ATLAS COPCO STATIONARY AIR COMPRESSORS

KT-15 Aircooled

PARTS LIST

50250A102, October 2005

 Atlas Copco Stationary Air Compressors
KT-15 Aircooled

Parts List

• Copyright 2005, Atlas Copco Airpower n.v., Antwerp, Belgium.

Any unauthorized use or copying of the contents or any part thereof is prohibited.
This applies in particular to trademarks, model denominations, part numbers and drawings.

• Use only authorized parts. Any damage or malfunction caused by the use
of unauthorized parts is not covered by Warranty or Product Liability.

NO. 1310-3011-83
2005-10

www.atlascopco.com
TABLE OF CONTENTS INTRODUCTION
Serial Number Identification ................................. 2 This manual provides information for the Model KT-
15 reciprocating compressor, per Record of Change
Ordering Replacement Parts ................................ 2 102.
Atlas Copco Piston Fluid ...................................... 2
The Model KT-15 is an aircooled, two stage, four
Crankcase Lubricant Capacity ............................. 2 cylinder, V-type, splash lubricated compressor, with
Crankcase Group ................................................... 3 up to 175 PSI continuous pressure capability. It has
a 4.5" low pressure bore and a 2.5" high pressure bore,
Crankshaft Group .................................................. 4
with a 3.5" stroke. This compressor can be run at 600-
Connecting Rod & Piston Groups ..................... 5-8 1150 RPM.
Cylinder & Head Groups ................................. 9-16
Manifold Group .................................................... 17
Control Piping Schematics ................................. 18
Pilot Valves .......................................................... 19
Pilot Valve Repair Kit .......................................... 19
Differential Setting Charts .................................. 19
Suction Valve Unloader Assemblies .................. 20
Decals ................................................................... 20
Gasket Set ............................................................ 21
Recommended Spare Parts ................................ 21
Overhaul Kits ....................................................... 21
Head Kits .............................................................. 21
Typical Unit Repair Parts List ............................. 22

KT-15 Industrial
50250A102, October 2005 1
SERIAL NUMBER ATLAS COPCO
IDENTIFICATION KT PISTON
The unit serial number identification tag is located on COMPRESSOR FLUID
the air tank top plate. The basic compressor serial
Refer to the chart below to order Atlas Copco KT
number decal is located on the side of the crankcase
Piston Compressor Fluid from your local authorized
opposite the oil fill side. Fill in the numbers from your
Atlas Copco distributor.
compressor unit and basic compressor in the corre-
sponding spaces provided here, and reference this
page when ordering replacement parts. Fluid Type Ambient
Package Part No. Condition
KT-ISO 32
Unit Serial Number 1 Quart 2901-160900 0-32°F
1 Gallon 2901-161000 0-32°F

Basic Serial Number KT-ISO 68

1 Quart 2901-161100 32-80°F
1 Gallon 2901-161200 32-80°F

All replacement parts are to be ordered through an KT-ISO 100

authorized Atlas Copco distributor. Insist on genuine 1 Quart 2901-161300 60-104°F
Atlas Copco parts only! Failure to do so may void 1 Gallon 2901-161400 60-104°F
warranty.

ORDERING
REPLACEMENT PARTS CAUTION !
Prompt service can be rendered on repair parts orders Refer to the KT Industrial Series instruction manual for vital
if the following information is given: lubrication information.

Item 1) the model number & serial number.

Item 2) the exact part number needed. (Do not CAUTION !
order by item numbers.) Follow all safety precautions outlined in the KT Industrial
Item 3) the exact quantity needed. Series instruction manual.

Item 4) the preferred type of transportation.

WARNING !
Do not operate this compressor without a totally enclosed
belt guard or any other required safety equipment.

CRANKCASE LUBRICANT
CAPACITY DANGER !
Air used for breathing or food processing must meet OSHA
Model Capacity 1910.134 or FDA 21 CFR 178.3570 regulations. Failure to do
so may cause severe injury or death.
KT-15 33/4 qts.

KT-15 Industrial
50250A102, October 2005 2
CRANKCASE GROUP 111929-002

KT-15 Industrial
50250A102, October 2005 3
 CRANKSHAFT GROUP 111933

KT-15 Industrial
50250A102, October 2005 4
CONNECTING ROD & PISTON GROUP 111925-003
(low pressure, with dipper screw)

KT-15 Industrial
50250A102, October 2005 5
 CONNECTING ROD & PISTON GROUP 111925-005
(low pressure)

KT-15 Industrial
50250A102, October 2005 6
CONNECTING ROD & PISTON GROUP 111926-003
(high pressure, with dipper screw)

KT-15 Industrial
50250A102, October 2005 7
 CONNECTING ROD & PISTON GROUP 111926-005
(high pressure)

KT-15 Industrial
50250A102, October 2005 8
HEAD GROUP 111935-1
(*right bank / less head unloaders)

17 7
19
8
23

20 16
7 9

23

21
15

23
10 24
9 20
22

11

2 1
12.4 6
12.7

12.3
3.6 18
12.7
3.7

3.2 12.1
3.6

12.2
3.1 12.6 9

3.5 12.5
3.2
12.6 4

3.4
13
3.5 14
5

KT-15 Industrial
50250A102, October 2005 9
 HEAD GROUP 111935-1
(*right bank / less head unloaders)
Item Part
Number Qty. Number Description
1 1 111115-5 cylinder head, high pressure
2 1 111274-001 gasket, head to valve plate
3 1 111227X2 valve plate assembly, high pressure
3.1 1 111227-2 valve plate, (N.S.S.; order 111227X2)
3.2 2 112359-2 reed valve , (N.S.S.; order 111227X2)
3.3 1 112381-2 valve bumper (N.S.S.; order 111227X2)
3.4 1 112379 valve bumper (N.S.S.; order 111227X2)
3.5 2 112728-J12 flathead screw, 1/4-20 unc x 1.00, grade 8
3.6 2 112373-J02 hex. nut, 1/4-20 unc (@ 120 in.-lbs.)
4 1 112225-2 tube clamp
5 1 111228-004 gasket, cylinder to valve plate
6 1 110919-024 tube fitting, 90° male elbow, 3/4 tube x 3/4 npt
7 8 123478-L25 hex. screw, 3/8-16 unc x 4.00, grade 5 (@ 30 ft.-lbs.)
8 1 2392 pipe bushing, 1 npt x 3/4 npt
9 9 110428N038 flatwasher, 3/8
10 1 111118-4 cylinder head, low pressure
11 1 111229-001 gasket, head to valve plate
12 1 111226X2M valve plate assembly, low pressure
12.1 1 111226-2M valve plate (N.S.S.; order 112713M)
12.2 1 112380 reed valve (N.S.S.; order 112713M)
12.3 1 112359-1 reed valve (N.S.S.; order 112713M)
12.4 1 112381-1 valve bumper (N.S.S.; order 112713M)
12.5 1 112378-1 valve bumper (N.S.S.; order 112713M)
12.6 2 112728-J12 flathead screw, 1/4-20 unc x 1.00, grade 8
12.7 2 112373-J02 hex. nut, 1/4-20 unc (@ 120 in.-lbs.)
13 1 115037-L12 hex. screw, 3/8-16 unc x 1.00, grade 5 w/ sealant (@ 30 ft.-lbs.)
14 1 111228-003 gasket, cylinder to valve plate
15 1 23271 tube fitting, straight 3/4 tube x 3/4 npt
16 1 2961-100 safety valve
17 1 4816 pipe elbow, 3/4 npt
18 1 112130 intercooler (N.S.S.; order Intercooler Replacement Kit)
19 1 125936-009 pipe nipple, 3/4 npt x 1.88
20 3 112709-006 plug, 3/4-16 unf ("o"ring included)
21 1 112710-004 adapter, 3/4-16 unf x 1/4 npt ("o"ring included)
22 1 111550C100 air filter/silencer, hooded

Maintenance Parts
23 4 112708-908 "o"ring, silicone
24 1 110377E100 air filter element
1 112713M15 Valve Assembly Replacement Kit, LP
includes valve plate assembly & gaskets
1 112714 Valve Assembly Replacement Kit, HP
includes valve plate assembly & gaskets
1 112130K Intercooler Replacement Kit
includes intercooler and nut/sleeve fittings

*As viewed facing the compressor from the sheave side.

N.S.S. = Not Sold Separate
@ Indicates torque value (dry threads)
Note: Tighten all bolts & capscrews in any bolt pattern, evenly bringing each bolt to torque in equal increments, while moving about
the bolt pattern. This is particularly true of connecting rod & head bolts.

KT-15 Industrial
50250A102, October 2005 10
HEAD GROUP 111936-1
(*left bank / less head unloaders)

21

19 20
7 14
6 9 18

20

17

20
9 10
17

16
11
1
2 12.7 6
12.4

15
3.6
12.7 12.3
3.3

3.2 12.1
3.6

12.2
3.1 12.6 9

3.5 12.5
3.2 12.6
4

3.5 3.4 13
8
5

KT-15 Industrial
50250A102, October 2005 11
 HEAD GROUP 111936-1
(*left bank / less head unloaders)

Item Part
Number Qty. Number Description
1 1 111115-5 cylinder head, high pressure
2 1 111274-001 gasket, head to valve plate
3 1 111227X2 valve plate assembly, high pressure
3.1 1 111227-2 valve plate, (N.S.S.; order 111227X2)
3.2 2 112359-2 reed valve , (N.S.S.; order 111227X2)
3.3 1 112381-2 valve bumper (N.S.S.; order 111227X2)
3.4 1 112379 valve bumper (N.S.S.; order 111227X2)
3.5 2 112728-J12 flathead screw, 1/4-20 unc x 1.00, grade 8
3.6 2 112373-J02 hex. nut, 1/4-20 unc (@ 120 in.-lbs.)
4 1 112225-2 tube clamp
5 1 111228-004 gasket, cylinder to valve plate
6 2 110919-024 tube fitting, 90° male elbow, 3/4 tube x 3/4 npt
7 8 123478-L25 hex. screw, 3/8-16 unc x 4.00, grade 5 (@ 30 ft.-lbs.)
8 1 111228-003 gasket, cylinder to valve plate
9 9 110428N038 flatwasher, 3/8
10 1 111118-4 cylinder head, low pressure
11 1 111229-001 gasket, head to valve plate
12 1 111226X2M valve plate assembly, low pressure
12.1 1 111226-2M valve plate (N.S.S.; order 112713M)
12.2 1 112380 reed valve (N.S.S.; order 112713M)
12.3 1 112359-1 reed valve (N.S.S.; order 112713M)
12.4 1 112381-1 valve bumper (N.S.S.; order 112713M)
12.5 1 112378-1 valve bumper (N.S.S.; order 112713M)
12.6 2 112728-J12 flathead screw, 1/4-20 unc x 1.00, grade 8
12.7 2 112373-J02 hex. nut, 1/4-20 unc (@120 in.lbs.)
13 1 115037-L12 hex. screw, 3/8-16 unc x 1.00, grade 5 w/ sealant (@ 30 ft.-lbs.)
14 1 2961-100 safety valve
15 1 112129 intercooler (N.S.S.; order Intercooler Replacement Kit)
16 1 112825-002 pipe bushing, 1 npt x 3/4 npt
17 3 112709-006 plug, 3/4-16 unf ("o"ring included)
18 1 112710-004 adapter, 3/4-16 unf x 1/4 npt ("o"ring included)
19 1 111550C100 air filter/silencer, hooded

Maintenance Parts
20 4 112708-908 "o"ring, silicone
21 1 110377E100 air filter element
1 112713M15 Valve Assembly Replacement Kit, LP
includes valve plate assembly & gaskets
1 112714 Valve Assembly Replacement Kit, HP
includes valve plate assembly & gaskets
1 112129K Intercooler Replacement Kit
includes intercooler and nut/sleeve fittings

*As viewed facing the compressor from the sheave side.

N.S.S. = Not Sold Separate
@ Indicates torque value (dry threads)
Note: Tighten all bolts & capscrews in any bolt pattern, evenly bringing each bolt to torque in equal increments, while moving about
the bolt pattern. This is particularly true of connecting rod & head bolts.

KT-15 Industrial
50250A102, October 2005 12
HEAD GROUP 112037-1
(*right bank / with head unloaders)

13

18 7 25
27
19 28

23
9 26
7 22 14
4

20 23
24 10
23
9
30
21 4
29

23

11

6
2 1
12.4 12.7

12.7 15
3.6
12.3
3.3
12.1
3.2
3.6

12.6 9
3.1 12.2

3.5 12.5
3.2
12.6 16

3.4 17
3.5 8
5

KT-15 Industrial
50250A102, October 2005 13
 HEAD GROUP 112037-1
(*right bank / with head unloaders)
Item Part
Number Qty. Number Description
1 1 111115-5 cylinder head, high pressure
2 1 111274-001 gasket, head to valve plate
3 1 111227X2 valve plate assembly, high pressure
3.1 1 111227-2 valve plate, (N.S.S.; order 111227X2)
3.2 2 112359-2 reed valve , (N.S.S.; order 111227X2)
3.3 1 112381-2 valve bumper (N.S.S.; order 111227X2)
3.4 1 112379 valve bumper (N.S.S.; order 111227X2)
3.5 2 112728-J12 flathead screw, 1/4-20 unc x 1.00, grade 8
3.6 2 112373-J02 hex. nut, 1/4-20 unc (@ 120 in.-lbs.)
4 2 111591X1 unloader
5 1 111228-004 gasket, cylinder to valve plate
6 1 110919-024 tube fitting, 90° male elbow, 3/4 tube x 3/4 npt
7 8 123478-L25 hex. screw, 3/8-16 unc x 4.00, grade 5 (@ 30 ft.-lbs.)
8 1 111228-003 gasket, cylinder to valve plate
9 9 110428N038 flatwasher, 3/8
10 1 111118-4 cylinder head, low pressure
11 1 111229-001 gasket, head to valve plate
12 1 111226X2M valve plate assembly, low pressure
12.1 1 111226-2M valve plate (N.S.S.; order 112713M15)
12.2 1 112380 reed valve (N.S.S.; order 112713M15)
12.3 1 112359-1 reed valve (N.S.S.; order 112713M15)
12.4 1 112381-1 valve bumper (N.S.S.; order 112713M15)
12.5 1 112378-1 valve bumper (N.S.S.; order 112713M15)
12.6 2 112728-J12 flathead screw, 1/4-20 unc x 1.00, grade 8
12.7 2 112373-J02 hex. nut, 1/4-20 unc (@ 120 in.-lbs.)
13 1 4816 pipe elbow, 3/4 npt
14 1 2961-100 safety valve
15 1 112130 intercooler (N.S.S.; order Intercooler Replacement Kit)
16 1 112225-2 tube clamp
17 1 115037-L12 hex. screw, 3/8-16 unc x 1.00, grade 5 w/ sealant (@ 30 ft.-lbs.)
18 1 125936-009 pipe nipple, 3/4 npt x 1.88
19 1 2392 pipe bushing, 1 npt x 3/4 npt
20 1 23271 tube fitting, straight 3/4 tube x 3/4 npt
21 1 112709-006 plug, 3/4-16 unf ("o"ring included)
22 1 112710-004 adapter, 3/4-16 unf x 1/4 npt ("o"ring included)
23 2 112708-908 "o"ring, silicone
24 1 124351-004 tube fitting, male branch tee, 1/4 tube x 1/4 npt
25 1 110515-025 copper tube, 1/4 o.d.
26 1 2708 tube fitting, 90° male elbow, 1/4 tube x 1/4 npt
27 1 3003 pipe tee, 1/4 npt x 1/4 npt x 1/4 npt
28 1 110594-005 tube fitting, male connector, 1/4 tube x 1/4 npt
29 1 111550C100 air filter/silencer, hooded

Maintenance Parts
30 1 110377E100 air filter element
1 112713M15 Valve Assembly Replacement Kit, LP
includes valve plate assembly & gaskets
1 112714 Valve Assembly Replacement Kit, HP
includes valve plate assembly & gaskets
1 112130K Intercooler Replacement Kit
includes intercooler and nut/sleeve fittings
*As viewed facing the compressor from the sheave side.
N.S.S. = Not Sold Separate
@ Indicates torque value (dry threads)
Note: Tighten all bolts & capscrews in any bolt pattern, evenly bringing each bolt to torque in equal increments, while moving about
the bolt pattern. This is particularly true of connecting rod & head bolts.

KT-15 Industrial
50250A102, October 2005 14
HEAD GROUP 112038-1
(*left bank / with head unloaders)

7 22
24
27 25

26
20
6 9 23
19
7 14

4
18
20
9 20
21
10
4

20 11 17

1
12.7
12.4
2
6

3.6 12.7 12.3

15

3.3 12.1
3.6
3.2
3.1
12.2 9
12.6

3.2
3.5
12.5

12.6 16
3.5 8 13
3.4

KT-15 Industrial
50250A102, October 2005 15
 HEAD GROUP 112038-1
(*left bank / with head unloaders)
Item Part
Number Qty. Number Description
1 1 111115-5 cylinder head, high pressure
2 1 111274-001 gasket, head to valve plate
3 1 111227X2 valve plate assembly, high pressure
3.1 1 111227-2 valve plate, (N.S.S.; order 111227X2)
3.2 2 112359-2 reed valve , (N.S.S.; order 111227X2)
3.3 1 112381-2 valve bumper (N.S.S.; order 111227X2)
3.4 1 112379 valve bumper (N.S.S.; order 111227X2)
3.5 2 112728-J12 flathead screw, 1/4-20 unc x 1.00, grade 8
3.6 2 112373-J02 hex. nut, 1/4-20 unc (@ 120 in.-lbs.)
4 2 111591X1 unloader
5 1 111228-004 gasket, cylinder to valve plate
6 2 110919-024 tube fitting, 90° male elbow, 3/4 tube x 3/4 npt
7 8 123478-L25 hex. screw, 3/8-16 unc x 4.00, grade 5 (@ 30 ft.-lbs.)
8 1 111228-003 gasket, cylinder to valve plate
9 9 110428N038 flatwasher, 3/8
10 1 111118-4 cylinder head, low pressure
11 1 111229-001 gasket, head to valve plate
12 1 111226X2M valve plate assembly, low pressure
12.1 1 111226-2M valve plate (N.S.S.; order112713M15)
12.2 1 112380 reed valve (N.S.S.; order 112713M15)
12.3 1 112359-1 reed valve (N.S.S.; order 112713M15)
12.4 1 112381-1 valve bumper (N.S.S.; order 112713M15)
12.5 1 112378-1 valve bumper (N.S.S.; order 112713M15)
12.6 2 112728-J12 flathead screw, 1/4-20 unc x 1.00, grade 8
12.7 2 112373-J02 hex. nut, 1/4-20 unc (@ 120 in.-lbs.)
13 1 115037-L12 hex. screw, 3/8-16 unc x 1.00, grade 5 w/ sealant (@ 30 ft.-lbs.)
14 1 2961-100 safety valve
15 1 112129 intercooler (N.S.S.; order Intercooler Replacement Kit)
16 1 112225-2 tube clamp
17 1 112825-002 pipe bushing, 1 npt x 3/4 npt
18 1 112709-006 plug, 3/4-16 unf ("o"ring included)
19 1 112710-004 adapter, 3/4-16 unf x 1/4 npt ("o"ring included)
20 2 112708-908 "o"ring, silicone
21 1 124351-004 tube fitting, male branch tee, 1/4 tube x 1/4 npt
22 1ft 110515-025 copper tube, 1/4 o.d.
23 1 2708 tube fitting, 90° male elbow, 1/4 tube x 1/4 npt
24 1 3003 pipe tee, 1/4 npt x 1/4 npt x 1/4 npt
25 1 110594-005 tube fitting, 1/4 tube x 1/4 npt
26 1 111550C100 air filter/silencer, hooded

Maintenance Parts
27 1 110377E100 air filter element
1 112713M15 Valve Assembly Replacement Kit, LP
includes valve plate assembly & gaskets
1 112714 Valve Assembly Replacement Kit, HP
includes valve plate assembly & gaskets
1 112129K Intercooler Replacement Kit
includes intercooler and nut/sleeve fittings

*As viewed facing the compressor from the sheave side.

N.S.S. = Not Sold Separate
@ Indicates torque value (dry threads)
Note: Tighten all bolts & capscrews in any bolt pattern, evenly bringing each bolt to torque in equal increments, while moving about
the bolt pattern. This is particularly true of connecting rod & head bolts.

KT-15 Industrial
50250A102, October 2005 16
MANIFOLD GROUP 112257

Item Part
Number Qty. Number Description
1 1 110919-024 tube fitting, 90° male elbow, 3/4 tube x 3/4 npt
2 2ft 110515-075 copper tube, 3/4 OD
3 1 23271 tube fitting, straight 3/4 tube x 3/4 npt
4 1 122082 pipe tee, 1 npt x 3/4 npt x 3/4 npt
5 1 125936-001 pipe nipple, 3/4 npt x close
6 1 22238 pipe elbow, 45°, 1 npt
7 1 125937-001 pipe nipple, 1 npt x close

5
1 2
3

KT-15 Industrial
50250A102, October 2005 17
 CONTROL PIPING SCHEMATICS
SCHEMATICS

interstage

interstage

KT-15 Industrial
50250A102, October 2005 18
PILOT VAL
VALVES
ALVES

113321 series pilot valve 113320 series pilot valve

(continuous run operation) (dual control operation)

Available 113321 Series Pilot Valves Available 113320 Series Pilot Valves

Pilot Valve Pressure Setting Pilot Valve Pressure Setting

113321-090 80-90 113320-095 75-95

113321-100 90-100 113320-115 100-115
113321-110 100-110 113320-140 125-140
113321-125 110-125 113320-165 150-165
113321-140 130-140
113321-150 135-150
113321-165 150-165

WARNING !
Not all pilots are for use with all compressor systems. Make
sure that the pilot you order is set within the safe operating
limits of your compressor. Failure to heed this warning
could result in an explosion. Differential Setting Chart
Applies to 113320 & 113321 series pilot valves

Unload Min. Dif. Max. Dif.

(PSI) (PSI) (PSI)

Pilot Valve Repair Kit 113320K 40 2 5

Can be used to repair 113320 & 113321 series pilot valves 60 3 10
100 4 20
150 5 30
Qty. Part Description
175 5 45

1 ball
1 "o"ring
1 piston
1 diaphragm
1 pilot spring
1 piston spring
1 toggle lever
1 rivet
1 muffler
1 retaining ring

KT-15 Industrial
50250A102, October 2005 19
SUCTION VALVE Interstage Blowdown Valve
113320 & 113321 series pilot valves feature an
UNLOADER ASSEMBLIES interstage blowdown valve which bleeds interstage
pressure back to atmosphere when the compressor is
Description running unloaded. This reduces the unloaded horse-
The Atlas Copco suction valve unloader assembly power.
consists of unloading assemblies on the suction valves,
having a plunger to contact the suction valve reed and Installation
an unloader pilot valve (113320 or 113321 series) to The pilot valve is mounted directly into the air tank.
automatically regulate the passing of air tank pres- Compressors in the field, not equipped with these
sure to the unloading arrangement. controls, can be converted. Consult your local Atlas
Copco distributor for assistance with conversion pro-
Continuous Run Operation cedures.
Suction valve unloader assemblies are recommended
for use on Atlas Copco compressors where the com- Service
pressor is to run continuously and a constant pres- If a change in pilot valve operation is detected, re-
sure is to be maintained. The purpose is to automati- move the pilot valve from the air tank and check the
cally unseat the suction valve of the compressor when screen in the inlet of the pilot valve for obstructions.
the air supply is greater than the demand. Clean the screen if necessary.
Unloading occurs when air tank pressure is suffi-
Adjustment
cient to overcome pilot valve spring pressure. The
The unloading pressure is adjustable and is regulated
check ball is then unseated, allowing air tank pres-
by turning the unload adjustment hex nut (refer to
sure to pass to the unloader assemblies. The compres-
pilot valve illustrations). Turn the hex nut clockwise
sor will run unloaded until the air tank pressure
to increase and counterclockwise to decrease the
drops to a predetermined level. At this time, the
unloading pressure.
action of the ball is reversed, shutting off air tank
pressure to the unloader assemblies and venting the The differential (difference between unloading
unloader to atmosphere. This allows the compressor and loading pressure) is set by turning the differen-
to load. The drive runs continuously and must be tial adjustment hex nut (refer to pilot valve illustra-
started and stopped manually. 113321 series pilot tions). Increase the differential pressure by turning
valves feature a toggle lever which can be flipped to the hex nut clockwise - decrease by turning counter-
provide manual unloading. clockwise. Make all adjustments in small increments.
Tighten the locknuts after adjustment.
Dual Control Operation
Dual control operation is designed to provide a
choice between "start/stop" or "continuous run" op- DECALS
eration. The 113320 series pilot valve can be set for
"start/stop" operation by turning the knurled knob at
the end of the pilot valve (refer to illustration for
113320 series pilot valve) clockwise until it stops.
Under these circumstances, a pressure switch is re-
quired to stop the motor. Failure to use a pressure
switch, with the pilot valve locked out, will result in
unsafe conditions. 2

WARNING !
A pressure switch must be incorporated whenever 113320 1
series pilot valve is employed as part of the control system.
3

Decals
The compressor will operate in the continuous run
Item Part
mode if the knurled knob is turned counterclockwise # Qty. Description
Number
until it stops.
1 1 110831-001 serial number & nameplate
2 1 127889-A decal, CAUTION!, MANUAL
3 1 127889-B decal, DANGER!,"Air from this...."

KT-15 Industrial
50250A102, October 2005 20
 Overhaul Kit KQT15H

Item Part
# Qty. Number Description
2 115814 piston ring set
2 115815 piston ring set
1 112085 gasket set
2 111227X2 valve plate assembly, HP
2 111226X2M valve plate assembly, LP
2 110377E100 air filter, element
2 110190-052 piston pin assembly, LP
2 110190-053 piston pin assembly, HP
2 115590-001 connecting rod assembly
2 111927-003 connecting rod assembly
1 111333 breather filter
2 115564 dipper screw
2 110428N031 washer

Head Kit KQT15D

Item Part
# Qty. Number Description
2 112713M15 valve assembly kit, LP
2 112714 valve assembly kit, HP
2 110377E100 air filter element

Gasket Set 112085

Item Part
# Qty. Number Description
1 111781 oil seal
2 111274-001 gasket, head to valve plate
2 111229-001 gasket, head to valve plate
2 111228-003 gasket, cylinder to valve plate
2 111228-004 gasket, cylinder to valve plate
1 123157-167 "o"ring, 3/32 wide x 7.19 o.d.
1 123157-112 "o"ring, 3/32 wide x .69 o.d.
2 111782 gasket, cylinder to crankcase
8 112708-908 "o"ring, silicone

Recommended Spare Parts

Item Part
# Qty. Number Description
1 110377E100 air filter element
1 112085 gasket set
1 111226X2M valve plate assembly, LP
1 111227X2 valve plate assembly, HP

KT-15 Industrial
50250A102, October 2005 21
 TYPICAL UNIT REPAIR P
REPAIR AR
PAR TS LIST
ARTS
The parts listed here are for standard KT-15 units and may or may not be applicable to custom built units. Check with your local authorized
Atlas Copco distributor for parts that can be used for custom built units. Make sure the components you order are rated within the safe
operating limits of your system. If you are doubtful about which components to order, contact Atlas Copco or the local authorized
distributor.
(KT-15 horizontal tank - electric motor)

Part
Qty. Number Description

1 113272-200 tank
1 111136-050 tank drain valve
1 111136-100 service valve
1 110514-300 pressure gauge
1 110512-005 pressure switch
1 110513-200 pressure relief valve (in tank; 200 PSI)
1 2961-215 pressure relief valve (in discharge line; 215 PSI)
1 114800-100 check valve
6 ft. 110515-100 discharge tube
2 111265-100 ferrule/sleeve
1 112432K003 belt guard assembly
1 110258B098 drive belt
1 114610 motor pulley
1 8936 bushing
1 127466L042 15 h.p. motor, 230/460 V, 3 phase (ODP)

KT-15 Industrial
50250A102, October 2005 22
What sets Atlas copco apart? Our belief
that, to excel, we must provide the best
possible know-how and technology in ways
that our customers value. Whether we’re
fully supporting existing products or advanc-
ing technology through innovation, we
constantly focus on customer needs.

The Atlas Copco way of doing business

grows from ongoing interaction, long-term
relationships and a commitment to under-
standing each customer’s process and
objectives. As a result, every compressed
air solution we create helps a customer
operate with greater efficiency, economy
and productivity.

Satisfying customer needs effectively has

made Atlas Copco the number one com-
pressor manufacturer in the world. We will
continue to attract new business through
our unwavering conviction to creating
products and ideas that help our customers
succeed.