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How To Find The Correct Pulley Kit

June 19, 2017

HOW TO FIND THE CORRECT PULLEY KIT FOR YOUR KSI OR CSI GENERATOR

 

Pulley kits can be confusing and difficult to determine which one is correct for your generator.  The KSI and CSI generators use an aluminum idler pulley.  The idler pulley is what the blower fan is mounted to.  Please note, on some units, Power Tech installed a fan clutch.  Please click here to get more information on the fan clutch assembly.

WHY DO YOU NEED TO REPLACE YOUR PULLEY SYSTEM?

There are a few reasons why it might be time to replace your pulley kit.  In most cases, it’s one of two reasons.  One reason is your bearings have failed within the idler pulley.  This would cause your blower fan to shake and create vibration due to it becoming unbalanced.  Another reason why your pulley kit would need to be replaced is over time your aluminum idler pulley wears in the center where the belt rides.  You’ll notice the belt is slipping and your blower fan isn’t engaging to blow air.  As a result, your generator will overheat and activate the high temperature switch and shutdown.

NOW THAT YOU KNOW YOUR PULLEY KIT HAS FAILED, WHICH KIT DO YOU NEED?

KSI and CSI generator pulleys were modified and often updated over the years to better improve the generator’s cooling system.  Because of the modifications, it can be difficult to find the correct pulley kit for your generator.  Pulley kits are sold with the blower fan and without the blower fan.  Often times the fan is damaged when the pulley fails and is always a good idea to replace it when replacing the pulleys.  

Here are a few things you’ll need to know before purchasing your pulley kit. 

  •  Identify the generator model
  • Remove and measure the center mounting hole on the blower fan.
  •  Measure the diameter of the water pump pulley.

IDENTIFY THE GENERATOR MODEL

There’s a difference between the CSI and KSI models.  The KSI generators use a Kubota diesel engine to power the generator and the CSI generators (discontinued model) used a Caterpillar diesel engine to power the generator.  Both models are available in 8, 10, and 12 KW sizes.  If you're looking at your Power Tech serial number, KSI serial numbers start with a K and CSI serial numbers start with a C. Below, you'll see a more in depth breakdown on Power Tech serial numbers.

 
KSI MODEL SERIAL NUMBERS

Example of a KSI Serial Number:  KNM21DDD1234

The first letter in the serial number represents the engine type.  For all KSI model generators, it will start with a "K" for Kubota.  The second letter in the serial number represents the engine model.  This may vary depending on the KW size of the generator.  "N" represents the Kubota D1105 and "J" represents the Kubota D1505.  The Third letter in the serial number represents the generator end used on the generator.  "C" represents Colussium and "M" represents Marathon.  

To breakdown the serial number in the example above:

K = Kubota
N = D1105
M = Marathon Generator End

CSI MODEL SERIAL NUMBERS

Example of a CSI Serial Number:  CAM21DDD1234

The first letter in the serial number represents the engine type.  For all CSI model generators, it will start with a "C" for Caterpillar.  The second letter in the serial number represents the engine model.  This may vary depending on the KW size of the generator.  "A" represents the Caterpillar 3011 and "B" represents the Caterpillar 3013.  The Third letter in the serial number represents the generator end used on the generator.  "C" represents Colussium and "M" represents Marathon.  

To breakdown the serial number in the example above:

C = Caterpillar
A = 3011
M = Marathon Generator End

REMOVE AND MEASURE THE CENTER MOUNTING HOLE ON THE BLOWER FAN

 

By removing the blower fan from the generator, you will be able to take an accurate measurement of the center mounting hole on the blower fan.  The measurement will read 2 1/2 inches or 4 3/4 inches in diameter.  Power Tech’s current KSI pulley setup is 4 3/4 inches on the blower fan mounting hole.  If you have the 2 1/2 inch fan setup, it can be upgraded to the 4 3/4 inch mounting style if you purchase the pulley kit with the fan included.  

NOTE: When installing this upgrade, you’ll need to cut the shroud for fan clearance.

MEASURE THE DIAMETER OF THE WATER PUMP PULLEY

When purchasing a pulley kit, belt sizes can be an issue.  The belts that are included in the pulley kit are determined by the size of the idler pulley and the water pump pulley.  In each kit description, you’ll see a reference to the diameter of the water pump pulley.  To reassure that you’re ordering the correct kit, please take the measurement of the diameter of the water pump pulley.  

Water Pump Pulleys

Power Tech Mobile Generator Water Pump Pulleys Replacement water pump pulleys for Power Tech Generators.

Water Pump Pulley for an 05 Kubota Engine.

$32.95

Water Pump Pulley for the CD7000 and CD8000 generators. This pulley fits the 05 Kubota generators with the 3 1/4 in. diameter pulley. PT# 03PFCD8 (3 1/4 in. diameter). PT# 03PFD905 (3 7/8 in. diameter).

Water Pump Pulley 3 1/4" - 03PDRFAN-3011

$63.95

Power Tech Mobile Generator Water Pump Pulley 3 1/4" Replacement water pump pulley for the 8-12 KW CSI quiet diesel generators. This pulley is 3 1/4" in diameter. Finding what engine is on your Power Tech generator. Powe ...

Water Pump Pulley 3 7/8" - 03PDRFAN-L

$73.95

Power Tech Mobile Generator Water Pump Pulley 3 7/8" Replacement water pump pulley for the 8-12 KW KSI quiet diesel generators. This pulley is 3 7/8" in diameter. Finding what engine is on your Power Tech generator. Powe ...

Water Pump Pulley - 3"

$72.95

Power Tech Mobile Generator Water Pump Pulley 3" Replacement water pump pulley. This pulley is 3 inches in diameter. The 3 inch water pump pulley is commonly used on an 05 Kubota engine. In addition, this is a common pul ...

KSI Pulley Kits

Power Tech Mobile Generator KSI Pulley Kits Replacement Pulley Kits for Power Tech's KSI model quiet generator. These pulleys are only available as a kit. The reason behind this kit is these pulleys come pre-pressed with the two bearings and the shaft installed in the pulley. This is a difficult process that maybe unachievable without the proper tools and knowledge. There are many options when it comes to KSI Pulley Kits. Please check all the descriptions before choosing your pulley kit. Tech Ti ...

12 KSI Pulley Kit

$376.95

Kubota Quiet Diesel 12 KSI Generator Idler Pulley Kit Power Tech Mobile Kubota quiet diesel 12 KSI generator replacement idler pulley kit. This kit includes the water pump pulley, two belts, bolts, washers, and the Idler ...

8 KSI Pulley Kit - 09PKIT8KSI-2

$501.95

Kubota Quiet Diesel 8 KSI Generator Idler Pulley Kit Power Tech Mobile Kubota quiet diesel 8 KSI generator replacement idler pulley kit. This kit includes the 3 inch water pump pulley, two belts, bolts, washers, and the ...

8 KSI Kubota Pulley Kit with Fan

$675.95

Power Tech Mobile Quiet Generator Idler Pulley Kit with Fan Replacement idler pulley it for the 8 KW KSI model quiet generator. This kit includes the blower fan, Idler pulley kit, 3" water pump pulley, two belts, and all ...

Kubota Quiet Diesel 8-12 KSI Generator Pulley Kit

$376.95

Kubota Quiet Diesel 8-12 KSI Generator Pulley Kit Power Tech Mobile Kubota quiet diesel 8-12 kW KSI replacement pulley kit. This kit features the 2.5" fan mounting hub. The 09PKIT pulley kit is the replacement for KSI mo ...

8-12 KSI Generator Pulley Kit For Units with Alternators (2.5" Hub)

$376.95

Kubota Quiet Diesel 8-12 KSI Generator Pulley Kit Power Tech Mobile Kubota quiet diesel 8-12 KW KSI replacement pulley kit. This kit features the 2.5" fan mounting hub. The 09PKITAB pulley kit is the replacement for KSI ...

8-12 KSI Pulley Kit for Alternator Option

$376.95

Kubota Quiet Diesel 12 KSI Generator Idler Pulley Kit Power Tech Mobile Kubota quiet diesel 8-12 KSI generator replacement idler pulley kit. This kit is designed for the KSI model with the engine alternator. Please check ...

CSI Pulley Kit

Power Tech Mobile Generator CSI Pulley Kits Replacement Pulley Kits for Power Tech's CSI Caterpillar model quiet generator. These pulleys are only available as a kit. The reason behind this kit is these pulleys come pre-pressed with the two bearings and the shaft installed in the pulley. This is a difficult process that maybe unachievable without the proper tools and knowledge. Do you have a KSI with a Kubota engine? Click Here. Tech Tip: Notice your belts are loose on your CSI pulleys? Over tim ...

8 CSI Caterpillar Pulley Kit 4.75"

$660.95

Quiet 8KW CSI Generator Caterpillar Idler Pulley Kit Power Tech mobile diesel generator 8 CSI replacement idler pulley kit with the 4 3/4 inch mounting pulley. This kit includes the water pump pulley, two belts, bolts, w ...

8 CSI Pulley Kit - 09PKIT-8CSI

$376.95

Caterpillar Quiet Diesel 8 CSI Generator Pulley Kit Power Tech Mobile Caterpillar quiet diesel 8 CSI replacement pulley kit. This kit features the 2.5" fan mounting hub. This kit includes the water pump pulley, two belts ...

Truck Mounted 8 CSI Caterpillar Pulley Kit

$376.95

Truck Mounted Caterpillar Quiet Diesel 8 CSI Generator Pulley Kit Power Tech mobile truck mounted Caterpillar quiet diesel 8 CSI replacement pulley kit. This kit is specifically for the semi-truck application. This kit f ...

This blog was provided by:

Jim Spears
Parts Sales/Marketing

Direct Desk:  352-435-4418
Email Jim by CLICKING HERE