MESTO 3552A Garden Sprayer Instruction Manual

MESTO 3552A Garden Sprayer

Specifications

• Model: 3552A, 3552, 3558A, 3558
• Capacity: 12 Liters (3552A, 3558A), 18 Liters (3552, 3558)
• Pressure: 6 bar
• Weight: 4.5kg (3552A), 4.8kg (3552), 16.5kg (3558A), 22.8kg (3558)
• Material: Polypropylene
• Flow rate: 1.4 l/min at 6 bar

FAQs

Q: Where can I find the address for customer support?

A: You can find our address on the title page of the instructions for use.

Q: What safety measures are important when using the device?

A: Particular safety measures are required when working with the device. Please refer to the safety instructions provided.

Spare Parts

OVERVIEW

PRODUCT INFORMATION

Welcome and congratulations

on purchasing your new quality product. Thank you for the trust you have shown in our brand. Your satisfaction with our product and services is very important to us. Please contact us if your expectations are not met. You will find our address on the title page of these instructions for use.

• Make certain to read the instructions for use before using the device!
• Keep the instructions for use in a safe place where they can be easily found. The instructions for use are an integral part of the device and must be enclosed when the device is passed on. Particular safety measures are required when working with the device.

Usage

The backpack spraying device is designed for the spraying of plant protection products, including weed killers in the stipulated concentrations, as well as cleaning agents, disinfectants and construction chemicals. The spray product manufacturer has to approve that they can be applied with spraying devices. Nitric acid, acetic acid and propionic acid must only be used in concentrations of up to 10 %, phosphoric acid and sulphuric acid in a concentration of up to 30 %, and potassium hydroxide solution and caustic soda in a concentration of up to 20 %. At the time of manufacture, there are no known harmful effects to the device caused by plant protection products approved by the Federal Office of Consumer Protection and Food Safety.

• Improper use may result in dangerous injuries and environmental damage.

Follow the safety notices and data sheets of the substance manufacturers before each application. Observe the specified maximum concentrations for chemical substances and preparations. We will be happy to advise you on what best suits your needs.
Observe the legal and statutory regulations applicable in your country. The device may be used outdoors or in well-ventilated rooms only. Have the salesperson or an expert show you how to operate the device if you are working with it for the first time. Not suitable for

• inflammable liquids
• corrosive substances (certain disinfecting and impregnating agents, acids and bases)
• liquids containing ammonia
• liquids at temperatures above 40 °C (104° F)
• wetting agents (surfactants), solvents, and liquids containing solvents that can cause or promote cracking in the applied plastics
• viscous or sticky liquids or liquids that form residues (dyes, greases)
• use in applications for foodstuffs

Under no circumstances should you use

• external sources of pressure without the original compressed air filling valve
• for flaming
• for storing and holding liquids
• as an eyewash

Safety

• Only trained, healthy, and rested people may work with the device. You should not be under the influence of alcohol, drugs or medication. Children and adolescents must not use the device Keep the spraying devices safe from access to children. Take precautions to prevent hazardous substances from being misused. → Accident risk!
• Keep bystanders away during spraying. Never spray on people, animals, electrical devices, and lines, into the wind, or into bodies of water. → Risk of injury!
• Wear appropriate protective clothing, goggles, and respiratory protection in line with the applicable national regulations when working with hazardous substances. Avoid ignition sources in the environment.
• Do not allow the device to remain under pressure and/or be exposed directly to sunlight. Make certain the device is not heated beyond the maximum operating temperature. (→Table 1). Protect the device from frost and ammonia.
• Never blow through the nozzles or valves with your mouth. → Risk of poisoning!
• There is a risk of slipping or tripping on smooth or wet surfaces, snow, ice, on slopes, and on uneven terrain.
• Repairs and modifications to the device are not permitted. Have damaged parts or parts that do not work properly repaired immediately by our customer service department or by service partners authorized by us.
• The effect of the safety valve must not be bypassed or made inoperative. → Explosion hazard!
• Use only original spare and accessory parts. We cannot assume any liability resulting from the use of third-party parts.
• When pumping, always observe the pressure gauge to ensure the maximum spraying pressure is not exceeded (→ Table 1). All excess pressure must be released from the device before filling, after use, before carrying out maintenance work, on work breaks, and before placing it in storage.
• Points to note when transporting the device: Transport the device in such a way that it is protected against damage and tipping. All excess pressure must be released from the device. → Explosion hazard!

Scope of delivery

Carrying strap [1], tank [2], carrying handle [3] (for 18 liter devices only), small parts kit [4], instructions for use [5], hose [6], spray wand [7], shut- off valve [8], back cushion or hip belt with back cushion [9] (not for all models), pump lever [10] and handle [11]. (Figs. 1a and 1b)

Technical data

(0.07 US gallons)

| < 0.27 liters

(0.07 US gallons)

Max. volume flow| 1.4 l/min (0.53 gal/min) at 6 bar (88 psi)

Assembly

1. Fasten the carrying strap [1] to the tank. Secure it with the metal pin [12]. (Fig. 2)
2. Attach the eyes [13] on the carrying strap [1] to both sides of the tank.
3. Attach the back cushion [9] to the tank using 2 bolts (outside) and 2 nuts with washers (inside) [2]. (Figs. 2 and 3)
4. Press the 2 nuts [14] into the carrying handle [3] (for 18-liter devices only). Insert the carrying handle and screw tight with the 2 screws [15] in the tank [2]. (Fig. 3)
5. Feed the hose [6] through the opening in the lower part of the tank as well as between the shaft [16] and tank base. Push the hose all the way onto the connecting piece [17]. Tighten the union nut to secure the hose. (Fig. 4)
6. Push the hose [6] all the way onto the connecting piece of the shut-off valve [8]. Tighten the union nut to secure the hose. (Fig. 4)
7. Screw the spray wand [7] onto the shut-off valve [8]. (Fig. 4)
8. Turn the shaft [16] clockwise until it engages. Insert the pump lever [10] to the required depth into the shaft [16] (3 positions). (Fig. 5)
   • Pump lever [10] with handle can be fitted on the left or right.
9. Secure the pump lever [10] in the shaft using the retaining clip [18]. (Fig. 5)
10. Push the handle [11] to the required position (A, B, C) into the pump lever [10]. (Fig. 5) + Ensure that the handle is locked in place in the pump lever.

Checks

Visual inspection:

1. Are tank [2], hose [6], shut-off valve [8] with pressure gauge [22] and spray wand [7] with nozzle [41] undamaged? + Pay special attention to the connections between the tank [17] – hose [6] and the hose [6] – shut-off valve [8] and to the condition of the spray wand [7].
   • Function:
2. Activate the pump lever [11]. (Fig. 8)
   • Increasing pressure is indicated on the pressure gauge [22]. (Figs. 8 and 9) + The wheel lock [23] can be used to lock and unlock the lever on the shut-off valve [8]. Locking the lever [23b] prevents unintentional spraying.
3. Unlock the wheel lock [23a] and activate the shut-off valve [8]. (Fig. 9)
   • The shut-off valve must open and close.

Check the device regularly and after a longer period of non-use, e.g. a winter break. Have damaged parts or parts that do not work properly repaired immediately by our customer service department or by service partners authorized by us.

Preparation

Observe the instructions in the section entitled „Safety“. The device must be in an upright position. If filling the tank from a water line, ensure that the line or a hose does not project into the tank.

1. Screw the cover [19] off the tank. (Fig. 6)
   • Measuring cups [20] are integrated in the cover [19] and can be used to prepare the spraying agent. Fill the tank 1/3 with water, pour in the spraying agent, and then fill up with water.
2. Pour the spray liquid through the filling strainer [21] into the tank. (Fig. 7)
   • In the case of 18 liter devices the maximum filling quantity is reached as soon as the liquid level can be seen in the filling strainer.
3.  Screw the cover [19] onto the tank. (Fig. 6)

Spraying

Observe the instructions in the section entitled “Safety”. Operate the device only while it is vertical or suspended upright and nearly vertical. Avoid allowing drops of spray to drift onto areas that are not being treated. Observe the instructions of the spray product manufacturer!

1. Place the device on its back. (Fig. 8)
2. Using the pump lever [11], pump slowly and regularly to maintain a continuous spraying pressure. (→ Table 2, Fig. 8)
   • Max. pressure should not exceed 6 bar. If the maximum pressure is exceeded, the pressure relief valve will actuate and release the excess pressure from the pressure vessel.
   • To prevent dripping, hold the spray wand up when first spraying and activate the shut-off valve until no more liquid mixed with air is emerging from the nozzle.
3. Ensure that the optimum spraying pressure is set on the pressure gauge [22] (Figs. 8 and 9).

If liquid mixed with air emerges from the nozzle, the tank is empty. Pump the device completely empty after each fifth filling at the latest.

After Usage

Observe the instructions in the section entitled “Safety”. Never leave liquid in the device.

1. Activate the shut-off valve [8] until the spray line is depressurized.
2. Screw the cover [19] off the tank. (Fig. 6)
3. Dilute the remaining quantity twice in a row with 1/2 liter of water each time and spray the resulting liquid onto the treated area.
   • Collect and dispose of the residual liquid and the tank according to all applicable laws, requirements and regulations. Follow the instructions of the spray product manufacturer!
4. Wipe off the device with a moist cloth.
5. For drying and storing the device, remove the cover and keep the device in a dry place protected from sunlight and freezing temperatures.

Clean the protective equipment and yourself every time after usage.

Care and maintenance

Observe the instructions in the section entitled “Safety”.

After using the device 50 times or if the device malfunctions, at least once a year, preferably after the winter break:

1. Grease the diaphragm [24]. (Fig. 10)
2. Oil the pump rod [33]. (Fig. 20)
3. Grease the bearings on the shaft [16]. (Fig. 12)
4. Clean the nozzle [41] and the insert [40] under running water. If required use a brush. (Fig. 18)
5. Clean the filter [38] under running water. (Fig. 17) (→ „Disassembling the shut-off valve“)

Observe the legal requirements of your country for accident prevention and check the device in regular intervals. Unless otherwise specified, we recommend that an expert carries out an external test every 2 years and an internal test every 5 years as well as a strength test every 10 years.

Maintaining the intake valve

1. Press the catch [25] out of the notch. Screw the cylinder [27] out of the tank. (Fig. 10)
2. Clean and, if required, replace the valve disc [28]. (Fig. 11) + When replacing the valve disc, insert the new valve disc [28] and press and turn it
   into the opening, using a wooden object (e.g. hammer shaft). (Fig. 11) + To seal the tank, ensure that the O-ring [26] is correctly positioned. (Fig. 10)

• To prevent damage to the diaphragm [24], carefully insert the cylinder [27]. (Fig. 10)

  3. Screw in the cylinder [27] until the catch [25] engages in the first tooth of the notch. (Fig. 10)

Maintaining the pressure valve

1. Press the catch [25] out of the notch. Screw the cylinder [27] out of the tank. (Figs. 10 and 13)
2. Remove the pressure vessel [34]:
   • a) Remove the fixing [30] and cap [29]. (Fig. 12)
   • b) Remove the U-bolt [32]. (Fig. 12)
   • c) Pull the pressure vessel [34] half out of the tank. (Fig. 13)
   • d) Using the filling strainer [21], unscrew the pressure valve screw [35]. (Fig. 14)
3. Clean and, if required, replace the pressure valve disc [28]. (Fig. 14)
4. Clean and, if required, replace the diaphragm [24]. (Fig. 14)

Removing the shaft and pull rod

1. Remove the retaining clip [18]. (Fig. 15)
2. Pull the pump lever [10] and handle [11] out of the shaft [16]. (Fig. 15)
3. Remove the fixing [30] and the cap [29]. (Fig. 16)
4. Detach the pull rod [31] from the pump rod [33]. (Fig. 16)
5. Pull the shaft [16] and pull rod [31] out of the tank. (Fig. 16)
6. Remove the lock washer [36] and the bolt [37]. (Fig. 16)
7. Separate the pull rod [31] from the shaft [16]. (Fig. 16)

Replacing the O-ring on the pump rod

1. Remove the fixing [30] and cap [29]. (Fig. 12)
2. Detach the pull rod [31] from the pump rod [33]. (Fig. 12)
3. Using a spark plug wrench, unscrew the guide bush [49]. (Fig. 21)
4. Replace the O-ring [50]. (Fig. 21)

Disassembling the shut-off valve

1. Unscrew the handgrip [39] from the shut-off valve. (Fig. 19)
2. Unscrew the adapter [42]. (Fig. 19)
3. Loosen the 4 screws and pull the half shells [44] apart. (Fig. 19)
4. Unscrew the locking cap [45] from the valve body [48]. (Fig. 19)
5. Pull the pressure bolt [46] out of the valve body [48]. (Fig. 19)

Faults

Use only original spare and accessory parts.

No pressure builds up in the device.

Pump lever with handle [11] can be moved very easily.

| Diaphragm [24] is defect-

tive.

| Replace the diaphragm.

(Fig. 14)

Foreign object prevents

the valve disc [28] from closing

| Clean intake or pressure valve

(Figs. 11 and 14)

Valve disc [28] of the intake or pressure valve

defective.

| Replace valve disc.

(Figs. 11 and 14)

Pump lever with handle [11]

is pulled downwards.

| Intake valve [27] sticking.| Clean intake valve. (Fig. 11)
Pump lever with handle [11] is pulled upwards.| Foreign object prevents closure of the pressure valve [35] or defective valve disc [28].| Clean the pressure valve or replace the valve disc. (Fig. 14)
The pump lever with handle [11] is locked or can be moved downwards with difficulty only.| Diaphragm [24] and/or guide bush [49] not lubricated.| Lubricate diaphragm and/or guide bush (Figs. 10, 20)
Pressure valve [35] dirty.| Clean pressure valve. (Fig. 14)
Filter [38] and/or nozzle [41] blocked.| Clean filter (Fig. 17) and/or nozzle (Fig. 18).
Only a jet emerges, there is no atomization.| Nozzle insert [40] is mis-

sing.

| Position the insert in the nozzle.

(Fig. 18)

Nozzle [41] dirty.| Clean nozzle (Fig. 18)
Liquid dripping from the nozzle.| Foreign object in the nozzle [41] or/and the insert [40].| Clean nozzle and/or insert.

(Fig. 18)

Device sprays only when pumped.| Pressure vessel [34] completely filled with liquid.| The pump device completely empty. Repeat after 5 fillings at the

latest.

The shut-off valve does not close.

Liquid comes out without

the pump lever being activated.

| The O-ring [47] of the pressure bolt [46] is not greased.

O-ring [47] defective.

| Grease the O-ring of the pressure bolt. (Fig. 19)

Replace the pressure bolt or

O-ring. (→ „Disassembling the shut-off valve“)

Warranty

We guarantee that from the time it is first purchased for a period of the legally valid required warranty period (maximum 3 years) this device will not exhibit any material or processing errors. If defects are discovered during the warranty period, the manufacturer or the distributor in your country will repair the device without charging for the labor or material or (at the discretion of the manufacturer) replace the device itself or its defective parts. If such defects are discovered, please contact us immediately. We require the invoice or cash register receipt for the purchase of the device. The warranty does not include wearing parts  (seals, O-rings, diaphragm, etc.) or defects, which have occurred due to improper use or unforeseeable circumstances.

Declaration of Conformity

according to EC Machinery Directive 2006/42/EC, Appendix II, No. 1A.

• Applicable standards:
• DIN EN ISO 19932-1: 2013
• DIN EN ISO 19932-2: 2014
• We, MESTO Spritzenfabrik Ernst Stockburger GmbH, Ludwigsburger Straße 71,
• D-71691 Freiberg,
• declare under our sole responsibility that the devices of the series 3552A, 3552, 3558A, 3558, as supplied, meet all the relevant requirements of Directive 2006/42/EC.
• Rolf Rehkugler is authorized to compile the technical documentation.

Freiberg, 01.12.2016 Bernd Stockburger – Managing Director

The data and illustrations in these instructions for use are for orientation only and not binding in any way. The manufacturer reserves the right to make changes or improvements to the products if these are considered appropriate without having to notify customers owning a similar model about this fact.

CONTACT INFORMATION

• MESTO Spritzenfabrik Ernst Stockburger GmbH Ludwigsburger Straße 71, D-71691 Freiberg/Neckar
• Tel.: +49 7141 272-0, Fax: +49 7141 272-100
• info@mesto.de,
• www.mesto.de

References

• MESTO | Hersteller von Sprühgeräten

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