Teryair N-28 Instruction Manual

Models Descriptions IMPA Code
N-28 Pistol Grip Pneumatic Needle Scalers (polished) 59 04 64
HN-28 Pistol Grip Pneumatic Needle Scalers (painted)
N-24 Pistol Grip Pneumatic Needle Scalers (polished) 59 04 63
HN-24 Pistol Grip Pneumatic Needle Scalers (painted)
SN20ST In-line Pneumatic Needle Scalers 59 04 62
SN16PG Pistol Grip Pneumatic Needle Scalers 59 04 61
N-28 / HN-28
Read this manual carefully before installing, operating or servicing this equipment. It’s the responsi-
bility of the employer to ensure this manual is read by the operator. Please preserve this manual.
is document is issued with Product Serial No
Operation and Maintenance Guide
N-24 / HN-24
SN20ST SN16PG

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Page 2
Operation and Maintenance Guide Pneumatic Needle Scalers
Table of Contents
3
3
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
19
20
Introducon
Technical Data
SafetyInstrucons
OperangInstrucons
SuggestedLubricants
DiassemblyandRe-assemblyforN-28/HN-28
BillofMaterialsforN-28/HN-28
ExplodedViewforN-28/HN-28
DiassemblyandRe-assemblyforN-24/HN-24
BillofMaterialsforN-24/HN-24
ExplodedViewforN-24/HN-24
DiassemblyandRe-assemblyforSN20ST
BillofMaterialsforSN20ST
ExplodedViewforSN20ST
DiassemblyandRe-assemblyforSN16ST
ExplodedViewforSN16ST
BillofMaterialsforSN16PG
EuDeclarationOfConformity
WarrantyCertificate

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Operation and Maintenance Guide Pneumatic Needle Scalers
Introduction
Teryair needle guns are rugged tools. ey are designed to be easy to use and maintain. ey are
ideal for removing layers of paint, corrosion and chemical coatings etc. from metal and non metal
surfaces. ese tools work well on irregular surfaces and in crevices and corners. e needles are
heat treated and are quickly replaceable.
Safety Instructions
Warning
is manual must be read and the operating
instructions carefully followed.
Warning
Safety and protective clothing, eyewear, head-
gear, ear protection, gloves and footwear to be
worn during operation of this Pneumatic Needle
Scaler. Please see Table A at end of this section.
Warning
Operators under 18 not allowed to operate this
Pneumatic Needle Scaler. Operators must be
made familiar with the instructions in this
manual before attempting to operate the Pneu-
Following symbols are used through out this
manual.
Intended Use
• Marine and Oshore industries
• Removal of Coatings
• Hold cleaning, general deck and surface
cleaning, removal of heavy rust on tankers
and dry dock
• applications
• Tank descaling, Descaling of structures
prior to painting.
• Paint removal
• Other industrial coating removal from
oors and other surfaces
• Removal of concrete residue from re-bar
Cleaning cement from plant and vehicles
• Weld cleaning
Prohibitive use
• Any use in an explosive atmosphere is
prohibited
• Use on materials containing asbestos is
prohibited
• Use by an underage, untrained or person
who is under the inuence of drugs or
alcohol.
• Use with non-genuine spare parts or
accessories is prohibited
Technical Data
Models
IMPA
Number
equivalent
Maxi-
mum
operating
pressure
Air
Consumption
(No Load)
Blows
per
min
Sound
Power
Level
(Load)
Vibration
Level
Mass
(Weight)
Thread
Size of
Air Inlet
Needles
CFM m3/
min (BPM) LwA b(A) m/s2 Kg
N-24 (polished) /
HN-24 (painted) 59 04 63
6kg/cm2
(90 psi)
9.5 0.27 4000 104 28 2.7 3/8" 3mm x 23
Nos.
N-28 (polished) /
HN-28 (painted) 59 04 64 12 0.34 4500 106 17.5 3.5 3/8" 3mm x 28
Nos.
SN16PG 59 04 61 5 0.14 4000 101 11.5 1.4 3/8" 2mm x 29
Nos.
SN20ST 59 04 62 7.00 0.20 4000 103 15.5 2.4 3/8" 3mm x 12
Nos.

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Operation and Maintenance Guide Pneumatic Needle Scalers
• Eye and faceand ear protection must be worn
at all times during operation of the
Pneumatic Needle Scaler. ere is a chance
of ying debris from the jobsite and the
quality of wear should be such to protect
against such ying debris such as akes of
the removed layer.
• Suitable gloves must be worn at all times
during operation.
• Safety Shoes with toe cap protection are a
must during operation.
• Scalers are rugged dependable tools designed
to give you years of satisfactory service.
Follow the instructions mentioned here to
enhance life and performance of your scalers.
Daily Before Operating
Disconnect and pour in 1 to 2 ounces of
recommended oil into the Pneumatic Needle
Scaler and reconnect hose aer blowing out any
accumulated dirt in the hose line before
connection
Lubrication Requirements
Always install a line lubricator on the air line as
close to the Pneumatic Needle Scaler as possible.
A Filter Regulator Lubricator unit (FRL)is
strongly recommended. Keep the lubricator bowl
topped up with recommended grade of oil and
check that the oil is reaching the Pneumatic Nee-
dle Scaler. Running the Pneumatic Needle Scaler
without lubrication is likely to cause damage to
the components causing premature replacement.
Operating Instructions
matic Needle Scaler. Ensure that job site is
clear of bystanders
Caution
Use only genuine Teryair or Teryair approved
accessories.
Warning
is Pneumatic Needle Scaler is not designed
for use in an explosive environment.
Caution
Completely turn o the Pneumatic Needle
Scaler and disconnect air supply line before
attempting any service. Read Assembly and
Disassembly instructions.
Warning
Take care not to exceed the maximum 6 bar
(90 psi) supply air pressure. Use a lter and
regulator and lubricator as close to the Pneu-
matic Needle Scaler inlet as operation will
allow ensuring a clean and regulated and
lubricated air ow.
Caution
Do not exert excessive pressure against the
work surface. Keep hoses in good condition.
Check hoses for signs of wear, cracks & bulges
and ensure that they are secure. Accidental
disconnection while hose is pressurized makes
the hose whip and can be a safety hazard.
Caution
• Please check the hose connection prior to
starting Needle Scaler.
• Be aware that these Pneumatic Needle
Scalers can create dust & ying debris.
• Keep hands & clothing away from moving
parts.
• Store these Pneumatic Needle Scalers in
secure & dry environment.
• Do not allow the Pneumatic Needle Scaler
to run unattended.
• Do not modify this Pneumatic Needle
Scaler in any way as this will invalidate the
warranty and could lead to serious injury.
• Do not allow the Pneumatic Needle Scaler
to run continuously whilst not in contact
with the surface being prepared.
• Do not hold the exposed needles whilst
the Pneumatic Needle Scaler is in use
this could cause vibration damage to the
hands.
• Do not drag this Pneumatic Needle Scaler
by air hose.
Warning
Do not use the Pneumatic Needle Scaler in
potentially explosive environments.

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Operation and Maintenance Guide Pneumatic Needle Scalers
Suggested Lubricants
Brand Above 27C / 80F 5C to 27C / 41F to 80F Below 5C / 80F
Shell Toona R 72 Toona R 41 Toona R 27
Mobil Almo 529 Almo 527 Almo 525
Esso -- Arox EP.65 Arox EP.45
Caltex Rando Oil 100 Rando Oil 100 Rando Oil 46
Cp -- -- Airolene Tool OiI
Texaco Regal Oil F (R&O) Regal Oil PE(P&E) Regal Oil PE(R&O)
Daltron Silkolene 881 Silkolene 548/T Silkolene 733
Burmah Castrol Castrol RD Oil 3 Castrol RD Oil Light Megna SPX
Duckham Garnet 7 Garnet 6 Zero Fio 5
Sternol Merlin 87 Merlin 71 Merlin 54
Petrona Purifoc 53 Purifoc 46 Purifoc 32
Chevron Vistac Oil 18X Vistac Oil 19X Vistac Oil 9X
Indoil Servo Spyn -22 -- --
Air Supply
e Scalers work best at 6.2 bar (90 psi) air pres-
sure. e air should be clean, dry and lubricated.
Install a FRL unit as close as operation will
permit.
Hoses
Daily before operation check the hoses, especial-
ly the high pressure hoses for damage or leaks
Use genuine Teryair spares and if possible men-
tion the serial number of the Pneumatic Nee-
dle Scaler when ordering spares. Use genuine
Teryair spares and if possible mention the serial
number of the Pneumatic Needle Scaler when
ordering spares.

FF-MM-300-REV - 00
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Operation and Maintenance Guide Pneumatic Needle Scalers
Diassembly and Re-assembly for N-28 / HN-28
a. Shut o air supply and allow residual
Pressure to bleed o.
b. Unscrew Clamp Bolt (2) from Needle
Guide (1) to remove Needle guide (1)
c. Remove Safety Band (9) from Stop Ring
(3). Now Unscrew Stop Ring (3) from
Cylinder (10) and replace it with new one.
(If found damaged/worn-out)
d. Remove Needle Supporter (4) with
Needles (5) & rottle Anvil (6) from
Cylinder (10). Now remove Needles (5)
from Needle Supporter (4).
e. Unscrew the Rear Bolt (18) with Rear
Washer (14) & Piston (7) from Cylinder
(10). Now remove Cylinder Lock Pin (11)
from Housing (13) and replace it with new
one. (If found damaged/Worn-out).
f. Remove Cylinder (10) from Housing (13)
g. Remove Front Washer (12), O-ring
Cylinder (8) and from Cylinder (10) and
replace it with new one.
h. Now remove Lever Pin (20) from rottle
lever (19) to remove rottle lever (19)
from Housing (13) and replace it with new
one. (If found damaged/Worn-out)
i. Unscrew Valve Cap (17) with Valve
Packing (16) from Housing (13). Now
remove rottle Valve Assembly (15) from
Housing (13) and replace with new ones.
(If found damaged/worn-out)
j. Coat parts with the recommended light
oil before re-assembling. Now follow the
above steps in reverse manner to
reassemble the Needle Scalers…

FF-MM-300-REV - 00
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Operation and Maintenance Guide Pneumatic Needle Scalers
Bill of Materials for N-28 / HN-28
Illustration
Number Part Number Description N 28
1 022 90 35 NEEDLE GUIDE 1
2 022 90 62 CLAMP BOLT 1
3 022 90 01 STOP RING 1
4 022 90 03 NEEDLE SUPPORTER (3MM) 1
- 022 90 05 NEEDLE SUPPORTER (4MM) 1
- 022 90 07 NEEDLE SUPPORTER (2MM) 1
5 022 90 04OL NEEDLE (3MM X 180MM) 28
- 022 90 06 NEEDLE (4MM X 180MM) 14
- 022 90 08 NEEDLE (2MM X 180MM) 65
6 022 90 09 THROTTLE ANVIL 1
7 022 90 11 PISTON 1
8 022 90 12 O -RING CYLINDER 2
9 022 90 13 SAFETY BAND 1
10 022 90 14 CYLINDER 1
11 022 90 23 CYLINDER LOCK PIN 1
12 022 90 17 FRONT WASHER 1
13 022 90 45 HOUSING 1
14 022 90 21 REAR WASHER 1
15 022 90 29A THROTTLE VALVE ASSEMBLY. 1set
16 022 90 27 VALVE PACKING 1
17 022 90 25 VALVE CAP 1
18 022 90 47 REAR BOLT 1
19 022 90 31 THROTTLE LEVER 1
20 022 90 33 LEVER PIN 1
Standard Accessories
Part No Description Qty
022 40 52 HOSE NIPPLE ( FOR QC FITTING OF
30SH,30SM & 30SF) 1
Optional Accessories
Part No Description Qty
022 90 43 HOSE NIPPLE 1
022 90 41 REDUCER 1

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Operation and Maintenance Guide Pneumatic Needle Scalers
Exploded View for N-28 / HN-28
17
16
15
20
19
10
7
13
18
11
8
14
12
1
3
4
5
6
2
9

FF-MM-300-REV - 00
Page 9
Operation and Maintenance Guide Pneumatic Needle Scalers
Diassembly and Re-assembly for N-24 / HN-24
a. Shut o air supply and allow residual
Pressure to bleed o.
b. Unscrew Clamp Bolt (2) from Needle Guide
(1) to remove
c. Now Unscrew Stop Ring (2) from Cylinder
(8) and replace it with new one. (If found
damaged/Wornout)
d. Remove Needle Supporter (6) with
Needles (5) & rottle anvil from Cylinder
(8). Now remove Needles (5) from Needle
Supporter (6).
e. Unscrew the Rear Plug (18) with Rear
Washer (17) & Piston (16) from Cylinder
(8). Now remove Cylinder Lock Pin (9)
from Housing (12). Replace the worn-out/
damaged parts with new one.
f. Remove Cylinder (8) from Housing (12).
g. Remove Front Washer (10) from Cylinder
(10) and replace it with new one. (If found
damaged)
h. Now remove O-ring (11) from Housing
(12) and replace it with new one.
i. Now remove Lever Pin (20) from rottle
lever (19) to remove rottle lever (19)
from Housing (12) and replace it with new
one. (If found damaged)
j. Unscrew Valve Cap (15) with Valve
Packing (14) from Housing (12). Now
remove rottle Valve Assembly (13) from
Housing (12) and replace with new ones. (If
found damaged/worn-out)
k. Coat parts with the recommended light oil
before re-assembling. Now follow the above
steps in reverse manner to reassemble the
Needle Scalers…

FF-MM-300-REV - 00
Page 10
Operation and Maintenance Guide Pneumatic Needle Scalers
Bill of Materials for N-24 / HN-24
Illustration
Number Part Number Description N 24
1 022 40 01 NEEDLE GUIDE 1
2 022 40 17 STOP RING 1
3 022 90 63 HEX. NUT 1
4 022 90 61 CLAMP BOLT 1
5 022 90 04OL NEEDLE (3mm X 180mm) 23
__ 022 90 08 NEEDLE (2mm x 180mm) 53
6 022 4045 NEEDLE SUPPORTER (3mm) 1
__ 022 40 47 NEEDLE SUPPORTER (2mm) 1
7 022 40 19 "THROTTLE ANVIL SCALER" 1
8 022 40 02 CYLINDER 1
9 022 90 23 CYLINDER LOCK PIN 1
10 022 40 05 "FRONT WASHER" 1
11 022 40 03 O' RING HOUSING 1
12 022 40 07 HOUSING 1
13 022 90 29A THROTTLE VALVE ASSEMBLY 1
14 022 90 27 VALVE PACKING 1
15 022 90 25 VALVE CAP 1
16 022 40 09 PISTON 1
17 022 40 11 "REAR WASHER" 1
18 022 40 13 REAR PLUG 1
19 022 90 31 THROTTLE LEVER 1
20 022 90 33 LEVER PIN 1
Standard Accessories
Part No Description Qty
022 40 52 HOSE NIPPLE ( FOR QC FITTING OF 30SH,30SM &
30SF) 1
Optional Accessories
Part No Description Qty
022 90 43 HOSE NIPPLE 1
022 90 41 REDUCER 1

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Operation and Maintenance Guide Pneumatic Needle Scalers
Exploded View for N-24 / HN-24
15
18
17
14
20
19
11
4
12
9
3
10
16
8
13
1
2
6
5
7

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Page 12
Operation and Maintenance Guide Pneumatic Needle Scalers
Diassembly and Re-assembly for SN 20ST
a. Shut o air supply and allow residual
Pressure to bleed o.
b. Remove Safety Band (5) from Stop Ring (1).
Now Unscrew Stop Ring (1) from Cylinder
(6) and replace it with new one. (If found
damaged/Worn-out)
c. Remove Needle Supporter (2) with Needles
(3), spring (20) & rottle Anvil (4) from
Cylinder (6). Now remove Needles (3)
from Needle Supporter (2).
d. Now unscrew the Control Body (11) from
Cylinder (6). Now remove Piston (7), Cover
for Cylinder (9) & Front Washer (8).
e. Remove O-ring (10) from Control Body
(11) and replace it with new one.
f. Remove internal Circlip (16) from Control
Body (11) using Circlip pliers. Now remove
Valve cap (14) with O-ring (15), spring (19)
and rottle valve (17) with O-ring (18)
from Control Body (11) and replace it with
new one. (If found damaged/Worn-out)
g. Now remove O-ring (15) from Valve Cap
(14) and O-ring (18) from rottle Valve
(17) and replace it with new one.
h. Remove Lever Pin (13) from Control Body
(11) & remove throttle Lever (12).
i. Coat parts with the recommended light oil
before re-assembling. Now follow the above
steps in reverse manner to reassemble the
Needle Scalers…

FF-MM-300-REV - 00
Page 13
Operation and Maintenance Guide Pneumatic Needle Scalers
Bill of Materials for SN 20ST
Illustration
Number Part Number Description SN 20 ST
1 140 21 01 STOP RING 1
2 140 21 02 NEEDLE SUPPORTER (3 MM) 1
3 022 90 04OL NEEDLE (Ø3 X 180) 12
4 140 21 03 THROTTLE ANVIL 1
5 140 51 12 SAFETY BAND 1
6 140 21 04 CYLINDER 1
7 140 21 05 PISTON 1
8 140 40 08 FRONT WASHER 1
9 140 40 09 COVER FOR CYLINDER 1
10 140 40 10 O' RING FOR CONTROL BODY 1
11 140 21 06 CONTROL BODY 1
12 022 90 31 THROTTLE LEVER 1
13 100 50 19 LEVER PIN 1
14 140 21 07 VALVE CAP 1
15 140 40 11 O' RING FOR VALVE CAP 1
16 140 90 13 INTERNAL CIRCLIP (LIGHT B-12) 1
17 022 90 29 THROTTLE VALVE 1
18 022 90 30 O' RING FOR THROTTLE VALVE 1
19 022 90 40 SPRING FOR THROTTLE VALVE 1
20 140 51 01 SPRING 1
Standard Accessories
Part No Description Qty
022 40 52 HOSE NIPPLE ( FOR QC FITTING OF 30SH,30SM &
30SF) 1
Optional Accessories
Part No Description Qty
022 90 43 HOSE NIPPLE 1
022 90 41 REDUCER 1

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Operation and Maintenance Guide Pneumatic Needle Scalers
Exploded View for SN 20ST
12
13
11
18
17
19
15
14
16
10
9
8
7
6
4
3
2
20
5
1

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Operation and Maintenance Guide Pneumatic Needle Scalers
Diassembly and Re-assembly for SN 16PG
a. Shut o air supply and allow residual
Pressure to bleed o.
b. Remove Safety Band (5) from Stop Ring (1).
Now Unscrew Stop Ring (1) from Cylinder
(6) and replace it with new one. (If found
damaged/Worn-out)
c. Remove Needle Supporter (2) with Needles
(3), spring (20) & rottle Anvil (4) from
Cylinder (6). Now remove Needles (3)
from Needle Supporter (2).
d. Now unscrew the Control Body (11) from
Cylinder (6). Now remove Piston (7), Cover
for Cylinder (9) & Front Washer (8).
e. Remove O-ring (10) from Control Body
(11) and replace it with new one.
f. Remove internal Circlip (16) from Control
Body (11) using Circlip pliers. Now remove
Valve cap (14) with O-ring (15), spring (19)
and rottle valve (17) with O-ring (18)
from Control Body (11) and replace it with
new one. (If found damaged/Worn-out)
g. Now remove O-ring (15) from Valve Cap
(14) and O-ring (18) from rottle Valve
(17) and replace it with new one.
h. Remove Lever Pin (13) from Control Body
(11) & remove throttle Lever (12).
i. Coat parts with the recommended light oil
before re-assembling. Now follow the above
steps in reverse manner to reassemble the
Needle Scalers…

FF-MM-300-REV - 00
Page 16
Operation and Maintenance Guide Pneumatic Needle Scalers
Exploded View for SN 16 PG
13
14
19
15
18
16
17
12
11
4
10
9
5
3
1
2
8
7
6

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Operation and Maintenance Guide Pneumatic Needle Scalers
Bill of Materials for SN 16 PG
Illustration
Number Part Number Description SN 16 PG
1 135 51 11OL NEEDLE (DIA 2 X 150) 29
2 135 21 06 NEEDLE SUPPORTER 1
3 135 21 02 THROTTLE ANVIL 1
4 135 21 03 PISTON 1
5 135 21 04 CYLINDER 1
6 135 21 05 STOP RING 1
7 135 40 08 O' RING 1
8 140 51 12 SAFETY BAND 1
9 135 10 01 HOUSING 1
10 135 40 09 O' RING FOR CYLINDER 1
11 135 40 10 REAR WASHER 1
12 135 21 07 REAR BOLT 1
13 022 90 25 VALVE CAP 1
14 022 90 27 VALVE PACKING 1
15 022 90 29 THROTTLE VALVE 1
16 022 90 31 THROTTLE LEVER 1
17 022 90 33 LEVER PIN 1
18 022 90 30 O' RING FOR THROTTLE VALVE 1
19 022 90 40 SPRING FOR THROTTLE VALVE 1
Standard Accessories
Part No Description Qty
022 40 52 HOSE NIPPLE ( FOR QC FITTING OF 30SH,30SM &
30SF) 1

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Operation and Maintenance Guide Pneumatic Needle Scalers
EU DECLARATION OF CONFORMITY
We hereby certify that the Listed Product stipulated below comply with all relevant provisions of the machinery direc-
tive (2006/42/EC) and the national laws and regulations adopting this directive.
Description :
Model Number :
Date :
Serial Number :
Is in conformity with the provisions of the following European Directives: (2006/42/EC) Machinery Safety and Har-
monized standards
ISO 12100-1: 2010: Safety of Machinery –general Principles for Design –Risk Assessment and Risk Reduction.
Registered Oce : 416 Gundecha Industrial Complex, Akuril Road,
Kandivali East, Mumbai – 400101, Maharashtra, India.
Web site : www.teryair.com
Works : A-1, Tirupati Udyog Nagar, Sativali Road, Vasai East,
Palghar – 401208, Maharashtra, India.
CE certication registration no – C E 16832
Issued by – BMQR Certications Pvt Ltd.
www.cemarking-india.com
Valid Till – 03/11/2021
Signed for and on behalf of
TERYAIR EQUIPMENT PVT. LTD. Place of Issue:
Date:

FF-MM-300-REV - 00
Page 19
Operation and Maintenance Guide Pneumatic Needle Scalers
Warranty Certificate
Every product manufactured by Teryair
is built to meet the highest standards of quality.
Teryair warrants that the Products, accessories and parts manufactured or supplied
by the company be free from defects in material and workmanship for a period of six
months from date of Teryair authorized dealer invoice to customer, or one year from
date of Teryair invoice to dealer, whichever is earlier. Failure due to normal wear,
misapplication, or abuse is, of course, excluded from this warranty.
Since the use of Teryair products and parts is beyond our control, Teryair cannot
guarantee the suitability of any product or part for a particular application and Teryair
shall not be liable for any consequential damage or expense arising from the use or
misuse of its products on any application. Teryair does not warranty bought out
products or components such as electric motors and hardware but will assist in
directing warranty queries to the dealer/manufacturer responsible. Teryair
responsibility is limited solely to replacement or repair of defective Teryair products
or components.
Dealer/End User shall have no right or remedy and Teryair shall have no liability or obligation under the warranty, if:
(i) a Product is altered, changed, modified or tampered with in any way, (ii) a Product is damaged after deposit with the
transporter for shipment; (iii) a Product is not properly preserved, packaged, stored, processed or handled after receipt; (iv) a
Product is not used and maintained in accordance with Teryair's recommended operating and maintenance manuals,
instructions and procedures, if any; (v) a Product is not properly incorporated or installed in, or not properly combined with, an
Other Product; (vi) the issue with a Product is directly or indirectly attributable to, or directly or indirectly results from or arises
out of, a failure, substandard performance or other issue with another product, material, component or part not supplied by
Teryair; (vii) the issue with a Product is directly or indirectly attributable to, or directly or indirectly results from or arises out of,
compliance with any design, specification or other specific requirement of Dealer/End User; (viii) a Product is used in a manner,
with a substance or for a purpose other than the normal manner, substance and purpose for which it is intended or is otherwise
subjected to abnormal use or service; (ix) a Product is subjected to a power surge, brown out or other similar occurrence; (x)
the issue with a Product is directly or indirectly attributable to, or directly or indirectly results from or arises out of, normal wear
and tear of such Product (including, without limitation, things such as worn seals, diaphragms, balls, O rings, gaskets, chisels,
cutters, hoses and other such wearing components; (xi) the issue with a Product is directly or indirectly.
Dated :
Product Model Number :
Product Serial Numbar : Ajay Bhagat, Q.A. Manager
(Company Seal)

FF-MM-300-REV - 00
Page 20
Operation and Maintenance Guide Pneumatic Needle Scalers
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