscrew the container filler cap
and ensure the filter is in place.

2. Fill the container with the required
liquid up to the desired
graduation on the end and
replace the filler cap.

3. Pump the operating arm a few
times to pressurise the container
until the pump action stiffens.

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Parts & Service: 020 8988 7400 / E-mail: [e-mail] or [e-mail]

4. Squeeze the trigger of the spray
gun to start spraying.

5. If spraying continuously, squeeze
the trigger and engage the
trigger lock by sliding it back with
your thumb.

6. Pump the operating arm when
necessary to maintain pressure.

• The sprayer will require regular

re-pressurising approx every

0.3-0.5L to maintain the optimum output pressure.

7. Secure the operating arm in its retaining clip when not in use. Likewise

attach the lance to the clip on the operating arm.

MAINTENANCE

AFTER USE

After use, the sprayer should be flushed thoroughly with clean water to avoid
the possibility of blockages from product residue, or any cross-contamination
between different products.

After extensive use, unscrew the

trigger body and remove and clean
the filter inside the trigger assembly.

If not used for long periods or used
continuously for several days, add a
light smear of vaseline to the sealing
washers and moving parts to reduce
wear and assist free movement.

REPLACING THE PISTON CUP SEAL

In order to lubricate or replace the
piston cup seal with the spare item
supplied, the pump assembly can be
removed as follows:

1. Remove the split pin and release
the retaining clip from the
operating rod.

2. Withdraw the operating rod from
the top of the pump assembly.

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Parts & Service: 020 8988 7400 / E-mail: [e-mail] or [e-mail]

3. Unscrew the retaining ring and withdraw the pump from the container.

• The pump will lift out of the container, complete with felt seal and

rubber o-ring.

4. Draw the piston out of the cylinder
to expose the cup seal.

5. Prise the cup seal off the piston
and fit the replacement, making
sure to smear a layer of vaseline
before re-assembly.

6. Re-assemble the components in
reverse order.

FAULTFINDING

Symptom Cause Remedy

Poor delivery and
leaking lance.

Operating handle
stiff/hard to move.

After pumping the
unit to pressurize

the chamber,
pressure is quickly
lost as soon as the

pump is operated.

After pumping the
unit to pressurize
the chamber, the
lever rises slowly
when released.

Handle is hard to
operate and
sprayer only
discharges air
without water.

Loose connections or
damaged connecting col­lets/o-rings.

Filter screen or spray head is
blocked.

The piston, sealing ball or
sealing ring may be
damaged or out of position.

The chamber valve is not
seating correctly due to
wear or foreign material
present.

The hose in the air chamber
may have come off.

Inspect condition of
connecting collets and o­rings & replace if necessary.

Clean out the filter screen
and spray head.

Dismantle unit and refit
loose or damaged parts.

Clean or replace the valve.

Remove end nut and drain
out any water. Insert suction
hose tightly into the plastic
tube and apply waterproof
adhesive to the joint.

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COMPONENT PARTS

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COMPONENT PARTS

No Description No Description

1 Fixing clamp 29 Spray gun handle

2 Handle securing clip 30 Trigger lock

3 Air chamber 31 Pivot pin

4Piston cup seal 32Filter

5 Ball 33 Sealing washer

6 O-ring 20.5 x 2.5 34 Spray gun body

7 Locking nut 35 O-ring

8 Operating handle 36 O-ring

9 Split pin 37 Trigger valve piston

10 Collet 38 Spring

11 O-ring 39 Screw cap

12 Air chamber lid 40 Trigger

13 Felt ring 41 Shoulder pad

14 Pump cylinder gasket 42 Shoulder strap

15 Pump cylinder 43 Straight tube

16 Container 44 Strap sleeve

17 Handle securing clip 45 Strap hook

18 Locking wedges 46 Collet

19 Base 47 O-ring

20 Buckle 48 Nozzle body

21 Filter screen 49 O-ring

22 Sealing ring 50 O-ring

23 Container lid 51 O-ring

24 Vent plug 52 Nozzle cap

25 Flexible hose 53 Twin headed nozzle

26 Locking cap 54 Conical style nozzle

27 Collar 55 Fan style nozzle

28 Internal bush 56 Lance Assembly (complete)

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Parts & Service: 020 8988 7400 / E-mail: [e-mail] or [e-mail]