BE AC708RB User manual

Wheeled Air
Compressor
User Manual
WARNING: This product can expose you to
chemicals including lead, which is known to the
State of California to cause cancer and birth
defects or other reproductive harm. For more
information, go to www.P65Warnings.ca.gov.
Wash hands after handling.

3
table of contents
Introduction
5 Using the Operators Manual
Product Identification
6 Record Identification Numbers
Safety
7 Safety Instructions
8 Safety Rules
8 Hazard Symbols and Meanings
11 General Safety Information
Safety & Installation
12 Spraying Precautions
12 Hose Precautions
12 Installation and Location
12 Extension Cords
Assembly Instructions
13 Assembly
Product Features
14 Automatic ON/OFF
14 Regulator
14 Tank Pressure Gauge
14 Safety Valve
14 Tank Drain Fitting
14 Safety Guard

4
table of contents
Operating Instructions
15 Initial Start Up
15 Start Up
15 Storage
15 Shut Down
Maintenance
16 When performing maintenance or service
16 Daily
16 Weekly
16 Monthly
16 Six Months or 250 Operating Hours
16 Oil Change
Troubleshooting
17 Troubleshooting Chart
Parts
18 AC708RB/AC6508HB Pump Diagram
19 Pump List
20 AC908HB Pump Diagram
21 Pump List
Warranty
22 Warranty

5
Using the Operator’s manual
This manual gives information with respect to operation and main-
tenance of the Compressor. Be sure to read it carefully first before
operation.
Following the manual can ensure the user’s safety and get the best
results from the compressor. All information and diagrams in this
manual are in accordance with the newest products at the publishing
time.
We strive for accuracy and this manual is accurate for the models de-
scribed at the time of printing. We reserve the right to make improve-
ments or changes at any time without notice or obligation.
Please keep this manual with the engine permanently, even if the
engine ownership is transferred.
Attention: Read through the complete
manual prior to the initial use of your com-
pressor.
introduction

6
product identification
Record Identification Numbers
If you need to contact an Authorized Dealer or Customer Service line
(1-866-850-6662) for information on servicing, always provide the
product model and identification numbers.
You will need to locate the model and serial number for the machine
and record the information in the places provided below.
Date of Purchase:
Dealer Name:
Dealer Phone:
Product Identification Numbers
Model Number:
Serial Number:

7
safety
Safety Instructions
· Carefully read through the entire owners manual before operating
this compressor.
· Keep manual with important records for safety instructions, operat-
ing procedures and warranty.
· After unpacking your new air compressor, please inspect it carefully
for any damage that may have occurred during transit.
· Do not operate this air compressor if damaged during shipment,
handling or misuse.
· Damage may result in bursting, which can cause serious injury or
property damage.
· All damaged parts must be repaired or replaced as needed prior to
operating this air compressor.
· Check to see that all nuts, bolts and fittings are secure.
· Check to see that the proper lubrication oil, which has been included
with the air compressor, is used to fill the compressor crankcase to
the proper level.
· Please contact our customer service department at the numbers
listed on the back of this instruction manual for any questions or
comments regarding this air compressor.

8
The safety alert symbol ( ) is used with a signal word (DANGER,
CAUTION, WARNING), a pictorial and/or a safety message to alert
you to hazards.
DANGER indicates a hazard which, if not avoided, will result in
death or serious injury.
WARNING indicates a hazard which, if not avoided, could result in
death or serious injury.
CAUTION indicates a hazard which, if not avoided, might result in
minor or moderate injury.
NOTICE indicates a situation that could result in equipment dam-
age.
Follow safety messages to avoid or reduce the risk of injury or
death.
HAZARD SYMBOLS AND MEANINGS
Save these Instructions
SAFETY RULES
safety
This is the safety alert symbol. It is used to alert
you to potential personal injury hazards. Obey
all safety messages that follow this symbol to
avoid possible injury or death.
explosion
kickback
fall fluid injection moving parts read manual
hot surface wear eye
protection
slippery
fire electric shock toxic fumes

9
safety
WARNING
AIR TANK WARNING: Drain liquid from air tank daily,
or after each use, using the drain valve located on
the bottom of the lower air tank. Failure to properly
drain liquid from the tank will cause rust from mois-
ture buildup, which weakens the tank and could lead
to a violent tank explosion, Periodically inspect the
tanks for unsafe conditions such as corrosion.
Never attempt to repair or make modifications to the tank or its at-
tachments. Welding, drilling or any other modifications may weaken
the tank, which may result in damage from rupture or explosion.
Never remove or attempt to adjust the pressure switch, safety
valve, or other factory set operating pressures.
WARNING
FIRE WARNING: Avoid dangerous environments. Do
not use compressor near gasoline or other flamma-
ble materials. Keep work area well lit. Normal spark-
ing of a motor or sparking from grinding metal could
ignite fumes. Do not spray flammable materials in the
vicinity of an open flame or other ignition source, in-
cluding the air compressor itself. Do not direct paint
or other spray material towards the compressor.
Read and follow all safely instructions for the material you are
spraying. Be sure to use an approved respirator designed for use
with your specific application.
WARNING
BREATHABLE AIR WARNING: This air compres-
sor in not designed, nor intended for the supply of
breathable quality air. Air produced by this unit may
contain carbon monoxide or other toxic vapors.
Do not inhale air from the compressor or from a breathing device
connected to it.

10
safety
WARNING
AIR TOOLS AND ACCESSORIES WARNING: Do not
exceed the pressure rating of any air tools, spray
guns, air accessories, or inflatables. Excess pressure
can cause them to explode, resulting in serious injury.
Follow the manufacturers recommended pressure
settings for all air tools and air accessories.
WARNING
Do not direct compressed air stream at people or
pets. The powerful compressed air stream can dam-
age exposed skin and easily propel loose dirt and
other small objects. Always wear eye protection that
meets ANSI Z28.1 specifications.
WARNING
Keep hands and fingers away from exposed metal
parts on a running air compressor. Air compressors
generate significant heat during normal operation,
which can cause serious burns. The compressor will
remain hot for some time after operation and should
not be touched or moved until cool.

11
safety
GENERAL SAFETY INFORMATION
Do not operate unit if damaged during shipping, handling or use.
Damage may result in bursting and cause injury or property damage.
Since the air compressor and other components (filters, lubricators,
hoses, etc.) used, make up a high pressure pumping system, the
following safety precautions must be observed at all times:
1. Read all manuals included with this product carefully. Be thor-
oughly familiar with the controls and the proper use of the
equipment.
2. Follow all local electrical and safety codes
3. Only persons well acquainted with these rules of safe operation
should be allowed to use the compressor.
4. Keep visitors away and NEVER allow children in the work area.
5. Wear safety glasses and use hearing protection when operating
the pump or unit.
6. Do not stand on or use the pump or unit as a handhold.
7. Before each use, inspect compressed air system and electrical
components for signs of damage, deterioration, weakness or leak-
age. Repair or replace defective items before using.
WARNING
Compressor parts may be hot even if the unit is
stopped.
8. Check all fasteners at frequent intervals for proper tightness.
9. Keep fingers away from a running compressor; fast moving and
hot parts will cause injury and/or burns.
10. If the equipment should start to abnormally vibrate, STOP the
engine/motor and check immediately for the cause. Vibration is
generally a warning of trouble.
11. To reduce fire hazard, keep engine/motor exterior free of oil,
solvent, or excessive grease. Never remove or attempt to adjust
safety valve. Keep safety valve free from paint and other accumu-
lations.
12. Never attempt to repair or modify a tank! Welding, drilling or any
other modification will weaken the tank resulting in damage from
rupture or explosion. Always replace worn or damaged tanks.
Drain liquid from tank daily.
13. Tanks rust from moisture build-up, which weakens the tank. Make
sure to drain tank daily and inspect periodically for unsafe condi-
tions such as rust formation and corrosion.
14. Fast moving air will stir up dust and debris which may be harmful.

12
safety & installation
WARNING
Do not spray flammable materials in vicinity of open
flame or near ignition sources including the compres-
sor unit.
Release air slowly when draining moisture or depressurizing the
compressor system.
SPRAYING PRECAUTIONS
15. Do not smoke when spraying paint, insecticides, or other flam-
mable substances.
16. Use a face mask/respirator when spraying and spray in a well
ventilated area to prevent health and fire hazards.
17. Do not direct paint or other sprayed material at the compressor.
Locate compressor as far away from the spraying area as possible
to minimize overspray accumulation on the compressor.
18. When spraying or cleaning with solvents or toxic chemicals, fol-
low the instructions provided by the chemical manufacturer.
HOSE PRECAUTIONS
19. Inspect hose before use. Do not exceed working pressure marked
on hose. Do not twist, bend knot, or abrade hose. Do not wrap
hose around body.
20. Keep away from hot surfaces and chemicals.
Installation
INSTALLATION AND LOCATION
The compressor must be used on a stable level surface. The air
compressor must be used in a clean and well-ventilated area.
The compressor requires an unobstructed airflow and must be
located a minimum of 18 inches from any walls or other ob-
structions.
Extension Cord Length Wire Size (A.W.C.)
Up to 25 Feet 14
26 to 50 Feet 12
51 to 100 Feet 10

13
assembly instructions
WARNING
The compressor is shipped without oil in the crank-
case. Add oil as indicated below.
Assembly
Read all safety instructions before using air compressor.
1. After opening the carton, please remove all parts and check against
photograph on carton. If any parts are missing, please call 1-866-850-
6662.
2. Place air compressor on a flat, level surface.
3. Pour supplied oil into crankcase until the oil level reaches the red dot
in the oil level sight glass. Be careful not to overfill.
Refill Oil
Immediately
Check Oil
Level Daily
Oil Level OK
NOTICE
Do not operate the compressor without lubricant or with low
lubricant level. We are not responsible for damage caused to the
compressor due to operation without proper lubrication.
4. Adjust tension of belt to ensure that a maximum of 1/2” / 12mm of
slack exists when pressure is placed on belt at centre line.
5. NOTE: If the belt is installed too tightly, overloading of the motor will
occur. This will cause the motor to overheat. If the belt is installed
too loosely, it will slip and unstable operation and vibration will oc-
cur. Caution - The rotating direction for the flywheel must follow the
arrow shown on the belt guard.
6. Close tank drain valve on the bottom of the air tank by turning the
valve clockwise until fully closed.
7. Attach the air coupler to the compressor regulator valve. Use Teflon
thread-sealing tape on the threads to make sure you have an airtight
connection. Do not over tighten fittings.
8. Attach the supplied air filter to the air intake port on the pump head.
9. Attach air hose and any desired air accessories (which are not in-
cluded). Use Teflon thread-sealing tape on the threads to make sure
you have an airtight connection. Do not over-tighten fittings.
1/2”

14
Product Features
1. Automatic ON/OFF Pressure Switch
The compressor is equipped with an automatic on/o pressure
switch. The compressor will only run when the switch is in the
“I”(ON) position. Once the tank has reached the desired preset
pressure (see Operation Instructions), the pump will automatically
shut o. While the switch is in the “I”(ON) position, the pump will
automatically turn back on once the pressure in the tank drops
below the minimum preset pressure. Do not leave the compressor
unattended while the power switch is in the “I”(ON) position.
2. Regulator
The regulator allows you to select the amount of air pressure that
is output through the air hose into tools and accessories. Refer to
the air delivery requirements of your tools for the proper pressure
settings.
3. Tank Pressure Gauge
The tank pressure gauge provides a reading of the air pressure
inside of the compressor tank.
4. Safety Valve
This compressor is equipped with a safely valve switch that will
engage when the pressure in the tank exceeds the maximum rated
pressure. DO NOT attempt to modify or remove safely valve.
5. Tank Drain Fitting
Water is produced whenever air is compressed. It is critical to drain
water from the air tank on this compressor frequently. If unit is used
only occasionally, tank should be drained after each use and prior
to the next use. To drain the tank, slowly open the tank drain fitting
by turning clockwise. Once all water has drained out, close the fit-
ting securely. NOTE: tank will not pressurize while fitting is open.
6. Safety Guard
The belt drive mechanism is protected by a metal guard. Do not
attempt to modify or remove this safety guard.
product features

15
operation
Operating Instructions
Initial Start Up
1. Disconnect tools and/or accessories from the air hose.
2. Open the tank drain valve to allow air to escape preventing air pressure
buildup in the air tank.
3. Check to see that the belt is installed properly with the correct tension.
4. Plug power supply cord into proper power source receptacle. (See
Grounding Instructions)
5. Run the compressor for a minimum or twenty minutes in this no-load
position to lubricate the bearings and piston.
6. Turn o compressor, drain liquid from tanks and close drain valve.
7. The compressor is now ready for use.
Start Up
1. Slowly open tank drain by turning clockwise. Allow any water in tank to
drain out. Close fitting securely.
2. Before starting the compressor, check for broken components and
accessories, and check for damage to the hose.
3. Make sure the power switch is turned “O”(OFF) position.
4. Attach desired tool to the end of the air hose.
5. Turn the switch on the “I”(ON) position.
6. Adjust regulator knob to desired pressure level once the pump has shut
o and the compressor has stopped running.
Storage
1. Disconnect tools and/or accessories from the air hose.
2. Locate drain valve on bottom side of tank.
3. Open drain valve to release remaining pressurized air and moisture
from the air tank. Moisture buildup in the tank is normal with air
compressors, so a small amount of water may come out while draining
the tank. Draining the tank is vital for longevity and safety of your air
compressor.
4. Close valve and store the compressor in a cool, dry place.
Shut Down
1. Turn the ON/OFF lever to the OFF position.
2. Rotate the pressure regulator knob counterclockwise until it is fully
closed. Check regulated pressure gauge to ensure that it reads 0 PSI.
3. Remove air hose and other connected accessories.
4. Slowly open air tank drain valve to release remaining pressurized air,
and tilt unit to fully drain accumulated liquid from air tanks. Moisture
build-up in the tank is normal with air compressor, so a small amount of
water may come out while draining the tank. Draining the tank is vital
for the longevity and safely of your air compressor.
5. Close drain valve.
6. Allow compressor to cool down.
7. Clean and store compressor.

16
maintenance
Maintenance
When performing any maintenance or service
·The air compressor must be turned o.
·Drain tanks.
·Allow compressor to cool down.
Daily
·Check oil level.
·Drain accumulated liquid from tanks.
·Check for oil leaks.
·Check for unusual noise and/or vibrations
·Check that all fasteners are secure.
Weekly
·Check safety relief valve.
·Inspect and clean air filter.
·Clean breather holes on oil check dipstick.
Monthly
·Check for air leaks.
·Apply a solution of soapy water around joints.
·Look for air bubbles around joints when compressor reaches the
pressure cut-out limit and pump turns o.
·Adjust belt tension and replace if worn or damaged.
Six Months or 250 Operating Hours
·Change compressor oil.
·Use only SAE 20 or SAE 30 weight non-detergent oil.
·Replace oil more frequently when used in dusty operating environ-
ments.
Oil Change
1. Place oil drain pan below oil drain plug.
2. Remove dipstick to allow air to enter crankcase.
3. Remove oil drain plug.
4. Allow oil to drain completely.
5. Clean and replace oil drain plug.
6. Refill crankcase with SAE 20 or SAE 30 weight non-detergent oil to
red dot on oil level sight glass. Be careful not to overfill.

17
troubleshooting
Trouble Possible Cause Corrective Action
No start condi-
tion
Gas engine not running Check operation of gas
engine
Low pressure Air leak in safety valve Check valve manually by
pulling upward on rings.
If condition persists,
replace valve.
Loose tube or fittings Tighten fittings
Restricted air filter Clean or replace
Belt loose Adjust belt tension
Defective check valve Replace check valve
Safety valve
releasing
Defective pressure
switch
or improper adjustment
Check for proper
adjustment and if prob-
lem persists, replace
pressure switch
Oil discharge
in air
Improper oil viscosity Replace oil with 20-30
weight non-detergent oil
Too much oil in crank-
case
Drain crankcase and fill
to proper level
Restricted air filter Clean or replace filter
Worn piston rings Replace piston rings
Excessive belt
wear
Belt too loose Adjust for proper tension
Belt too tight Adjust for proper tension
Motor pulley out of
alignment
Align motor pulley by
adjusting the position of
the electric motor
During the break-in period, nuts and bolts have a tendency to loosen.
After two weeks, tighten all nuts and bolts including head bolts.
Check every month to make sure all nuts and bolts stay tight.
Troubleshooting Chart

18
parts
AC708RB/AC658HB Pump

19
parts
Parts List
No. Description Qty Part #
1 Bolt 6 6005880B
2 Spring Washer 6 60018
3 Cylinder Head 1 5101UH30
4 Air Filter Assy 1 504034
5 Front Cover, Air Filter 1 504434
6 Element, Air Filter 1 504334
7 Rear Cover, Air Filter 1 504534
8 Exht. Elbow Gasket 1 501365A
9 Exht. Elbow 1 5011UH30
10 In-six Angle Bolt 4 6011825B
11 Copper Washer 4 60028C
12 Exht. Elbow Gasket 1 501365
13 Exht. Cooler 1 5014UH30
13a Bolt 1 531814
14 Nut,Exhaust 1 20341234
15 Exhaust Elbow 1 50051234
16 Gasket, Cylinder Head 1 5102UH30
17 M4*10 Screw 8 6021410
18 Spring Washer 8 60014
19 Outlet Valve Guard 2 514580
20 Valve Plate 2 513380
21 Vavle Seat 1 510365UH
22 Valve Plate 2 51138519
23 Gasket, Cylinder 1 5107UH30
24 Piston Ring Set 2 520065
25 Compression Ring 4 520365
26 Oil Ring 2 520465
27 Piston 2 520265
28 Piston Pin 2 52071457
29 Piston Pin Clip 4 6018147
30 In-Six Angle Bolt 4 6011835
31 Spring Washer 4 60018
32 Connecting Rod 2 5206UB40
33 Splasher 2 5213UH30
34 Spring Washer 2 60014
35 Screw,Cross recess head 2 6021410
36 Six Angle Nut 6 60068
37 Spring Washer 6 60018
No. Description Qty Part #
38 Stud 6 6013835
39 Cylinder 1 52016550
40 Gasket, Cylinder 1 5214UH30
41 Breather Assy 1 533016A
41a Breather 1 533316A
41b Washer,Breather 2 6014153
41c Ball 1 5331113
41d Rod, Breather 1 53321616
42 Gasket, Bearing Cover 1 5312UB20
43 Bearing Cover 1 5313UB40
44 Spring Washer 4 60016
45 Bolt 4 6005620B
46 Oil Leveler 1 532012
47 Washer, Oil Leveler 1 532112
48 Discharge tubing 1 5318UH30
48a Six Angle Nut 1 5318UH301
49 Crankcase 1 5301UH30
50 Bearing 1 60176304
51 Crankshaft 1 5308UH30
52 Woodruff Key 1 601557519
53 Bearing 1 60176205Z
54 Gasket, Bearing Seat 1 5307UH30
55 Oil Seal 1 6016243575
56 Bearing Seat 1 5306UH30
57 Spring Washer 4 60018
58 Bolt 8.8 4 6005825A
59 Pulley 1 53021224A1
60 Pulley Washer 1 5304UB10
61 Spring Washer 1 60018L
62 Bolt 1 6005840L
63 Oil Filling Plug 1 5316UH55
63a Washer 1 6014153

20
parts
AC908HB Pump