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Table of Contents
Related Manuals for CAT Pumps 3CP Series
Summary of Contents for CAT Pumps 3CP Series
- Page 1 SERVICE MANUAL 3CP BRASS PLUNGER PUMPS PUMP MODELS INCLUDED 3CP1120 3CP1120G 3CP1130 3CP1140 See the 3CP1120/3CP1130/3CP1140 Valve and Seal Service Videos at www.catpumps.com/3cp-service-videos Product Quality, Reliability and Support You Expect www.catpumps.com...
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Page 2: Table Of Contents
Torque Chart Obey all safety messages that follow this Manifold Screws Torque Sequence symbol to avoid possible injury or death. Technical Bulletin Reference Chart Diagnosis and Maintenance SERVICE MANUAL | 3CP Series Plunger Pumps (763) 780-5440 | techsupport@catpumps.com | www.catpumps.com... -
Page 3: General Safety Information
2. Wear mask, goggles or eye protection while operating high-pressure equipment. 3. Obtain a Safety Data Sheet (SDS) and take appropriate safety measures for the liquid being handled. (763) 780-5440 | techsupport@catpumps.com | www.catpumps.com SERVICE MANUAL | 3CP Series Plunger Pumps... - Page 4 1. Follow safety instructions as found in SDS or on packaging of each liquid. 2. Clean equipment in a well-ventilated area. 3. Disposal of solvents to be in accordance with local, state and federal regulations. SERVICE MANUAL | 3CP Series Plunger Pumps (763) 780-5440 | techsupport@catpumps.com | www.catpumps.com...
- Page 5 1. Fill pump crankcase to specific capacity indicated on data sheet or service manual prior to startup. 2. Cat Pumps premium custom-blend oil is available worldwide in 21-ounce bottles, (single and 12-pack cases), 2.5 gallon jugs (single and 2-pack) or 30 gallon drums. Use of other oils may void the warranty.
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Page 6: Seal & Valve Kits
The seals on our pumps, operating under normal conditions, will perform for a minimum of 1500 hours, with most lasting much longer. The valves typically perform for 3000 hours, with many lasting much longer. Cat Pumps always recommends replacing these items as a kit since components usually wear at about the same rate. -
Page 7: Seal & Valve Kit Pump Diagram
9. Rubber Mallet 4. Needle Nose Pliers 10. Oil Bubble Gauge Tool 5. Reverse Pliers (PN 30696) 11. Lubricating Oil 6. Adjustable Wrench 12. Liquid Thread Sealant (763) 780-5440 | techsupport@catpumps.com | www.catpumps.com SERVICE MANUAL | 3CP Series Plunger Pumps... -
Page 8: Servicing The Seals
Avoid grasping the first step where the low- pressure seal sits. SERVICE MANUAL | 3CP Series Plunger Pumps (763) 780-5440 | techsupport@catpumps.com | www.catpumps.com... -
Page 9: Seal Installation
Press into place. groove and spring. Install groove side outside surface. facing down and press into place. (763) 780-5440 | techsupport@catpumps.com | www.catpumps.com SERVICE MANUAL | 3CP Series Plunger Pumps... -
Page 10: Plunger Removal
1.22 Use a pick to remove keyhole washer scoring to the surface. Clean with a wire- and barrier slinger located behind the wheel brush if necessary. plunger. Inspect for damage. SERVICE MANUAL | 3CP Series Plunger Pumps (763) 780-5440 | techsupport@catpumps.com | www.catpumps.com... -
Page 11: Plunger Reassembly
1.30 Install seal retainer with tabs facing rod by hand, and torque to 55 in-lbs, down. 4.6 ft-lbs or 6.2 Nm. Loctite and 242 are registered trademarks of the Henkel Corporation. (763) 780-5440 | techsupport@catpumps.com | www.catpumps.com SERVICE MANUAL | 3CP Series Plunger Pumps... -
Page 12: Manifold Reassembly
Torque to plunger rod assemblies and that seals 115 in-lbs, 9.58 ft-lbs, or 13 Nm. are not binding. See torque sequence below. TORQUE SEQUENCE SERVICE MANUAL | 3CP Series Plunger Pumps (763) 780-5440 | techsupport@catpumps.com | www.catpumps.com... -
Page 13: Servicing The Valves
If replacing complete valve kit assemblies, skip to Valve Installation 2.18. 2.04 The valve seat O-ring might remain in the manifold. Use a pick or small flat tip screwdriver to remove O-ring. (763) 780-5440 | techsupport@catpumps.com | www.catpumps.com SERVICE MANUAL | 3CP Series Plunger Pumps... -
Page 14: Valve Disassembly
Pitting on the valve seat or valve is an indication of cavitation. Review our Cavitation Troubleshooting Support Document for assistance. www.catpumps.com/cavitation-troubleshooting 2.11 Inspect valve seat O-ring for cuts, nicks, or damage. SERVICE MANUAL | 3CP Series Plunger Pumps (763) 780-5440 | techsupport@catpumps.com | www.catpumps.com... -
Page 15: Valve Reassembly
2.15 Place spring retainer onto valve seat. 2.16 Using a rubber mallet, lightly tap spring 2.17 Replace valve seat O-ring and apply a retainer into place. lubricant to outside surface. (763) 780-5440 | techsupport@catpumps.com | www.catpumps.com SERVICE MANUAL | 3CP Series Plunger Pumps... -
Page 16: Valve Installation
Torque to 870 in-lbs, 72.5 ft-lbs, or 98 Nm. Loctite and 242 are registered trademarks of the Henkel Corporation. SERVICE MANUAL | 3CP Series Plunger Pumps (763) 780-5440 | techsupport@catpumps.com | www.catpumps.com... -
Page 17: Crankcase Component Inspection
If contamination is suspected, inspect and replace the seals in the pump manifold, then clean out the inside of the crankcase and change the oil. Spot-check the following areas for signs of leaks and contact Cat Pumps or a local distributor for servicing crankcase if needed. Crankshaft Oil Seals... -
Page 18: Reference Information
Cat Pumps recommends using our custom-blend premium grade hydraulic oil formulated to meet Cat Pumps specifications. For best results, perform an initial oil change after the first 50 hours of operation and every 500 hours thereafter. -
Page 19: Torque Chart
Seal Case Modification 3CP1120, 3CP1120.3400, 3CP1130, 3CP1130.3400, 3CP1140, 3CP1140.3400 Replacement Pressure Washer Gas Engine Direct Pumps Drive Pumps Piston and Plunger Pump Piston and Plunger Crankcase Capacities Pumps (763) 780-5440 | techsupport@catpumps.com | www.catpumps.com SERVICE MANUAL | 3CP Series Plunger Pumps... -
Page 20: Diagnosis And Maintenance
For International Inquiries go to www.catpumps.com and navigate to the “Contact” link. ©2021 Cat Pumps. All written and visual data contained in this document reflects the latest product information available at the time of publication. Cat Pumps reserves the right to make changes at any time without notice.