Maddox MH20B-1 Montageanleitung
Visit our website at: http://www.harborfreight.com
Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the
back of the manual near the assembly diagram (or month and year of purchase if product has no number).
Keep this manual and the receipt in a safe and dry place for future reference. 19f
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright© 2019 by Harbor Freight Tools®. All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced in
any shape or form without the express written consent of Harbor Freight Tools.
Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein.
To ol s r eq ui r ed f o r as s em bl y a nd se rvice m ay not be in cluded.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.
Page 2 For technical questions, please call 1-888-866-5797. Item 64917
Specifications
Maximum Working Pressure 300 PSI
Pressure Gauge Scale 0 – 300 PSI / 0 – 2000 kPa
IMPORTANT SAFETY INFORMATION
1. Block drive wheels before use.
Set parking brake and put
gear selector in neutral for
manual transmission or park
for automatic transmission.
Risk of sudden vehicle movement!
2. Read vehicle’s service
manual before use.
3. Keep away from hot or
moving engine parts.
4. Use with gasoline engines only.
Do not exceed gauge range.
5. Secure connections before use.
6. Inspect before every use;
do not use if parts loose or damaged.
7. Wear ANSI-approved safety
goggles during use.
8. Use the Tester only in well-ventilated
areas. A running gasoline engine
produces carbon monoxide.
Carbon monoxide is a colorless,
odorless, gas that can cause
serious injury or death.
9. Maintain product labels and
nameplates. These carry
important safety information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.
10. People with pacemakers should
consult their physician(s) before
use. Electromagnetic fields in close
proximity to heart pacemaker could
cause pacemaker interference or
pacemaker failure.
Caution is necessary when near coil,
spark plug cables, or distributor of
running engine. Engine should be
off during distributor adjustment.
11. The warnings, precautions, and
instructions discussed in this manual
cannot cover all possible conditions
and situations that may occur.
The operator must understand that
common sense and caution are factors,
which cannot be built into this product,
but must be supplied by the operator.
SUPERIOR AUTOMOTIVE TOOLS
Page 3For technical questions, please call 1-888-866-5797.Item 64917
Operating Instructions
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the
beginning of this document before set up or use of this product.
NOTE: Performing a compression test requires the work of two individuals;
one person to operate the vehicle’s ignition switch while the
other person operates the Compression Tester.
1. WARNING! Avoid carbon
monoxide poisoning! Never run
a gasoline engine in an enclosed
garage or other contained area.
Prepare the engine for compression
testing by starting the engine
and allowing it to warm up to its
normal operating temperature.
Then, switch off the ignition.
2. Once the engine has been turned
off, disconnect ground (negative)
battery cable before testing to prevent
accidental starting. Disconnect both
coil wires from the coil of the engine.
Insulate coil wires or route them away
from each other and all metal surfaces.
3. Before removing the spark plugs,
clean the area around the spark
plugs using compressed air.
It is important to prevent foreign
materials from falling into the cylinders
once the spark plugs are removed.
4. Remove all of the spark plugs. Note
the position of the wires so that the
correct wire may be replaced on each
plug at the end of the job. On engines
with two spark plugs per cylinder,
remove only one plug per cylinder.
5. Determine the correct size Spark Plug
Adapter and/or Hose Assembly for
the vehicle. Thread Adapter and/or
Hose into spark plug hole of cylinder
to be tested and hand tighten only.
6. Connect the male fitting on the
Hose Assembly to the female
coupler on the Gauge Hose.
7. To use the Triton Connector, thread
it onto the end of one of the Hose
Assemblies or the Deep Well Connector.
8. With the gas pedal pressed all
the way down, crank the engine
for at least eight revolutions.
9. While cranking the engine, observe the
Gauge. Record the maximum reading.
10. After recording the maximum reading,
stop cranking the engine. Release
the air pressure in the Gauge by
pressing the Air Release Button.
11. Remove the Compression Tester
from the first engine cylinder.
Then repeat Steps 6, 7, 8 and 9 for
the remaining engine cylinders.
NOTE: Good engine cylinder compression
will be indicated with a high initial reading,
and a progressive build-up to the final
maximum reading. Poor engine cylinder
compression will be indicated with a
low initial reading, and a much slower
build-up to the final maximum reading.
The compression readings for all of
the engine cylinders should not vary
by more than 10%. Check vehicle service
manual for manufacturer’s specifications
and acceptable pressure ranges.
12. When testing is complete, reinstall
spark plugs and spark plug wires
in proper order. Reconnect ground
(negative) battery cable and coil wires.
13. Store the Kit in its case in a clean, dry,
safe location out of reach of children.
Page 4 For technical questions, please call 1-888-866-5797. Item 64917
Inspection, Maintenance and Cleaning
Procedures not specifically explained in this manual
must be performed only by a qualified technician.
TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION:
Detach the tool from the vehicle being tested before performing
any inspection, maintenance, or cleaning procedures.
TO PREVENT SERIOUS INJURY FROM TOOL FAILURE:
Do not use damaged equipment. If abnormal noise or vibration
occurs, have the problem corrected before further use.
1. BEFORE EACH USE, inspect
the general condition of the tool.
Check for cracked or broken parts,
damaged hoses, loose fittings,
misalignment or binding of moving
parts, and any other condition that
may affect its safe operation.
2. AFTER USE, clean external surfaces of
the tool when necessary with a clean,
damp cloth and mild detergent. Store
the Kit in its case in a clean, dry, safe
location out of reach of children.
Page 5For technical questions, please call 1-888-866-5797.Item 64917
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST
AND DIAGRAM IN THIS DOCUMENT AS A REFERENCE TOOL ONLY. NEITHER
THE MANUFACTURER OR DISTRIBUTOR MAKES ANY REPRESENTATION OR
WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO
MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS QUALIFIED
TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER
AND/OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS
REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED
TECHNICIANS, AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK
AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL
PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF
HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.
Page 6 For technical questions, please call 1-888-866-5797. Item 64917
Parts List and Diagram
Parts List
Part Description
1 Gauge Assembly
218 mm Spark Plug Adapter
312 mm Spark Plug Adapter
410 mm Spark Plug Adapter
5Ford Triton 16 mm Connector
Part Description
6Standard 14 mm Hose Assembly
7Long Reach 14 mm Hose Assembly
8Deep Well 14 mm Connector
9 Valve Repair Kit (not shown)
10 Case (not shown)
Record Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Some parts are listed for illustration purposes only, and
are not available individually as replacement parts.
Page 7For technical questions, please call 1-888-866-5797.Item 64917
Diagram
1
2
3
5
4
8
6
7
Limited 90 Day Warranty
Harbor Freight Tools Co. makes every effort to assure that its products meet high
quality and durability standards, and warrants to the original purchaser that this
product is free from defects in materials and workmanship for the period of 90 days
from the date of purchase. This warranty does not apply to damage due directly or
indirectly, to misuse, abuse, negligence or accidents, repairs or alterations outside
our facilities, criminal activity, improper installation, normal wear and tear, or to lack of
maintenance. We shall in no event be liable for death, injuries to persons or property,
or for incidental, contingent, special or consequential damages arising from the use
of our product. Some states do not allow the exclusion or limitation of incidental or
consequential damages, so the above limitation of exclusion may not apply to you. THIS
WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us
with transportation charges prepaid. Proof of purchase date and an explanation
of the complaint must accompany the merchandise. If our inspection verifies
the defect, we will either repair or replace the product at our election or we may
elect to refund the purchase price if we cannot readily and quickly provide you
with a replacement. We will return repaired products at our expense, but if we
determine there is no defect, or that the defect resulted from causes not within the
scope of our warranty, then you must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also
have other rights which vary from state to state.
26541 Agoura Road • Calabasas, CA 91302 • 1-888-866-5797
SUPERIOR AUTOMOTIVE TOOLS
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