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JCT-4660 series Paving Breaker 

 

Warranty and Service 

JET warrants every product it sells against manufacturers’ defects. If one of our tools needs service or repair, please contact

 

Technical Service by calling 1-800-274-6846, 8AM to 5PM CST, Monday through Friday. 

Warranty Period

 

The general warranty lasts for the time period specified in the literature included with your product or on the official JET branded 
website.  

 

JET products carry a limited warranty which varies in duration based upon the product. (See chart below) 

 

Accessories carry a limited warranty of one year from the date of receipt. 

 

Consumable items are defined as expendable parts or accessories expected to become inoperable within a 
reasonable amount of use and are covered by a 90 day limited warranty against manufacturer’s defects. 

Who is Covered 

This warranty covers only the initial purchaser of the product from the date of delivery. 

What is Covered 

This warranty covers any defects in workmanship or materials subject to the limitations stated below. This warranty does not cover 
failures due directly or indirectly to misuse, abuse, negligence or accidents, normal wear-and-tear, improper repair, alterations or 
lack of maintenance. JET woodworking machinery is designed to be used with Wood. Use of these machines in the processing of 
metal, plastics, or other materials outside recommended guidelines, may void the warranty. The exceptions are acrylics and other 
natural items that are made specifically for wood turning. 

Warranty Limitations 

Woodworking products with a Five Year Warranty that are used for commercial or industrial purposes default to a Two Year 
Warranty. Please contact Technical Service at 1-800-274-6846 for further clarification.

 

How to Get Technical Support 

Please contact Technical Service by calling 1-800-274-6846. 

Please note that you will be asked to provide proof of initial 

purchase when calling. 

If a product requires further inspection, the Technical Service representative will explain and assist with 

any additional action needed.

 

JET has Authorized Service Centers located throughout the United States. For the name of an 

Authorized Service Center in your area call 1-800-274-6846 or use the Service Center Locator on the JET website.

 

More Information 

JET is constantly adding new products. For complete, up-to-date product information, check with your local distributor or visit the 
JET website. 

How State Law Applies 

This warranty gives you specific legal rights, subject to applicable state law.  

Limitations on This Warranty 

JET LIMITS ALL IMPLIED WARRANTIES TO THE PERIOD OF THE LIMITED WARRANTY FOR EACH PRODUCT. EXCEPT AS 
STATED HEREIN, ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
EXCLUDED. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE 
ABOVE LIMITATION MAY NOT APPLY TO YOU. 
JET 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 PRODUCTS. SOME STATES 
DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE 
LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU. 
 
JET sells through distributors only. The specifications listed in JET printed materials and on official JET website are given as 
general information and are not binding. JET reserves the right to effect at any time, without prior notice, those alterations to parts, 
fittings, and accessory equipment which they may deem necessary for any reason whatsoever. JET

®

 branded products are not 

sold in Canada by JPW Industries, Inc. 

Product Listing with Warranty Period  

90 Days – Parts; Consumable items 
1 Year – Motors; Machine Accessories 
2 Year – Metalworking Machinery; Electric Hoists, Electric Hoist Accessories; Woodworking Machinery used for industrial  
or commercial purposes 
5 Year – Woodworking Machinery 
Limited Lifetime – JET Parallel clamps; VOLT Series Electric Hoists; Manual Hoists; Manual Hoist   
Accessories; Shop Tools; Warehouse & Dock products; Hand Tools; Air Tools 

NOTE:  JET is a division of JPW Industries, Inc. References in this document to JET also apply to JPW Industries, Inc., or any of 
its successors in interest to the JET brand. 

 

Summary of Contents for 550660

Page 1: ...neumatic Paving Breaker 550660 JCT 4660 550661 JCT 4661 Operation Parts Manual M 550660 Edition 2 05 2017 JET 427 New Sanford Road LaVergne TN 37086 Ph 800 274 6848 www jettools com Copyright 2017 JET...

Page 2: ...ucts Arsenic and chromium from chemically treated lumber Your risk of exposure varies depending on how often you do this type of work To reduce your exposure to these chemicals work in a well ventilat...

Page 3: ...with care Keep air tool clean and oiled for best and safest performance 32 Do not use combustible gases carbon dioxide oxygen or any bottled gas as an air source for the tool These can present risk of...

Page 4: ...s and warnings in this manual may not encompass all possible workplace environments The operator is expected to take appropriate precautions and exercise common sense As with any tool operation safety...

Page 5: ...3 m s2 Noise level 1 108 dB A 110 dB A Overall length 36 5 in 927mm 29 6 in 751 8mm Housing material steel steel Oil reservoir capacity 18 cc 36 cc Net weight 66 lb 30 kg 92 4 lb 42 kg Shipping weigh...

Page 6: ...moisture then connect air supply hose to tool Set air pressure to 90 psi IMPORTANT Connecting a quick change coupling directly to the tool is not recommended as vibration may cause the connection to f...

Page 7: ...ad from cylinder and remove throttle valve throttle valve spring plunger and plunger spring 4 Remove valve guide valve valve chest valve seat valve chest dowel pin and piston 5 Remove cylinder tappet...

Page 8: ...s 4 Assemble front head bolt springs front head lock washer and tighten front head bolt nut A minimum of three bolt threads should be visible 5 Assemble valve seat valve valve chest and valve guide in...

Page 9: ...le air filter that can be easily cleaned Use safety shut off valves so air flow can be stopped quickly in case of a line break When using multiple hoses air hoses should be larger than leader hose Joi...

Page 10: ...ice JCT 4660 JCT 4661 Front Head Bolt 2 2 5mm 3mm Back Head Bolt 166 3 202 5 166 3 202 5 Front Retainer Bolt 43 4 57 8 43 4 57 8 Oil Tank Bolt 57 8 28 9 32 5 GD Plug 7 2 10 8 10 8 14 5 Air Inlet Assem...

Page 11: ...al Loss of power erratic action Low air pressure or air volume Verify compressor has proper CFM rating for tool Check compressor regulator setting set air pressure to 90 psi Check for loose connection...

Page 12: ...have entered during assembly Excessive heat develops in tool Improper lubrication Lubricate properly according to instructions in this manual Worn internal parts Inspect and replace as needed Tool con...

Page 13: ...ugh Friday 8 00 a m to 5 00 p m CST Please have the stock number and serial number of your tool available when you call so that we may serve you quickly and accurately Non proprietary parts such as fa...

Page 14: ...14 JCT 4660 series Paving Breaker 550660 JCT 4660 Paving Breaker 60 lb...

Page 15: ...e chest dowel pin 1 4x20L 1 25 JCT4660 25 Cylinder 1 Index Part No Description Qty 26 P91238 Air inlet screen 1 27 P91222 Air inlet swivel o ring 28 5x2mm 1 28 P91235 Air inlet swivel 1 29 P91237 O ri...

Page 16: ...16 JCT 4660 series Paving Breaker 550661 JCT 4661 Paving Breaker 90 lb...

Page 17: ...valve spring 1 25 P91202 Cylinder plug 5 26 JCT4661 26 Cylinder 1 Index Part No Description Qty 27 P91238 Air inlet screen 1 28 P91222 Air inlet swivel o ring 28 5x2mm 1 29 P91235 Air inlet swivel 1...

Page 18: ...with any additional action needed JET has Authorized Service Centers located throughout the United States For the name of an Authorized Service Center in your area call 1 800 274 6846 or use the Servi...

Page 19: ...JET 19 This page intentionally left blank...

Page 20: ...20 JCT 4660 series Paving Breaker 427 New Sanford Road LaVergne Tennessee 37086 Phone 800 274 6848 www jettools com...

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