stellar labs 8P User manual

Model 8P
Single-Stage Piston
Compressor Manual
Stellar Industries Inc.
740 North State Street
PO Box 169
Garner, IA 50438
800-392-3015
www.stellarindustries.com
Subject to Change without Notication.
© 2023 Stellar Industries Inc.
Rev 1
PN 92579
Specications • Installation • Assembly

Page ii | Stellar Industries®8P Compressor Manual
Model 8P Manual Revisions
Date of Revision Section Revised Description of Revision
SERIAL NO.
DATE
MODEL
MADE IN THE USA
by the Employee Owners of Stellar Industries
PN 112060
PATENT / IP INFORMATION:
www.stellarindustries.com/ip

Stellar Industries®8P Compressor Manual | Page iii
Table of Contents
For Technical Questions, Information, Parts, or Warranty, Call Toll-Free at
800-321-3741
Hours: Monday - Friday, 8:00 a.m. - 5:00 p.m. CST
Or email at the following addresses:
Technical Questions, and Information: [email protected]
Order Parts: [email protected]
Warranty Information: [email protected]
Introduction.............................................................................................................................................. iv
Chapter 1 - Specications ..............................................................................................................................1
Chapter 2 - Installation ...................................................................................................................................3
Component Installation.............................................................................................................................3
Component Installation, continued ...........................................................................................................4
8P Electrical Schematic ............................................................................................................................5
Hydraulic System......................................................................................................................................6
Air System ................................................................................................................................................6
Compressor Pressure Switch ...................................................................................................................7
Typical Hydraulic Circuit for Single-Section Pump ...................................................................................8
Typical Hydraulic Circuit for Tandem (Two Part) Pump ...........................................................................9
Typical Hydraulic Circuit for Compressor with Auxiliary Cooler ..............................................................10
Chapter 3 - Assembly Drawings ...................................................................................................................11
8P Assembly - PN B0299 .......................................................................................................................11
SUH-21 Compressor Assembly..............................................................................................................13
Crankcase Group (Tapered Shaft)..........................................................................................................14
Crankcase Group (Straight Shaft) ..........................................................................................................15
Cylinder Group .......................................................................................................................................16
Head Group ............................................................................................................................................17
Head Options..........................................................................................................................................18
Optional Head Unloader - PN 23200......................................................................................................19
Flywheel Options ....................................................................................................................................20
Clutch Options ........................................................................................................................................21
Chapter 4 - Replacement Parts....................................................................................................................23

Page iv | Stellar Industries®8P Compressor Manual
Introduction
Stellar Industries®Air Compressors are designed to provide safe and dependable service for a
variety of operations. With proper use and maintenance, these air compressors will operate at
peak performance for many years.
To promote this longevity, carefully study the information contained in this manual before putting the
equipment into service. Though it is not intended to be a training manual for beginners, this manual
should provide solid guidelines for the safe and proper usage of the air compressor.
Once you feel comfortable with the material contained in this manual, strive to exercise your
knowledge as you safely operate and maintain the air compressor. This process is vital to the
proper use of the unit.
A few notes on this manual:
A copy of this manual is provided with every air compressor and can be found in the hard plastic
manual case that is installed on the chassis. A copy of this manual shall remain with the air
compressor at all times.
Throughout the manual, three signal words will be used to bring attention to important items:
A NOTICE signal word indicates a practice not related to physical injury.
A WARNING signal word indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
A DANGER signal word indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
Information contained within this manual does not cover all maintenance, operating, or repair
instructions pertinent to all possible situations. Please be aware that some sections of this manual
contain information pertaining to Stellar Industries®manufactured air compressors in general and
may or may not apply to your specic model.
This manual is not binding. Stellar Industries reserves the right to change, at any time, any or all
of the items, components, and parts deemed necessary for product improvement or commercial/
production purposes. This right is kept with no requirement or obligation for immediate mandatory
updating of this manual.
In closing:
If more information is required or technical assistance is needed, or if you feel that any part of this
manual is unclear or incorrect, please contact the Stellar Industries Customer Service Department by
phone at 800-392-3015 or email at [email protected].
WARNING
NOTICE
DANGER

Stellar Industries®8P Compressor Manual | Page 1
Chapter 1 - Specications
23.06
16.69
14.13
3.44
13.006.63
1.38
SLOT
.44X0.63
TYP 4
1.38
11.38
SPECIFICATIONS 8P
Hydraulic System 7 GPM @ 1800 PSI
Max Compressor Speed 1250 RPM
Hydraulic Operating Pressure 1800 PSI
Hydraulic Relief Pressure 2500 PSI
Max Working Pressure 150 PSI
Air Delivery (At Max Speed) 8 CFM @ 100 PSI
Weight (Hydraulic Driven Assm) 125 lbs.
Weight (Air Pump Only) 52 lbs.
Dimensions (Length) 23.06"
Dimensions (Width) 14.13"
Dimensions (Height) 16.69"
Electrical 12V DC
Crankcase Oil Capacity 16 Ounces
Cooler Fan 350 CFM, 12 Volt
(Pull)
Drive Type Direct Drive
Duty cycle on Piston Compressors is 50:50 over 10 minutes.
NOTICE

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Stellar Industries®8P Compressor Manual | Page 3
Component Installation
Chapter 2 - Installation
This section pertains to the installation of the air compressor, PTO, pump and other related items.
The instructions are intended as a guide to assist you with particular installation. These instructions
will provide only general information.
Compressor Torque Procedure
Head Assembly:
Torque Value: 34 ft-lbs
Procedure: Assemble head on the cylinder with head bolts started
only, not tight. Working in the pattern shown, torque three times,
increasing the torque each time as follows:
First Torque: 10 ft-lbs
Second Torque: 20 ft-lbs
Third Torque: 34 ft-lbs
After ve hours of use re-torque bolts to 34 ft-lbs.
Cylinder Assembly:
Torque Value: 20 ft-lbs
Procedure: After assembling cylinder over pistons and setting into place, tighten (6) cap screws
nger tight. In a criss-cross pattern, tighten bolts evenly so all bolts are hand snug. Again in a criss-
cross pattern torque each bolt to 20 ft-lbs, checking each bolt twice. After ve hours of use, re-
torque bolts to 20 ft-lbs.
Connecting Rod Control:
Torque Value: 18 ft-lbs
Procedure: Assemble rod onto the crankshaft taking care to align the machined surfaces together
and tighten cap screws nger tight. Tighten bolts until hand tight and torque to 18 ft-lbs. Check
twice the torque reading before nal assembly of the cylinders.
12
43
56

Page 4 | Stellar Industries®8P Compressor Manual
Component Installation, continued
Pump Assembly:
The pump assembly may either be installed directly on the PTO or as an optional
method, may be driven by a driveline from the PTO. Pump manufacturers provide specic
installation information for their products and should be consulted if questions arise. Note: A dual
or tandem hydraulic pump is recommended when additional hydraulically operated equipment are
added to the hydraulic system.
PTO Assembly:
Check with the PTO manufacturer’s representative for specic instructions regarding your particular
make, model, and year of vehicle. As some trucks may require modication of the transmission
cross member and the exhaust system, the manufacturer’s instructions should be followed to
ensure proper installation of the PTO.
Compressor Assembly:
Prepare the mounting location of the compressor by locating and drilling four (4) holes, 1/2”
diameter as per the mounting pattern of the air compressor base. Using four (4) 3/8” x 1.25 GR-5
cap screws, 3/8” at washer, and 3/8” nyloc nut, secure the compressor in place. The compressor
is air cooled, and must have a clean supply of cooling air to the fan with minimum restrictions.
Adequate space must be provided for proper circulation of air.
Electric Speed Control:
An optional electric or electronic speed control must be used to maintain proper operating speed of
the air compressor. The engine speed control will automatically increase from idle to preset speed
when engaged and decrease when disengaged.
POWER SUPPLY
(12V BATTERY HOT)
GROUND
CPRSR RELAY
(12V CONTROL INPUT)
SPEED CTRL
(12V CONTROL OUTPUT)
RED 12GA
GRN 14GA
YEL 14GA
BLK 12GA
CIRCUIT BREAKER
(STELLAR SUPPLIED)
BATTERY +
ELECTRICAL PIGTAIL
(STELLAR SUPPLIED)
*MINIMUM OPERATING VOLTAGE IS 11.6VDC*
CUSTOMER ADDED WIRING FOR POWER SUPPLY
AND GROUND CIRCUIT MUST BE SIZED TO ENSURE
SUFFICIENT VOLTA GE AT THE COMPRESSOR
DURING STARTUP AND OPERATION

Stellar Industries®8P Compressor Manual | Page 5
Electrical Connections:
Supplied with the compressor is a wire harness pigtail which has 4 leads coming o󰀨 of it. Connect
the black wire to the vehicle frame or other suitable ground. Connect the red lead to a fused power
source. Mount a single throw toggle switch in a convenient location and connect the green wire
from the compressor to this switch. Connect the other switch terminal to a fuse holder and then to
a 12V power supply. The yellow wire is required from the compressor when connecting the speed
control into the system.
8P Electrical Schematic
6Class 1 Compressor Owner’s Manual
Return Line
Pressure
Line
GND
CPRSR
SPD CTRL
PRESSURE
SWITCH
LINE
MOTOR
HYDRAULIC
MANIFOLD
C
OMPRESSOR (12V INPUT)
GROUND
SPEED CONTROL
C
B
A
C
B
A
SHD-21/8P Installation
Pump Assembly:
The pump assembly may either be installed directly
on the PTO or as an optional method, may be
driven by a driveline from the PTO. Pump
manufacturers provide specific installation
information for their products and should be
consulted if questions arise.
PTO Assembly:
Check with the PTO manufactures representative
for specific instructions regarding your particular
make, model, and year of vehicle. As some trucks
may require modification of the transmission cross
member and the exhaust system, the
manufacturer’s instructions should be followed to
insure proper installation of the PTO.
Compressor Assembly:
Prepare the mounting location of the compressor
by locating and drilling four (4) holes, 7/16”
diameter as per the mounting pattern of the air
compressor base. Using four (4) 3/8” x 1.25 GR-5
cap screws, 3/8” flat washers, and 3/8” nyloc nuts,
secure the compressor in place. The compressor is
air cooled, and must have a clean supply of
cooling air to the fan with minimum restrictions.
Adequate space must be provided for proper
circulation of air.
FAN
Electric speed control:
An optional electric or electronic speed control
must be used to maintain proper operating speed
of the air compressor. The engine speed control will
automatically increase from idle to preset speed
when engaged and decrease when disengaged.
The electric cable pull speed control (American
Eagle P/N 25740) is used on most gasoline engines.
The electronic speed controls are used only on Ford
7.3 and 6.0L diesel engines. Proper installation
instructions are provided with each system.
Hydraulic System:
The hydraulic system consists of the pump, oil
reservoir, filters and hoses. Installed on the
compressor is a valve block assembly that controls
the flow to the hydraulic motor. To this block, a 1/2”
high-pressure hose must be attached. This hose
comes from the hydraulic pumps pressure side. A
3/4” minimum low-pressure return line is connected
to the oil cooler outlet and is routed to the oil
reservoir. American Eagle recommends a sufficient
sized reservoir be provided which includes the
proper suction and return filters. The cooler on the
compressor is designed and sized to cool the air
compressor efficiently. An auxiliary oil cooler is
required when additional hydraulically operated
equipment are added to the hydraulic system.
Pressure on the return line exceeding 200 PSI can
and will cause damage to the filter, cooler, and
components of the compressor hydraulic system.

Page 6 | Stellar Industries®8P Compressor Manual
HYDRAULIC PRESSURE
-8 SAE PORT
HYDRAULIC RETURN
-12 MALE JIC
AIR DISCHARGE
-12 FEMALE NPT
The hydraulic system consists of the oil reservoir, pump, manifold, motor, lters, and hoses. A
½” 3000psi pressure line should be connected to the pressure line tting on the bulkhead. This
line is plumbed though an internal manifold block, and then to the motor. After the motor there is
an internal cooler which the oil passes through before going to the return line bulkhead tting. A
¾” minimum low-pressure return line is to connect to the return bulkhead tting and lter before
being returned to the oil reservoir. Stellar Industries recommends a su󰀩ciently-sized reservoir
be provided that includes the proper suction and return lters. The cooler on the compressor is
designed and sized to cool the air compressor e󰀩ciently. An auxiliary oil cooler is required when
additional hydraulically operated equipment is added to the hydraulic system. Pressure on the
return line exceeding 200PSI can and will cause damage to the lter, cooler, and components of the
compressor’s hydraulic system.
The airline is routed using a ¾” 200 psi air/steam hose. This delivery line should be free from all
obstructions. Note: There should be no check valve installed between the compressor and the
air tank (One is already included in the compressor package). Stellar Industries recommends the
installation of a ten-gallon air tank (minimum) to maintain proper operation of the air compressor.
Hydraulic System
Air System