Harbor Freight Tools 93039 User Manual

DIESEL ENGINE COMPRESSION  
TESTER SET  
93039  
OPERATING INSTRUCTIONS  
®
3491 Mission Oaks Blvd., Camarillo, CA 93011  
TO PREVENT SERIOUS INJURY,  
READ AND UNDERSTAND ALL WARNINGS  
AND INSTRUCTIONS BEFORE USE.  
©
®
Copyright 2005 by Harbor FreightTools . 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 FreightTools.  
For technical questions and replacement parts, please call 1-800-444-3353.  
11.  
REPLACEMENT PARTS AND ACCESSORIES. When servicing, use only identical  
replacement parts. Only use accessories intended for use with this product.  
Approved accessories are available from Harbor Freight Tools.  
12.  
13.  
14.  
MAINTAIN THIS PRODUCT WITH CARE. Keep this tool clean and dry for better  
and safer performance.  
MAINTENANCE: For your safety, service and maintenance should be performed  
regularly by a qualified technician.  
USETHE RIGHT PRODUCT FORTHE RIGHT JOB. There are certain applications  
for which this product was designed. Do not use small equipment, tools or attachment  
to do the work of larger industrial equipment, tools or attachments. Do not use this  
product for a purpose for which it was not intended. NOT FOR OXYGEN SERVICE  
USE.  
15.  
16.  
PRIOR TO USING THIS PRODUCT, READ AND ADHERE TO ALL  
INSTRUCTIONS AND SAFETY PRECAUTIONS AS OUTLINED INTHEVEHICLE  
MANUFACTURER’S MANUAL AND ENGINE DIAGNOSTIC/REPAIR MANUALS.  
ALWAYS RELEASE THE PRESSURE PROPERLY USING THE PRESSURE  
RELEASE VALVE (see page 4) BEFORE DISCONNECTING THE ADAPTER.  
17.  
18.  
USE EXTREME CARE AROUND HOT OR MOVING ENGINE PARTS.  
DO NOT EXCEEDTHE MAXIMUM PRESSURE CAPACITY OFTHISTOOL (1,000  
PSI /70 BAR). Exceeding the maximum pressure capacity could cause serious  
personal injury and/or property damage.  
19.  
20.  
USE THE COMPRESSION TESTER ONLY IN WELL VENTILATED AREAS. A  
running engine produces carbon monoxide. Carbon monoxide is a colorless,  
odorless, gas that, if inhaled, can cause serious injury or death.  
WHEN WARMING UP AN ENGINE IN PREPARATION FOR COMPRESSION  
TESTING, MAKE SURE THE VEHICLE’S TRANSMISSION IS PLACED IN  
PARK”, (OR NEUTRAL FOR A MANUAL TRANSMISSION) AND THE  
EMERGENCY BRAKE IS APPLIED.  
21.  
WARNING: The brass components of this product contain lead, a chemical known  
to the State of California to cause cancer and birth defects (or other reproductive  
harm). (California Health & Safety Code § 25249.5 et seq.)  
UNPACKING  
When unpacking, check to make sure the parts listed on the next page of this manual  
are included. If any parts are missing or broken, please call Harbor Freight Tools at the  
number shown on the cover of this manual as soon as possible.  
SKU 93039  
For technical questions, please call 1-800-444-3353.  
Page 3  
PARTS LIST / ASSEMBLY DIAGRAM  
Part  
Diagram  
Description  
Engine Applications  
Gauge Assembly  
(Includes Gauge, Hose,  
and Coupler)  
1
-
®
Cummins  
2
3
4
Fuel Injector Adapter  
2.9 L, 3.9 L, 5.9 L  
These 5.5" Bore  
Cummins Engines:  
Fuel Injector Adapter NH (855 Cubic Inches),  
V-6, V-8, V-12, &  
®
903 V-8 Cylindrical PTB  
®
Cummins  
Fuel Injector Adapter  
V-185, V-210, V-225,  
V-555, VT-255, VT-555  
®
Cummins  
5
6
Fuel Injector Adapter  
Carrying Case  
6 BT, 4.02" Bore, 5.9 L  
-
-
Gauge (1)  
Pressure  
Release  
Valve  
NOTE: Some parts are listed and shown for illustration purposes only, and are not available individually as replacement parts.  
SKU 93039  
For technical questions, please call 1-800-444-3353.  
Page 4  
PLEASE READ THE FOLLOWING CAREFULLY  
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS MANUAL AS A  
REFERENCETOOL ONLY. NEITHERTHE MANUFACTURER NOR DISTRIBUTOR MAKES ANY REPRESENTATION  
OR WARRANTY OF ANY KINDTOTHE BUYERTHAT HE OR SHE IS QUALIFIEDTO MAKE ANY REPAIRSTOTHE  
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 PARTSTHERETO, OR ARISING OUT OF HIS OR HER INSTALLATION  
OF REPLACEMENT PARTS THERETO.  
PRODUCT OVERVIEW  
The Engine Compression Test Set measures cylinder pressure on diesel-equipped  
cars and trucks. The Gauge (1) features a release valve, 16” of high pressure hose, a dial  
reading from 0-1,000 PSI, a 0-70 bar, and a quick coupler for convenient connection to the  
Adapters (2-5).  
Hose  
Adapter (3)  
collar  
and  
Coupler  
(1)  
ADAPTER CONNECTION/REMOVAL  
1.  
2.  
3.  
4.  
Pull the collar at the end of the Coupler (1) away from the opening of the  
hose and insert the end of the correct Adapter (2-5) for your application.  
Let go of the collar and press the Adapter into the Coupler until the collar  
moves forward.  
Pull on the Adapter (2-5) to ensure that it is properly connected to the Coupler.  
The Adapter is ready for use.  
After use, release all pressure in the tool using the pressure release valve  
(see page 4) and remove the Adapter (2-5) from the engine. Carefully clean  
the Adapter and Gauge Assembly (1). Pull the collar back and remove the  
Adapter. Store all parts in the provided case.  
SKU 93039  
For technical questions, please call 1-800-444-3353.  
Page 5  
TESTING PROCEDURES  
Due to the variations in engine design and testing  
procedure, it is beyond the scope of this manual to cover  
all possible testing procedures.  
ALWAYS REFER TO AND CAREFULLY ADHERE TO THE  
APPROPRIATE  
ENGINE  
MANUFACTURER’S  
INSTRUCTIONS FOR USING THIS KIT.  
INSPECTION, MAINTENANCE, AND CLEANING  
1.  
Before each use, inspect the general condition of the Compression Tester. Check  
for broken, cracked, or bent parts, loose or missing parts, and any condition that  
may affect the proper operation of the product. If a problem occurs, have the problem  
corrected before further use.  
Do not use damaged equipment.  
2.  
3.  
When cleaning, use a clean cloth with a mild detergent. Do not use solvents, as  
damage to the Compression Tester may result. Do not immerse the Gauge (1) in  
any liquid. Then, store the CompressionTester inside the case in a safe, dry location  
out of reach of children.  
WARNING! All maintenance, service, or repairs not listed in this manual are  
only to be attempted by a qualified service technician.  
SKU 93039  
For technical questions, please call 1-800-444-3353.  
Page 6  

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