Skip to content
STOCK YOUR SHOP: Save Up to 50%. Shop Now >
Northern Tool Equipment Logo TextNorthern Tool Equipment Logo text link to Home.
Print

Cat Pumps Pressure Washer Pump, 3500 PSI, 4.5 GPM, Belt Drive, Model# 5CP3120

Item# A157304
Cat Pumps Pressure Washer Pump, 3500 PSI, 4.5 GPM, Belt Drive, Model# 5CP3120

This is a carousel with one large zoomable image and a track of thumbnails on the left. Select any of the thumbnail buttons to change the zoomable image on the right. If a thumbnail is a video or 360 degree image thumbnail, or the last thumbnail in the list, the button will open the product media modal.

Cat Pumps Pressure Washer Pump, 3500 PSI, 4.5 GPM, Belt Drive, Model# 5CP3120

Click or Tap image to Zoom

$869.99

  • Shipping: 

    Free shipping (lower 48 states) - Available now

  • Store Pickup: 

    Not available - online only
  • Pre-plumbed and pre-tested
  • Fits 4-bolt motor face plates
  • Belt drive

See full description

Complete Your Solution

  • Cat Pumps Pressure Washer Pump, 3500 PSI, 4.5 GPM, Belt Drive, Model# 5CP3120
  • Cat Pumps Pressure Washer Pump Oil, 21 Oz.
  • NorthStar Pressure Washer Pump Freeze Guard, 12 Oz.
  • 3M Reusable Corded Earplugs, NRR 25dB, Model# 90586-80000
Price for all four:

$899.96

Frequently Bought Together

  • Description

  • Key Specs

  • Reviews

  • Q & A

  • Accessories

  • Warranty

  • Compare

Product Summary

Fast changeover, even in the field. Pre-plumbed and pre-tested. Fits 4-bolt engine face plates. Bolts not included; use existing bolts from old pump to install new pump. U.S.A.

What's Included

    (1) Pressure washer pump

Downloads

Product Manual

Features + Benefits

  • Pre-plumbed and pre-tested
  • Fits 4-bolt motor face plates
  • Belt drive

Key Specs

AttributeSpecification

item#

A157304

Brand

CAT Pumps

Manufacturer's Warranty

12 months parts/12months labor

Ship Weight

29.2 LB

Max. PSI

3,500
AttributeSpecification

GPM

4.5

Horsepower

15 HP

Product Type

Pump

Shaft Diameter

0.78 in

Fuel Type

Multi-Fuel

Reviews

Questions & Answers

5 Reviews This action will navigate to reviews.

Questions

1–10 of 13 Questions  
Sort by:

  1. What are the specs on the unloader valve

    E.g. Max/min pressure, max/ min flow...

    1. The unloader valve on this pump is adjustable from 3500 PSI to as low as you want it, keep in mind that the life of the valve will shorten the lower you set the PSI. Please view the compatible pressure gauge item 32154.

      Helpful?

    2. The unloader valve on this CAT pump can adjust from 3500 PSI at maximum to as low as you want it, keep in mind that the life of the valve will shorten the lower you set the PSI. Please see the pressure gauge we offer listed below...

      Helpful?

  2. LOOKING FOR A REPLACEMENT PUMP

    I HAVE A CAT 5CP3120G1 THAT IS NOT WORKING AND I NEED TO REPLACE IT. I HAVE A 13 H.P. HONDA. NOT LOOKING FOR A $600.00 PUMP. THANKS

    1. This pump requires 15 horsepower to operate. If you used this pump on your existing engine it may not produce the full 3500 psi and 4.5 flow. My specs show that your existing pump is 3500 psi and 4 gpm. Please view suitable replacements item A1578201 and A1578151.
      Before ordering make sure that the size of the shaft on your engine matches the required shaft size for the pump that you are ordering.

      Helpful?

    2. This pump requires 15 horsepower to operate at capacity. If you used this pump on your existing engine it may not produce the full 3500psi/4.5gpm. My specs show that your existing pump is 3500psi/4.0gpm.

      The psi. of a pump will determine how tough of a job that the washer will be able to complete and the gpm will determine how fast that work gets done.

      We have a few options that will work with the horsepower that you have available, that I will post in the links below.

      Before ordering make sure that you confirm that size of the shaft on your engine matches the required shaft size for the pump that you are ordering.

      Helpful?

  3. How do you prime this pump?

    1 answer

    1. To purge the pump of trapped air, you would attach a water hose to the pump's inlet. Do not attach the high pressure hose yet. Turn the water on and allow water to flow through the pump and exit through the high-pressure outlet. Let the water run for 1-2 minutes to flush air pockets out. Turn the water supply off and connect the high pressure hose and spray gun, then turn the water back on.

      Helpful?

  4. does the pump come with oil or do I need to purchase oil?

    1 answer

    1. The pump will come with oil in it. It recommended to check the oil level when you receive it.

      Helpful?

  5. What make and model is the unloader

    1 answer

    1. Cat Pumps model number for the unloader on this pump is 7694 and it is made in Italy for them. They do not have the make listed for it.

      Helpful?

  6. I have a 7.5hp 3 phase electric motor that I want to match up to a pressure washer... Can I slow the pump down slightly to lower the GPM and horsepower needed?

    1 answer

    1. This pump requires a 15 HP minimum gas engine or an 11 HP minimum electric motor to operate. This pump should not be modified to fit the described application.

      Helpful?

  7. What rotation does this pump require? Can it run either direction?

    1 answer

    1. This can operate in either direction.

      Helpful?

  8. What are the dimensions of the holes on the mounting bracket?

    1 answer

    1. The mounting bolt pattern is 125mm (4.92") x 80mm (3.15") square.

      Helpful?

  9. Does this pump have a shaft on both the left and right side?

    1 answer

    1. This Cat Pumps Pressure Washer Pump has one shaft.

      Helpful?

  10. Can the unloader valve, bypass hose, popoff valve be switched to the other side?

    1 answer

    1. The unloader valve and hose can be changed to the other side of the pump but new teflon tape will be needed.

      Helpful?

Accessories We Recommend

This is a carousel with auto-rotating slides. Activate any of the buttons to disable rotation. Use Next and Previous buttons to navigate, or jump to a slide with the slide dots.

See All Pressure Washer Pumps + Pump Oil
Cat Pumps Pressure Washer Pump Oil, 21 Oz.
5.0 out of 5 stars. 60 reviews

Cat Pumps Pressure Washer Pump Oil, 21 Oz.

Item # 22158

$16.99
See All Pressure Washer Pumps + Pump Oil
NorthStar Pressure Washer Pump Freeze Guard, 12 Oz.
4.7 out of 5 stars. 19 reviews

NorthStar Pressure Washer Pump Freeze Guard, 12 Oz.

Item # 1579000

$9.99
See All Ear Plugs + Dispensers
3M Reusable Corded Earplugs, NRR 25dB, Model# 90586-80000
3.8 out of 5 stars. 13 reviews

3M Reusable Corded Earplugs, NRR 25dB, Model# 90586-80000

Item # 174630

$2.99

Warranty

Manufacturer's Warranty

12 months parts/12months labor

Extend Your Warranty Coverage with a Northern Protection Plan (NPP)

Repair Plan — 1 Year

A Northern Protection Plan is available after adding the product to your shopping cart.

Recently Viewed Items

This is a carousel with auto-rotating slides. Activate any of the buttons to disable rotation. Use Next and Previous buttons to navigate, or jump to a slide with the slide dots.

Cat Pumps Pressure Washer Pump, 3500 PSI, 4.5 GPM, Belt Drive, Model# 5CP3120
4.8 out of 5 stars. 5 reviews

Cat Pumps Pressure Washer Pump, 3500 PSI, 4.5 GPM, Belt Drive, Model# 5CP3120

Item # A157304

$869.99