Related Manuals for Jet JCT-4660
Summary of Contents for Jet JCT-4660
- Page 1 Pneumatic Paving Breaker #550660, JCT-4660 #550661, JCT-4661 Operation & Parts Manual M-550660 Edition 2 05/2017 427 New Sanford Road LaVergne, TN 37086 Ph.: 800-274-6848 www.jettools.com Copyright © 2017 JET...
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Page 2: Safety Warnings
10. The air tool must be properly lubricated before operating. Do not use this tool for other than its intended use. If used for other purposes, JET disclaims 11. Never start a percussion type air tool (chipper, any real or implied warranty and holds itself breaker, buster, etc.) without securing the... - Page 3 22. Shut off air supply and discharge any residual 33. Do not lubricate the tool with combustible pressure from tool before removing hose, liquids, such as kerosene, diesel or jet fuel. making adjustments, changing accessories, 34. Do not dispose of this tool with normal or storing tool.
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Page 4: About This Manual
As with any tool operation, safety of operator and bystanders should be first priority. If there are questions or comments, please contact your local supplier or JET. JET can also be reached at our web site: www.jettools.com. -
Page 5: Tool Specifications
Specifications were current at time of publication, but because of our policy of continuous improvement, JET reserves the right to change specifications at any time and without prior notice, without incurring obligations. -
Page 6: Setup And Assembly
Periodically check torque of bolts in front and back head. Loose bolts can result in loss of power and Note: When installing a chisel, blade should tool damage. See “Torque specifications.” be parallel with handles on breaker. JCT-4660 series Paving Breaker... - Page 7 Lubrication Remove cylinder, tappet seat, and tappet. Disassemble front head: The paving breaker should be lubricated with air tool oil maintained in the reservoir, and with an in- • Loosen the steel retainer bolt nut. line oiler. • Remove steel retainer bolts, steel...
- Page 8 A minimum of three bolt threads should be visible. Assemble valve seat, valve, valve chest, and valve guide into cylinder. Note: Valve chest and valve guide must align with knock placement. The valve has no orientation. Install valve chest dowel pin. JCT-4660 series Paving Breaker...
- Page 9 Use a light oil containing rust inhibitors, such as a bolt or nut with an air impact wrench at SAE #10. Many JET air tools have integral oil maximum setting, the air wrench is too small or reservoirs, which should be kept filled when in-line the air compressor CFM is not powerful enough oilers are not used.
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Page 10: Torque Specifications
Figure 2 Recommended arrangement of air piping and air line system Torque specifications Refer to this chart when assembling parts or tightening after a period of service. JCT-4660 JCT-4661 Front Head Bolt 2-2.5mm * 3mm * Back Head Bolt 166.3-202.5 166.3-202.5... - Page 11 Troubleshooting JCT-4660 series Paving Breakers Any disassembly of the tool should be done by qualified service personnel. For problems not addressed below, contact JET technical service at 800-274-6846. Problem Possible cause Remedy Tool will not start. Air valve closed or obstructed.
- Page 12 Use steel with correct shank type. retainer bushing. Front head bushing is worn. Replace bushing. Steel retainer latch refuses Excessive wear of retainer. Replace parts as needed. to catch. Excessive wear of retainer Replace parts as needed. plunger and spring. JCT-4660 series Paving Breaker...
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Page 13: Replacement Parts
Non-proprietary parts, such as fasteners, can be found at local hardware stores, or may be ordered from JET. Some parts are shown for reference only, and may not be available individually. - Page 14 #550660, JCT-4660 Paving Breaker (60 lb.) JCT-4660 series Paving Breaker...
- Page 15 #550660, JCT-4660 Paving Breaker (60 lb.) Index Part No. Description Index Part No. Description P61119 Oil plug 26 P91238 Air inlet screen JCT4660-02 Back head Air inlet swivel o-ring 27 P91222 28.5x2mm P91245 Felt oiler Ø8.5x25L 28 P91235 Air inlet swivel...
- Page 16 #550661, JCT-4661 Paving Breaker (90 lb.) JCT-4660 series Paving Breaker...
- Page 17 #550661, JCT-4661 Paving Breaker (90 lb.) Index Part No. Description Index Part No. Description P91213 Rubber grip 27 P91238 Air inlet screen JCT4661-02 Back head Air inlet swivel o-ring 28 P91222 28.5x2mm P91220 Oil control plug 1/8PT 29 P91235 Air inlet swivel P91245 Felt oiler Ø8.5x25L 30 P91237...
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Page 18: Warranty And Service
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. - Page 19 This page intentionally left blank.
- Page 20 427 New Sanford Road LaVergne, Tennessee 37086 Phone: 800-274-6848 www.jettools.com JCT-4660 series Paving Breaker...