Speedaire 1WD36 Instructions for use

Form 5S5938 Printed in U.S.A. Ver. 04 03/11/2011
02571
0410/034/VCPVP
Operating Instructions & Parts Manual 1WD36, 1WD37, 1WD38, 1WD40, 1WD44
Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the product described.
Protect yourself and others by observing all safety information. Failure to comply with instructions could result in personal injury and/or
property damage! Retain instructions for future reference.
Speedaire®20, 25 & 30 HP
Two-Stage Air Compressors
Description
Speedaire compressors are two-stage splash lubricated heavy-duty industrial
units designed for 80%/ON 20%/OFF duty cycle. Maximum operating
pressure is 175 PSI. Each model is equipped with ASME air receiver, ASME
pressure relief valve, three phase electric motor and pressure switch for
start/stop control.
Simplex Horizontal
MODEL 1WD36
Specifications
Model HP Volts,
Phase
Amp
Draw
Free Air
CFM @
175 psi
Oil
Cap.
(Qts.)
Tank
Cap.
(Gal.)
Tank
Style *
Tank
Outlet
Maint.
Kit Pump
1WD36 20 230/460, 3 48/24 76.7 7 120 H 1 ¼ FNPT 1WF48 1WD30
1WD37 25 200/208
,
3 74/73 90.1 7 120 H 1 ¼ FNPT 1WF48 1WD30
1WD38 25 230/460, 3 62/31 90.1 7 120 H 1 ¼ FNPT 1WF48 1WD30
1WD40 25 230/460, 3 62/31 90.1 7 120 H 1 ¼
FNPT 1WF48 1WD30
1WD44 30 230/460, 3 72/36 101.0 7 120 H 1 ¼ FNPT 1WF48 1WD30
(*) H = Horizontal
C289-C
(Ref. Drawing)
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Speedaire
Operating Instructions & Parts Manual 1WD36, 1WD37, 1WD38, 1WD40, 1WD44
For Service and Warranty, Call: 1-888-303-1344
2
Speedaire ®20, 25 & 30 HP
Two-Stage Air Compressors
Table Of Contents
Subject Page
Safety and Operation Precautions........................................................................................................................... 3
Explanation of Safety Instruction Symbols and Decals ........................................................................................... 4
Installation ..........................................................................................................................................................5 & 6
Operation.................................................................................................................................................................. 7
Maintenance .......................................................................................................................................................8 & 9
Compressor Oil Specifications ................................................................................................................................ 10
Lubricant ................................................................................................................................................................. 10
Warranty ................................................................................................................................................................. 11
Toubleshooting Chart.....................................................................................................................................12 & 13
Repair Parts List.......................................................................................................................................... 14 thru 21
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Speedaire
Operating Instructions & Parts Manual
For Service and Warranty, Call: 1-888-303-1344
3
Models 1WD36, 1WD37, 1WD38,
1WD40, 1WD44
Safety And Operation
Precautions
Because an air compressor is a
piece of machinery with moving
and rotating parts, the same
precautions should be observed
as with any piece of machinery of
this type where carelessness in
operation or maintenance is
hazardous to personnel. In
addition to the many obvious
safety rules that should be
followed with this type of
machinery, the additional safety
precautions as listed below must
be observed:
1. Read all instructions
completely before operating
air compressor or unit.
2. For installation, follow all local
electrical and safety codes, as
well as the National Electrical
Code (NEC) and the
Occupational Safety and
Health Act (OSHA).
3. Electric motors must be
securely and adequately
grounded. This can be
accomplished by wiring with
a grounded, metal-clad
raceway system to the starter;
by using a separate wire
connected to the bare metal
of the motor frame; or other
suitable means.
4. Protect the power cable from
coming in contact with sharp
objects. Do not kink power
cable and never allow the
cable to come in contact with
oil, grease, hot surfaces, or
chemicals.
5. Make certain that the power
source conforms to the
requirements of your
equipment.
6. Pull main electrical disconnect
switch and disconnect any
separate control lines, if used,
before attempting to work or
perform maintenance on
the air compressor unit.
"Tag Out" or "Lock Out" all
power sources.
7. Do not attempt to remove
any compressor parts without
first relieving the entire
system of pressure.
8. Do not attempt to service any
part while machine is in an
operational mode.
9. Do not operate the
compressor at pressures in
excess of its rating.
Do not operate compressor at
speeds in excess of its rating.
10. Periodically check all safety
devices for proper operation.
Do not change pressure
setting or restrict operation
in any way.
12. Be sure no tools rags or
loose parts are left on the
compressor or drive parts.
13. Do not use flammable
solvents for cleaning the air
inlet filter or element and
other parts.
14. Exercise cleanliness during
maintenance and when
making repairs. Keep dirt
away from parts by covering
parts and exposed openings
with clean cloth or Kraft
paper.
15. Do not operate the
compressor without guards,
shields and screens in place.
This unit can start
automatically without
warning.
16. Do not install a shut-off valve
in the discharge line, unless a
pressure relief valve, of
proper design and size, is
installed in the line between
the compressor unit and
shut-off valve.
17. Do not operate compressor in
areas where there is a
possibility of ingesting
flammable or toxic fumes.
18. Be careful when touching the
exterior of a recently run
motor - it may be hot enough
to be painful or cause injury.
With modern motors this
condition is normal if
operated at rated load
modern motors are built to
operate at higher
temperatures.
19. Inspect unit daily to observe
and correct any unsafe
operating conditions found.
20. Do not "play around" with
compressed air, nor direct air
stream at body, because this
can cause injuries.
21. Compressed air from this
machine absolutely must not
be used for food processing
or breathing air without
adequate downstream filters,
purifiers and controls.
22. Always use an air pressure
regulating device at the point
of use, and do not use air
pressure greater than marked
maximum pressure of
attachments.
23. Check hoses for weak or
worn condition before each
use and make certain that all
connections are secure.
24. Always wear safety glasses
when using compressed air
gun.
The user of any air compressor
package manufactured by
Speedaire is hereby warned that
failure to follow the preceding
Safety and Operation Precautions
can result in injuries or
equipment damage. However,
Speedaire does not state as fact
or does not mean to imply that
the preceding list of Safety and
Operating Precautions is all
inclusive, and further that
the observance of this list will
prevent all injuries or equipment
damage.
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Speedaire
Operating Instructions & Parts Manual 1WD36, 1WD37, 1WD38, 1WD40, 1WD44
For Service and Warranty, Call: 1-888-303-1344
4
Speedaire®20, 25 & 30 HP
Two-Stage Air Compressors
Explanation Of Safety
Instruction Symbols And
Decals
Indicates
immediate hazards which
will result in severe injury
or death.
Indicates
hazards or unsafe practice
which could result in
severe injury or death.
Indicates
hazards or unsafe practice
which could result in
damage to the compressor
or minor injury
Observe, Understand
And Retain The
Information Given In
The Safety Precaution
Decals As Shown In The
Parts List Section.
This
reciprocating compressor
must not be used for
breathing air. To do so will
cause serious injury whether
air is supplied direct from the
compressor source or to
breathing tanks for later use.
Any and all liabilities for
damage or loss due to
injuries, death and/or
property damage including
consequential damages
stemming from the use of this
compressor to supply
breathing air will be
disclaimed by the
manufacturer.
The use of
this compressor as a booster
pump and/or to compress a
medium other than
atmospheric air is strictly
non-approved and can result
in equipment damage and/or
injury. Non-approved uses
will also void the warranty.
This unit
may be equipped with special
options which may not be
included in this manual. User
must read, understand and
retain all information sent
with special options.
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Speedaire
Operating Instructions & Parts Manual
For Service and Warranty, Call: 1-888-303-1344
5
Models 1WD36, 1WD37, 1WD38,
1WD40, 1WD44
Installation
Do not operate
unit if damaged during shipping,
handling or use. Operating unit
if damaged may result in injury.
1. Permanently installed
compressors must be located
in a clean, well ventilated dry
room so compressor receives
adequate supply of fresh,
clean, cool and dry air.
It is recommended that a
compressor, used for
painting, be located in a
separate room from that area
wherein body sanding and
painting is done. Abrasive
articles or paint, found to have
clogged the air intake filters
and intake valves, shall
automatically void warranty.
2. Compressors should never
be located so close to a wall or
other obstruction that flow of
air through the fan bladed
flywheel, which cools the
compressor, is impeded.
Permanently mounted units
should have flywheel at least
12" from wall.
3. Place stationary compressors
on firm level ground or flooring.
Permanent installations require
bolting to floor, and bolt holes
in tank or base feet are provided.
Before bolting or lagging
down, shim compressor level.
Avoid putting a stress on a
tank foot by pulling it tightly
down to floor. This will only
result in abnormal vibration,
and possible cracking of
Air Receiver. As an alternative,
install unit on optional
vibro-isolator pads. Tanks
bolted directly to a concrete
floor without padding will
not be warranted against
cracking.
Do not install
isolating valves between
compressor outlet and air
receiver. This will cause
excessive pressure if valve is
closed and cause injury and
equipment damage.
Always use an
air pressure regulating device
at the point of use. Failure to
do so can result in injury or
equipment damage.
• Do not install in an area where
ambient temperature is below
32 degrees F or above
100 degrees F.
• Do not install unit in an area
where air is dirty and/or
chemical laden.
• Unit is not to be installed
outdoors.
Electrical Power Supply
It is essential that the power
supply and the supply wiring are
adequately sized and that the voltage
correspond to the unit specifications.
Branch circuit protection must be
provided at installation as specified in
the National Electrical Code.
All wiring should be performed by
a licensed electrician or electrical
contractor. Wiring must meet
applicable codes for area of installation.
The table below gives recommended
wire sizes based on the 1999 NEC.
All models have a factory mounted and
wired magnetic starter. The starter
provides motor overload protection.
See Figure 1-1 for wiring diagram.
Electrical connections exist between
the pressure switch and the starter.
WIRE SIZE (AWG)
75° Copper Conductor - 30° Ambient
Three Phase
HP 208V 230V 460V
20 3 4 8
25 1 2 6
30 0 1 6
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Speedaire
Operating Instructions & Parts Manual 1WD36, 1WD37, 1WD38, 1WD40, 1WD44
For Service and Warranty, Call: 1-888-303-1344
6
Speedaire® 20, 25 & 30 HP
Two-Stage Air Compressors
Figure 1-1 Wiring Diagram
Wiring
must be such that when
viewing ompressor from
opposite shaft end, rotation
of shaft is clockwise as shown
by arrow on guard. Wrong
direction rotation for any
length of time will result in
damage to compressor.
Grounding Instructions
This product should be
connected to a grounded,
metallic, permanent wiring
system, or an equipment
grounding terminal or lead on
the product.
Air Line Piping
Connection to air system should
be of the same size, or larger,
than discharge pipe out of unit.
The table gives recommended
minimum pipe sizes. A union
connection to the unit and water
drop leg is recommended.
Install a flexible connector between
the discharge of the unit and the plant
air piping. Plant air piping should be
periodically inspected for leaks
using a soap and water solution for
detection on all pipe joints. Air
leaks waste energy and are expensive.
Never use plastic
pipe or improperly rated metal
pipe. Improper piping materials
can burst and cause injury or
property damage.
Minimum Pipe Sizes For Compressor Air Lines
(Based on Clean Smooth Schedule 40 Pipe)
CFM 25’ 50’ 100’ 200’ 300’
20 3/4” 3/4" 3/4" 1” 1”
40 3/4” 1” 1” 1” 1”
60 1” 1” 1 ¼ 1 ¼” 1 ¼”
100 1” 1 ¼” 1 ¼” 1 ½” 1 ½”
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304CAS546-A
(Ref. Drawing)

Speedaire
Operating Instructions & Parts Manual
For Service and Warranty, Call: 1-888-303-1344
7
Models 1WD36, 1WD37, 1WD38,
1WD40, 1WD44
Operation
This compressor has been inspected,
thoroughly tested and approved at
the factory. For this unit to give
long satisfactory service it must be
installed and operated properly.
This compressor has been designed
for a 80%/ ON – 20%/ OFF duty
cycle.
All models have a pressure switch
that senses changes in receiver
pressure and automatically starts
and stops the compressor at preset
pressure limits.
Initial Start Up
1. Pull main disconnect switch to
unit to assure that no power is
coming into the unit.
“Lock Out” or “Tag Out” switch.
Connect power leads to starter.
Do not
attempt to operate compressor
on voltage other than that
specified on order or on
motor.
2. Check compressor oil level.
Add oil as required. See
“Compressor Oil
Specifications” Section.
NOTE: Do not mix oil type,
weights or brands.
3. Inspect unit for any visible
signs of damage that would
have occurred in shipment or
during installation.
4. Activate main disconnect
switch.
5. "Jog" motor and check for
proper rotation by direction
arrow. If rotation is wrong,
reverse input connections on
the magnetic starter.
6. Close receiver outlet hand
valve and start.
7. With receiver hand valve
closed, let machine pump up
to operating pressure. At
this stage the automatic
controls will take over.
Check for proper cycling
operation.
8. Check for proper operation
of any options. Refer to
individual option
instruction sheet.
9. When the initial run period
has shown no operating
problems, shut unit down
and recheck oil level.
10 Open receiver hand valve.
The air compressor unit is
now ready for use.
This unit can
start automatically without
warning.
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Speedaire
Operating Instructions & Parts Manual 1WD36, 1WD37, 1WD38, 1WD40, 1WD44
For Service and Warranty, Call: 1-888-303-1344
8
Speedaire® 20, 25 & 30 HP
Two-Stage Air Compressors
Guide To Maintenance
For Service call 1-888-303-1344.
All requests should include model
number and serial number.
To obtain reliable and satisfactory
service, this unit requires a
consistent preventive
maintenance schedule.
Maintenance schedule forms are
included to aid in keeping the
proper records.
Before
performing any maintenance
function, switch main disconnect
switch to "off" position to
assure no power is entering unit
“Lock out” or “tag out” all
sources of power. Be sure all air
pressure in unit is relieved.
Failure to do this may result in
injury or equipment damage.
Daily Maintenance
1. Check oil level of compressor.
Add Speedaire recip
lubricant as required. See
“Compressor Oil
Specifications” Section. .
NOTE: Do not mix oil type,
weight, or brands.
2. Drain moisture from tank by
opening tank drain valve
located in bottom of tank. Do
not open drain valve if tank
pressure exceeds 25 PSIG.
3. Turn off compressor at the
end of each day's operation.
Turn off power supply at wall
switch.
Weekly Maintenance
1. Clean dust and foreign matter
from cylinder head, motor, fan
blade, air lines, intercooler
and tank.
2. Remove and clean intake air
filters.
Do not exceed
15 PSIG nozzle pressure when
cleaning element parts with
compressed air. Do not direct
compressed air against human
skin. Serious injury could
result. Never wash elements
in fuel oil, gasoline or
flammable solvent.
3. Check V-belts for tightness.
The V-belts must be tight
enough to transmit the
necessary power to the
compressor. Adjust the V-belts
as follows:
a. Remove bolts and
guard to access
compressor drive.
b. Loosen mounting
hardware which secures
motor to base. Slide
motor within slots of
base plate to desired
position.
c. Apply pressure with
finger to one belt at
midpoint span. Tension
is correct if top of belt
aligns with bottom of
adjacent belt. Make
further adjustments if
necessary.
d. Check the alignments of
pulleys. Adjust if
necessary.
e. Tighten mounting
hardware to secure
motor to base.
f. Re-install guard and
secure with bolts.
Never operate
unit without belt guard in place.
Removal will expose rotating
parts which can cause injury or
equipment damage.
Every 90 Days Or 500 Hours
Maintenance
1. Change crankcase oil. Use
only Speedaire
recip lubricant.
2. Check entire system for air
leakage around fittings,
connections, and gaskets,
using soap solution and brush
3. Tighten nuts and cap screws as
required.
4. Check and clean compressor
valves as required.Replace
worn or damaged parts.
Valves
must be replaced in original
positions. Valve gaskets
should be replaced each time
valves are serviced.
5. Pull ring on all pressure relief
valves to assure proper
operation.
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Speedaire
Operating Instructions & Parts Manual
For Service and Warranty, Call: 1-888-303-1344
9
Models 1WD36, 1WD37, 1WD38,
1WD40, 1WD44
Maintenance (Continued)
General Maintenance
Notes
Electric Motor:For service
refer to separate manual or chart
attached to equipment.
Pressure Relief Valve:The
pressure relief valve is an
automatic pop valve. Each valve
is properly adjusted for the
maximum pressure permitted by
tank specifications and working
pressure of the unit on which it is
installed. If it should pop, it will
be necessary to drain all the air
out of the tank in order to reseat
properly. Do not readjust.
Automatic Tank Drain:
( Models 1WD36, 1WD40,
and 1WD44) The automatic
tank drain is connected to the
bottom of the tank and drains
the condensation every time the
compressor stops. Exhausted air
from the centrifugal unloader
activates the tank drain.
Tank Drain Valve:Drain
valve is located at bottom of
tank. Open drain valve daily to
drain condensation. Do not open
drain valve if tank pressure
exceeds 25 PSIG. The automatic
tank drain equipped compressor
requires draining manually once a
week.
Pressure Switch:The
pressure switch is automatic and
will start compressor at the low
pressure and stop when the
maximum pressure is reached. It
is adjusted to start and stop
compressor at the proper
pressure for the unit on which it
is installed. Do not readjust.
Belts: Drive belts must be kept
tight enough to prevent slipping.
If belts slip or squeak, see V-belt
maintenance in preceding section.
If belts
are too tight, overload will be
put on motor and motor
bearings
Compressor Valves:
If compressor fails to pump air or
seems slow in filling up tank,
disconnect unit from power source
and remove valves and clean
thoroughly, using compressed air.
After cleaning exceptional care
must be taken that all parts are
replaced in exactly the same
position and all joints must be tight
or the compressor will not function
properly. When all valves are
reinstalled and connections tight,
close receiver outlet valve for final
test. Valve gaskets should be
replaced each time valve sets are
removed from pump.
Centrifugal Unloader And
Unloader Pressure Release
Valve: The centrifugal unloader
is operated by two governor
weights. It is totally enclosed and
lubricated from the crankcase of the
compressor. When compressor
starts, the governor weights
automatically open compressing the
main spring, allowing the unloader
pressure release valve to close.
When the compressor stops, the
main spring returns the governor
weights to normal position opening
the unloader pressure release valve
and unloading the compressor.
This prevents overloading the motor
when starting. If air continues to
escape through the governor or
unloader pressure release
valve while operating, this is an
indication the unloader pressure
release valve is not closing tightly
and may be held open by foreign
substance which has lodged on the
seat. In order to correct this, remove
the governor release valve cap, giving
access to unloader pressure release
valve spring and ball. Clean
thoroughly and return parts in the
same order in which they were
removed. Loose drive belts can also
cause unloader to leak by
preventing the compressor from
reaching proper speed.
(See “BELTS” above.)
Check Valve: The check valve
closes when the compressor stops
operating, preventing air from
flowing out of the tank through the
pressure release valve. After the
compressor stops operating, if air
continues to escape through the release
valve, it is an indication that the check
valve is leaking. This can be corrected
by removing check valve and cleaning
disc and seat. If check valve is worn
badly, replace check valve.
Before
removing check valve be sure
all air pressure in unit is
released and power is
disconnected. Failure to do so
may result in injury or
equipment damage.
The Interstage Pressure Relief
Valve is provided to protect against
interstage over pressure and is factory
set for maximum pressure of 75 PSIG.
Do Not Reset
If the pressure relief valve pops, it
indicates trouble. Shut down the unit
immediately and determine and correct
the malfunction. Serious damage can
result if not corrected and can lead to
complete destruction of the unit.
Tampering with the interstage pressure
relief valve, or plugging the opening
destroys the protection provided and
voids all warranty.
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Speedaire
Operating Instructions & Parts Manual 1WD36, 1WD37, 1WD38, 1WD40, 1WD44
For Service and Warranty, Call: 1-888-303-1344
10
Speedaire® 20, 25 & 30 HP
Two-Stage Air Compressors
Lubrication Of Compressor:
Fill crankcase to proper level as
indicated by oil sight gauge. Keep
crankcase filled as required by
usage. It is recommended that only
Speedaire recip lubricant be used.
This is a 30-weight, non-detergent
industrial oil with rust and
oxidation inhibitors specially
formulated for reciprocating
compressors. Do not mix oil types,
weights or brands.
Compressor Oil Specifications
Compressors are factory filled
with Speedaire hydrocarbon
based recip lubricant.
This is an ISO 100 non-detergent
industrial lubricant with rust
and oxidation inhibitors
specially formulated for
reciprocating compressors.
It is recommended this
compressor be maintained
using this oil for ambient
temperatures above 32 degrees F.
Speedaire synthetic is a premium
grade diester based synthetic
lubricant providing excellent
performance in high
temperature applications.
Do not
mix types, weights or brands.
Emulsification of
oil (white milky substance)
indicates unsafe accumulation of
moisture and may be evidence
compressor is oversized for
application. Failure to promptly
consult your local distributor, or
Speedaire Customer Service, can
be grounds to deny warranty.”
Note:
1. Normal break-in period of
Speedaire air compressors
is 25 hours.
2. For the first 100 hours of
compressor operation, a
careful and regular check of
the oil level should be made.
Maintain oil level at the full
line.
Changing To Synthetic
Lubricant
(Applies to diester based synthetic
lubricant only)
If changing to synthetic lubricant,
the following steps must be
completed.
1. Compressor must run for a
25 hour break-in period
using Speedaire ISO 100 oil.
2. Thoroughly drain existing oil
from crankcase.
3. Fill crankcase with a full
charge of synthetic
lubricant.
4. Run compressor for
200 hours.
5. Stop compressor and
thoroughly drain the
synthetic lubricant.
6. Add a full charge of
synthetic lubricant.
7. Compressor is now ready to
run for extended period
before next lubricant
change.
Lubricant
DESCRIPTION
PART
NUMBER
1 Quart Mineral
Lubricant 1WG50
1 Quart Synthetic 1WG49
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Speedaire
Operating Instructions & Parts Manual
For Service and Warranty, Call: 1-888-303-1344
11
Models 1WD36, 1WD37, 1WD38,
1WD40, 1WD44
LIMITED WARRANTY
DAYTON ONE-YEAR LIMITED WARRANTY. SPEEDAIRE® 20, 25 & 30 HP, MODELS COVERED IN THIS
MANUAL, ARE WARRANTED BY DAYTON ELECTRIC MFG. CO. (DAYTON) TO TITLE ORIGINAL USER
AGAINST DEFECTS IN WORKMANSHIP OR MATERIALS UNDER NORMAL USE FOR ONE YEAR AFTER DATE
OF PURCHASE. THE COMPRESSOR PUMP IS WARRANTED FOR THREE YEARS, EXCLUDING HEAD VALVES,
WHICH ARE WARRANTED FOR ONE YEAR. THIS WARRANTY APPLIES TO THE ORIGINAL PUMP ON A
COMPLETE COMPRESSOR UNIT. REPLACEMENT PUMPS ARE WARRANTED FOR THE BALANCE OF THE
THREE YEAR WARRANTY PERIOD, OR A MINIMUM OF ONE YEAR. AIR RECEIVER TANK IS ALSO
WARRANTED FOR THREE YEARS, PROVIDED THE UNIT IS PROPERLY INSTALLED ON SPEEDAIRE® VIBRO-
ISOLATOR PADS. ANY PART WHICH IS DETERMINED TO BE DEFECTIVE IN MATERIAL OR WORKMANSHIP
AND RETURNED TO AN AUTHORIZED SERVICE LOCATION. AS DA YTON DESIGNATES, SHIPPING COSTS
PREPAID, WILL BE, AS THE EXCLUSIVE REMEDY, REPAIRED OR REPLACED AT DAYTON’S OPTION. FOR
LIMITED WARRANTY CLAIM PROCEDURES, SEE “PROMPT DISPOSITION” BELOW THIS LIMITED
WARRANTY GIVES PURCHASERS SPECIFIC LEGAL RIGHTS WHICH VARY FROM JURISDICTION TO
JURISDICTION.
LIMITATION OF LIABILITY. TO THE EXTENT ALLOWABLE UNDER APPLICABLE LAW, DAYTON’S LIABILITY
FOR CONSEQUENTIAL AND INCIDENTAL DAMAGES IS EXPRESSLY DISCLAIMED. DAYTON’S LIABILITY IN
ALL EVENTS IS LIMITED TO AND SHALL NOT EXCEED THE PURCHASE PRICE PAID.
WARRANTY DISCLAIMER. A DILIGENT EFFORT HAS BEEN MADE TO PROVIDE PRODUCT INFORMATION
AND ILLUSTRATE THE PRODUCTS IN THIS LITERATURE ACCURATELY; HOWEVER, SUCH INFORMATION
AND ILLUSTRATIONS ARE FOR THE SOLE PURPOSE OF IDENTIFICATION, AND DO NOT EXPRESS OR IMPLY
A WARRANTY THAT THE PRODUCTS ARE MERCHANTABLE, OR FIT FOR A PARTICULAR PURPOSE, OR
THAT THE PRODUCTS WILL NECESSARILY CONFORM TO THE ILLUSTRATIONS OR DESCRIPTIONS. EXCEPT
AS PROVIDED BELOW, NO WARRANTY OR AFFIRMATION OF FACT, EXPRESSED OR IMPLIED, OTHER THAN
AS STATED IN THE ‘LIMITED WARRANTY” ABOVE IS MADE OR AUTHORIZED BY DAYTON.
Technical Advice, and Recommendations, Disclaimer. Notwithstanding any past practice or dealings or
trade custom, sales shall not include the furnishing of technical advice or assistance or system design.
Dayton assumes no obligations or liability on account of any unauthorized recommendations, opinions or
advice as to the choice, installation or use of products.
Product Suitability. Many jurisdictions have codes and regulations governing sales, construction,
installation, and/or use of products for certain purposes, which may vary from those in neighboring
areas. While attempts are made to assure that Dayton products comply with such codes, Dayton cannot
guarantee compliance, and cannot be responsible for how the product is installed or used. Before
purchase and use of a product, review the product applications, and all applicable national and local
codes and regulations, and be sure that the product, installation, and use will comply with them.
Certain aspects of disclaimers are not applicable to consumer products; e.g. (a) some jurisdictions do not
allow the exclusion or limitation of incidental or consequential damages, so the above limitation or
exclusion may not apply to you; (b) also, some jurisdictions do not allow a limitation on how long an
implied warranty lasts, consequently the above limitation may not apply to you; and (c) by law, during
the period of this Limited Warranty, any implied warranties of implied merchantability or fitness for a
particular purpose applicable to consumer products purchased by consumers, may not be excluded or
otherwise disclaimed.
Prompt Disposition. A good faith effort will be made for prompt correction or other adjustment with
respect to any product which proves to be defective within limited warranty. For any product believed to
be defective within limited warranty first write or call dealer from whom the product was purchased.
Dealer will give additional directions. If unable to resolve satisfactorily, write to Dayton at address
below, giving dealers name, address, date, and number of dealer’s invoice, and describing the nature of
the defect. Title and risk of loss pass to buyer on delivery to common carrier. If product was damaged in
transit to you, file claim with carrier.
Manufactured for Dayton Electric Mfg. Co., 5959 W. Howard St., Niles, Illinois 60714-4074 U.S.A.
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Speedaire
Operating Instructions & Parts Manual 1WD36, 1WD37, 1WD38, 1WD40, 1WD44
For Service and Warranty, Call: 1-888-303-1344
12
Speedaire® 20, 25 & 30 HP
Two-Stage Air Compressors
Always disconnect unit from power supply and relieve all pressure from air tank
before performing any maintenance. “Lock Out” or “Tag Out” all electric switches. Failure to do so may result in
equipment damage or injury.
Never operate compressor without belt guard in place.
Never use gasoline or flammable solvent on or around compressor unit. Explosion may result.
Troubleshooting Chart
Symptom Possible Cause(s) Corrective Action
Motor will not start 1. Main switch and fuses open
2. Starter heater coils open
3. Starter tripped
4. Defective pressure switch-
contacts will not close
5. Low voltage
1. Check all fuses and switches.
Check for loose or faulty wires
2. Check overload relay in starter.
Reset starter
3. Reset starter. If starter trips
repeatedly, have electrical system
inspected by an electrician
4. Repair or replace pressure switch
Warning – Relieve tank
pressure before servicing
5. Check with voltmeter. Be sure
voltage corresponds to unit
specifications
Starter trips repeatedly 1. Improperly adjusted pressure
switch
2. Faulty check valve
3. Incorrect fuse size or magnetic
starter heaters
4. Low voltage
5. Defective motor
1. Adjust or replace
Warning – Relieve tank
pressure before servicing
2. Clean or replace
Warning – Relieve tank
pressure before servicing
3. Be sure that fuses and heaters are
properly rated
4. Check with voltmeter. Be sure
voltage corresponds to unit
specifications
5. Replace motor
Tank pressure builds up slowly 1. Air leaks
2. Dirty air filter
3. Defective compressor valves
1. Tighten fittings
2. Clean or replace
3. Install new valve plate assembly
Tank pressure builds up quickly Excessive water in tank Drain tank
ASME pressure relief valve pops
off while compressor is running
1. Wrong pressure switch setting
2. Defective ASME relief valve 1. Adjust to correct setting
2. Replace valve
Warning – Relieve tank
pressure before servicing
Air leaking from centrifugal
unloader when unit is stopped
Check valve stuck in open position Replace check valve
Warning – Relieve tank
pressure before servicing
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Speedaire
Operating Instructions & Parts Manual
For Service and Warranty, Call: 1-888-303-1344
13
Models 1WD36, 1WD37, 1WD38,
1WD40, 1WD44
Troubleshooting Chart (cont’d)
Symptom Possible Cause(s) Corrective Action
Air leaking from centrifugal
unloader when unit is running
Centrifugal unloader release valve
dirty or defective
Clean or replace release valve.
Excessive belt wear 1. Pulling out of alignment
2. Belts too tight or too loose
1. Realign motor pulley
2. Adjust belt tension
Compressor runs hot 1. Improper flywheel rotation
2. Defective compressor valves
3. Dirty air filter
4. Dirty cylinder and/or intercooler
1. Check for correct rotation
(Counter clockwise when viewed
from drive side)
2. Install new valve plate assembly
3. Clean or replace
4. Clean cylinder fins and/or
intercooler
Interstage pressure relief valve
pops off Defective compressor valves Install new valves
Excessive oil consumption 1. Dirty air filter
2. Wrong oil viscosity
3. Oil leaks
4. Worn piston rings
5. Scored cylinder
1. Clean or replace
2. Refill with proper viscosity oil
3. Tighten bolts. Replace gaskets
4. Replace rings
5. Replace cylinder
Automatic tank drain fails
to drain condensate
1. Incorrect timer setting
2. Air leak in line from pressure
switch to tank drain
3. Defective pressure switch
1. Adjust timer screw
2. Check for leaks. Tighten for all
fittings
3. Repair or replace pressure switch
Warning – Relieve tank
pressure before servicing
Air leaking from automatic tank
drain timer screw
1. Defective pressure switch
2. Faulty check valve
1. Repair or replace pressure switch
Warning – Relieve tank
pressure before servicing
2. Clean or replace
Warning – Relieve tank
pressure before servicing
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Speedaire
Operating Instructions & Parts Manual 1WD36, 1WD37, 1WD38, 1WD40, 1WD44
For Service and Warranty, Call: 1-888-303-1344
14
For Repair Parts, Call 1-800-323-0620
24 hours a day – 365 days a year
REPAIR PARTS ILLUSTRATION
Models: 1WD36, 1WD37, 1WD38, 1WD40, 1WD44.
C287-E
(Ref. Drawing)
Please provide following information:
-Model number
-Serial number
-Part description and number as shown in parts list
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Speedaire
Operating Instructions & Parts Manual
For Service and Warranty, Call: 1-888-303-1344
15
Repair Parts List
Models
1WD36
,
1WD37
,
1WD38
,
1WD40
,
1WD44
Refer to repair parts illustration, page 16, and parts list, page 17, for additional parts
for Models 1WD36, 1WD40, 1WD 44
Ref. No. Description Part Number Qty.
1 Air compressor pump 1WD30 1
2 1/2-13 x 2" Hex head cap screw M3470 4
3 1/2-13 Flanged hex nut M3486 8
4 20 HP, 230/460 Volt, 3 Phase motor (1WD36) 2YB85 1
25 HP, 200 Volt, 3 Phase motor (1WD37) P04688A 1
25 HP, 230/460 Volt, 3 Phase motor (1WD38, 1WD40) 2YB78 1
30 HP, 230/460 Volt, 3 Phase motor (1WD44) 2YB75 1
5 1/2-13 x 1 ½" Hex head cap screw M3461 4
6 Not Used ----- --
7 Pulley (1WD36) P05634A 1
Pulley (1WD37, 1WD38, 1WD40) P09311B 1
Pulley (1WD44) P03710A 1
8 V Belt (1WD36, 1WD37, 1WD38, 1WD40) B100 3
V Belt (1WD44) B103 3
9 Belt guard bracket P14038B 3
10 5/16" Self tapping hex head screw M1454 6
11 Belt guard back CC1070858 1
12 5/16 Flat washer M3056 5
13 Belt guard front CC1070857 1
14 Belt guard clip P10005A 6
15 Belt guard bracket P14105B 1
16 7/16-14 x 2" Hex head cap screw P04779A 1
17 5/16" Self tapping hex head screw M1454 2
18 Not Used ----- --
19 5/16-18 Flanged hex nut M3485 2
20 Belt guard bracket P14106B 1
21 7/16-14 x 2" Hex head cap screw P04779A 1
22 Air receiver P03665D 1
23 1 ¼" x 2” schedule 80 pipe nipple P07985A 1
24 1 ¼" Ball valve M2688 1
25 Drain valve VP1022988 1
26 1/4" Close pipe nipple M1015B 1
27 1/4" Pipe plug 64AA5 2
28 300 PSI Pressure gauge M519C 1
29 Pressure switch P14202A 1
30 Check
valve P03590A 1
31 1 ¼“x 4" pipe nipple M1543 1
32 1 ¼" pipe union M1919 1
33 Starter, 20HP/230V/3PH (1WD36) VP1039764 1
Starter, 25HP/208V/3PH (1WD37) VP1039765 1
Starter, 25HP/230V/3PH (1WD38, 1WD40) VP1039766 1
Starter, 30HP/230V/3PH (1WD44) VP1043153 1
34 1/4-20 x 1" Hex head cap screw M3471 2
35 1/4-20 Flanged hex nut M3424 2
36 3/8”, 90 Conduit connector M1606 2
37 3/8" Flexible conduit CC1019312 2.5 FT.
38 1", Straight conduit connector (1WD36, 1WD38, 1WD40) M2369 1
1 ¼", Straight conduit connector (1WD37, 1WD44) P05046A 1
39 1", 90 Deg. Conduit connector (1WD36, 1WD38, 1WD40) P05042A 1
1 ¼", 90 Deg. Conduit connector (1WD37, 1WD44) P04510A 1
40 1" Flexible conduit (1WD36, 1WD38, 1WD40) M2463 1.75 FT.
1 ¼" Flexible conduit (1WD37, 1WD44) M2464 1.75 FT.
41 1 ¼” x 3-1/2” Pipe nipple M2222 1
42 Pressure relief valve M2843 1
43 1/2"x 1/4" Bushing M1318 1
44 1/4” x 90° Street elbow M980B 1
45 1/4" x 8” Pipe nipple M1020B 1
.
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Speedaire
Operating Instructions & Parts Manual 1WD36, 1WD37, 1WD38, 1WD40, 1WD44
For Service and Warranty, Call: 1-888-303-1344
16
For Repair Parts, Call 1-800-323-0620
24 hours a day – 365 days a year
REPAIR PARTS ILLUSTRATION
Models: 1WD36, 1WD40, & 1WD44
C303-K
(Ref. Drawing)
Please provide following information:
-Model number
-Serial number
-Part description and number as shown in parts list
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Speedaire
Operating Instructions & Parts Manual
For Service and Warranty, Call: 1-888-303-1344
17
For Repair Parts, Call 1-800-323-0620
24 hours a day – 365 days a year
Repair Parts List
Models 1WD36, 1WD40, 1WD44
Ref. No. Descri
p
tion Part Number Qt
y
.
1 Aftercooler P09954A 1
2 Aftercooler bracket P14107B 1
3 5/16" Self tapping hex head screw M1454 5
4 Aftercooler bracket P14104C 1
5 Not Used ----- --
6 5/16-18 Flan
g
ed hex nut M3485 2
7 Not Used ----- --
8 5/16” Flat washer M3056 2
9 5/16-18 Flanged hex nut M3485 2
10 Aftercooler guard P14123C 1
11 Belt
g
uard cli
p
P10005A 4
12 1", 90 Deg. street elbow M983A 2
13 1 x 1” NPT, Straight compression fitting P03591A 2
14 Upper discharge tube (includes compression fittings) Z12074 1
15 Aftercooler hose assembly Z6016 1
16 1", 90 De
g
.
p
i
p
e elbow M975B 1
17 1 x 5" Pipe nipple M2128 1
18 Pipe clamp P07529A 1
19 Pipe clamp bracket P10038A 1
20 1 ¼“ x 1” pipe reducing bushing M954B 1
21 Check valve P03590A 1
22 1 ¼” Close nipple M1039B 1
23 1 ¼” x 1”, 90 Deg. reducing pipe elbow M1999 1
24 Automatic tank drain VP1048249 1
25 5
/
16-18 x 7/8" Hex head cap screw M1454 2
26 5
/
16-18 Flan
g
ed hex nut M3485 2
27 1/4 x 1
/
4” NPT 90 Deg. compression fitting 86A40 2
28 1/4" OD Copper tube M2471 .5 FT.
29 1/4 x 1
/
8" NPT Straight compression fitting M2863 1
30 Automatic tank drain tube P10117A 5.1 FT.
31 1/4" Pi
p
e tee M1003B 1
32 Drain valve VP1022988 1
33 1/4 x
8" Pipe nipple M1020B 1
34 1/4", 90 Deg. Street elbow M980B 1
35 1/4 x 1-1/8” Pipe nipple P08798A 1
36 1/4 x 1/4“ NPT, Strai
g
ht com
p
ression fittin
g
M2862 2
37 Not Used ------------ --
38 1/4" Copper tube M2471 1.63 FT.
39 7/16-14 x 2" Hex head cap screw P04779A 1
40 Aftercooler bracket P14363B 1
41 Insert, tube P10118A 2
42 1”, 45 Deg. Street Elbow M2304 1
43 Tank Drain Bracket CC1049403 1
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-Model number
-Serial number
-Part description and number as shown in parts list

Speedaire
Operating Instructions & Parts Manual 1WD36, 1WD37, 1WD38, 1WD40, 1WD44
For Service and Warranty, Call: 1-888-303-1344
18
For Repair Parts, Call 1-800-323-0620
24 hours a day – 365 days a year
REPAIR PARTS ILLUSTRATION
Model: 1WD30
C308-B
(Ref. Drawing)
Please provide following information:
-Model number
-Serial number
-Part description and number as shown in parts list
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Speedaire
Operating Instructions & Parts Manual
For Service and Warranty, Call: 1-888-303-1344
19
For Repair Parts, Call 1-800-323-0620
24 hours a day – 365 days a year
Re
p
air Parts List
Com
p
ressor Pum
p
Model 1WD30
Ref. No. Description Part Number Qty.
1 Crankcase M1386 1
2 Pipe plug 64AA5 1
3 Oil level gauge RE714 1
4 Pipe nipple M492 1
5 Pipe cap M461 1
6 Pi
p
e
p
lu
g
64A5 1
7 Crankshaft R155 1
8 Main bearing Z6506 2
9 Oil seal P03433A 1
10 Bearing housing gasket set Z775 1
11 Bearin
g
housin
g
P12274C 1
12 Hex head cap screw M2345 8
13 Hex head cap screw M2597 2
14 Bearing housing cover gasket SE1489 1
15 Baffle plate P12391A 1
16 Governor wei
g
ht s
p
indle SE583B 1
17 Governor weight SE582 2
18 Governor weight pin SE592A 2
19 Lock washer M466 1
20 Not Used ----- --
21 Governor s
p
rin
g
s
p
acer M912A 1
22 Governor spring SE590 1
23 Governor spring sleeve SE587 1
24 Bearing housing cover RE10100A 1
25 Centrifugal unloader muffler Z4593 1
26 Hex head machine screw M3473 6
27 Release valve kit (items 28, 29, 30 &31) Z12414A 1
28 Release valve plunger SE586B 1
29 Release valve ball P07841A 1
30 Release valve spring SE591 1
31 Release valve ca
p
NR101 1
32 Flywheel P05723C 1
33 Key M1506 1
34 Flywheel washer M1394 1
35 Hex head cap screw M2265 1
36 Low
p
ressure connectin
g
rod assembl
y
(includes items 39,40 & 41) Z621 2
37 High pressure connecting rod assembly (includes items 38, 39,40 & 41) Z622 2
38 Oil dipper P03440A 2
39 Piston pin bearing P03430A 4
40 Connecting rod bolt P03458A 8
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-Model number
-Serial number
-Part description and number as shown in parts list

Speedaire
Operating Instructions & Parts Manual 1WD36, 1WD37, 1WD38, 1WD40, 1WD44
For Service and Warranty, Call: 1-888-303-1344
20
For Repair Parts, Call 1-800-323-0620
24 hours a day – 365 days a year
Repair Parts List
Compressor Pump Model 1WD30
Ref. No. Description Part Number Qty.
41 Connecting rod nut P03459A 8
42 Low pressure piston with pin ZM1906 2
43 Low pressure piston pin M1395 2
44 Piston pin retaing ring P03434A 8
45 Low pressure piston ring set Z9087 2
46 Hi
g
h
p
ressure
p
iston with
p
in ZM1393 2
47 High pressure piston pin M1383 2
48 High pressure piston ring set Z9088 2
49 Cylinder flange gasket M1391 2
50 Cylinder P05863D 2
51 Hex head ca
p
screw M2346 12
52 Low pressure intake valve assembly Z273 2
53 Low pressure valve gasket P07352A 6
54 Low pressure discharge valve assembly Z274 2
55 High pressure intake valve assembly Z784 2
56 Hi
g
h
p
ressure valve
g
asket P07353A 8
57 High pressure discharge valve assembly Z785 2
58 Low pressure intake manifold P09711D 2
59 Hex head cap screw P04779A 16
60 Low pressure discharge manifold M1423 2
61 Hi
g
h
p
ressure intake manifold M1431 2
62 High pressure discharge manifold M1508 2
63 Interstage pressure relief valve CC1009750 2
64 Intake filter P14133A 2
65 Intake filter element P05051A 2
Com
p
lete com
p
ressor
p
um
p
g
asket set (items 10,14,49) Z10889 1
Low pressure piston kit (items 42 & 45) Z9108 2
High pressure piston kit (items 46 & 48) Z9107 2
Complete compressor pump ring set (items 45 & 48) Z9123 1
Valve set with gaskets (items 52, 53, 54,55, 56 &57) Z614 1
Valve gasket kit (items 53 &56) Z615 1
Please provide following information:
-Model number
-Serial number
-Part description and number as shown in parts list
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