Product Function & Specs:

121-1022 is identified by Caterpillar as a 3A diode with a 600V peak inverse voltage rating. A diode allows electrical current to flow primarily in one direction and can be used in electrical protection and circuit-control applications.

• Component Type: Diode
• Forward Current: 3 A
• Peak Inverse Voltage: 600 V
• Length: 1.65 in
• Width: 0.74 in
• Height: 0.53 in

Confirm the circuit location, diode polarity, and electrical specifications against the original component and applicable wiring diagram before installation.

Failure Symptoms:

• Electrical circuit does not operate correctly
• Repeated fuse failure or abnormal electrical protection activity
• Visible diode damage, overheating, or wiring-related faults

Quick Installation Notes:

• Confirm the machine number, circuit location, diode rating, and polarity before replacement.
• Disconnect the relevant electrical power supply and inspect the wiring and connectors.
• Install the diode in the correct orientation according to the wiring diagram and test the circuit afterward.

Maintenance Tips:

• Inspect wiring, connectors, and electrical terminals for corrosion or damage.
• Check for recurring circuit faults before replacing the diode repeatedly.
• Protect electrical components from moisture, contamination, and loose connections.

FAQ:

Q: What is Caterpillar 121-1022?

A: 121-1022 is a Caterpillar 3A diode with a 600V peak inverse voltage rating.

Q: What are the electrical specifications?

A: The listed specifications are 3A forward current and 600V peak inverse voltage.

Q: Which Caterpillar machines use this diode?

A: Caterpillar lists the diode across selected excavators, material handlers, mobile hydraulic power units, and other equipment. Confirm the machine number and electrical circuit before ordering.

Q: Is this an OEM or aftermarket replacement?

A: This product is supplied as a new aftermarket replacement. It is not represented as a genuine Caterpillar factory part.

Q: What should be checked before installation?

A: Check the diode rating, polarity, physical dimensions, wiring diagram, and original part identification. Follow the applicable Caterpillar electrical service procedure.

Why Sourcing From WinsParts?

WinsParts supports part-number and machine-configuration checks before quotation, helping parts dealers and repair workshops reduce ordering errors. Worldwide export and shipping coordination is available.

Product Function & Specs:

255-2966 is a Caterpillar air filter change indicator used to monitor air restriction in the air line between the air cleaner and turbocharger. The indicator helps identify when the air filter requires inspection or replacement.

• Type: Mechanical air filter change indicator
• Thread: 1/8-27 NPSF
• Pipe Connection: 1/8-27 NPT listed by Cat
• Lead Wires: 2
• Cover: Included in the Cat product description

Application coverage includes various Caterpillar excavators, mobile hydraulic power units, material handlers, compactors, and other equipment. Confirm the original component and machine configuration before ordering.

Failure Symptoms:

• Air filter restriction warning does not activate as expected
• Incorrect or inconsistent air filter restriction indication
• Damaged indicator housing, wiring, or threaded connection

Quick Installation Notes:

• Confirm the part number, thread specification, and connector or wire arrangement before removal.
• Clean the mounting area and prevent dirt from entering the air intake system.
• Install the indicator according to the applicable Caterpillar service procedure and check the warning function.

Maintenance Tips:

• Inspect the indicator and wiring during scheduled air intake system maintenance.
• Check the air filter and intake lines for excessive restriction, damage, or contamination.
• Replace damaged indicators and investigate abnormal restriction readings before continued operation.

FAQ:

Q: What is Caterpillar 255-2966?

A: 255-2966 is an air filter change indicator used to monitor air restriction in the air line between the air cleaner and turbocharger.

Q: What is the thread specification?

A: Cat lists a 1/8-27 NPSF thread, while the product title identifies a 1/8-27 NPT connection. Confirm the original connection specification before installation.

Q: Which Caterpillar machines use this part?

A: Listed applications include various 320D, 330D, 349D, 345C, and 336D models, along with other equipment. Compatibility should be confirmed using the machine serial number.

Q: Is this an OEM or aftermarket replacement?

A: This product is supplied as a new aftermarket replacement. It is not represented as a genuine Caterpillar factory part.

Q: What should be checked before installation?

A: Check the thread specification, wire arrangement, housing condition, and air intake connection. Follow the applicable service instructions for installation and function testing.

Why Sourcing From WinsParts?

WinsParts supports part-number and equipment-configuration checks before quotation, helping parts dealers and repair workshops reduce ordering errors. Worldwide export and shipping coordination is available.

Product Function & Specs:

301-6948 is identified by Caterpillar as a 100 mm outside diameter taper sleeve. The component is a flanged sleeve bearing used in the suspension frame area of the drive axle.

• Type: Flanged sleeve
• Material: Steel, low alloy steel
• Outside Diameter: Approximately 100 mm / 3.937 in
• Inside Diameter: Approximately 3.216 in
• Overall Length: 3.228 in
• Flange Diameter: 4.488 in
• Lip Thickness: 0.47 in
• Internal Groove: No
• External Groove: No
• Cross Holes: No

Failure Symptoms:

• Excessive movement or play in the suspension frame connection
• Abnormal wear or damage around the sleeve bearing mounting area
• Unusual noise or vibration from the drive axle suspension assembly

Quick Installation Notes:

• Confirm the part number, bearing dimensions, and machine configuration before removal.
• Inspect the mating bore, shaft, retaining components, and surrounding parts for wear or damage.
• Use suitable tools and follow the applicable Caterpillar service procedure for installation and alignment.

Maintenance Tips:

• Inspect the sleeve bearing and surrounding suspension components during scheduled maintenance.
• Check for abnormal play, wear marks, cracks, or deformation.
• Follow the applicable lubrication and inspection requirements for the suspension assembly.

FAQ:

Q: What is Caterpillar 301-6948?

A: 301-6948 is a 100 mm outside diameter taper sleeve, identified as a flanged sleeve bearing for the suspension frame in the drive axle.

Q: Is this an OEM or aftermarket replacement?

A: This product is supplied as a new aftermarket replacement. It is not represented as a genuine Caterpillar factory part.

Q: Which Caterpillar machines use this part?

A: Caterpillar lists applications including 735B, 735C, 740, 740B, 740C, 740 GC, 745, and 745C articulated trucks, as well as 740 and 740B ejector trucks. Confirm the machine serial number before ordering.

Q: What dimensions should be checked before installation?

A: Confirm the outside diameter, inside diameter, overall length, flange diameter, and lip thickness against the original component and service documentation.

Q: Can I purchase this part in bulk?

A: Yes. WinsParts supports wholesale enquiries for parts distributors and repair workshops. Contact us for bulk quotation and shipping coordination.

Why Sourcing From WinsParts?

WinsParts supports part-number and equipment-configuration checks before quotation, helping parts dealers and repair workshops reduce ordering errors. Worldwide export and shipping coordination is available.

Product Function & Specs:

251-0580 is a Caterpillar console wiring harness used to route electrical power and signals between relevant console-mounted electrical circuits. Cat describes this harness as including terminals for connecting electronic pump control ground. The exact connector arrangement and circuit configuration should be verified against the applicable machine wiring diagram.

Failure Symptoms:

• Intermittent electrical operation or signal interruption
• Visible wire insulation, terminal, or connector damage
• Electrical faults associated with console-mounted circuits

Quick Installation Notes:

• Disconnect the applicable electrical power supply before beginning installation.
• Compare the harness routing, terminals, and connectors with the machine wiring diagram.
• Secure the harness correctly and check for interference, loose connections, or exposed wiring.

Maintenance Tips:

• Inspect wiring insulation and connectors for wear, corrosion, and physical damage.
• Keep harness routing clear of excessive heat, abrasion, and moving components.
• Investigate recurring electrical faults before replacing additional components.

FAQ:

Q: What is part number 251-0580?

A: It is a Caterpillar console wiring harness with terminals used for relevant electrical connections, including electronic pump control ground.

Q: Which Caterpillar machines are associated with this harness?

A: Cat lists applications including 320D, 330D, 345D, 349D, and 336D. Confirm the machine serial number and harness configuration before ordering.

Q: Is this an OEM or aftermarket replacement?

A: This page describes a new aftermarket replacement. Genuine OEM status has not been verified.

Q: Are the connector and terminal specifications confirmed?

A: The exact connector and terminal configuration has not been independently verified. Compare the replacement harness with the original part and applicable wiring diagram.

Q: Can I purchase this harness in bulk?

A: Yes. Contact WinsParts for wholesale enquiries and application verification.

Why Sourcing From WinsParts?

WinsParts supports part-number and application checking to help parts distributors and repair workshops reduce ordering errors.

Product Function & Specs:

343-2873 is a plastic straight bellow seal used in the front suspension frame of selected Caterpillar articulated and ejector trucks. The seal helps protect the associated assembly from external contamination. Caterpillar lists an inside diameter of 5.94 inches, an outside diameter of 9.7 inches, and a width of 2.56 inches.

Failure Symptoms:

• Cracking, splitting, or visible deterioration of the bellow seal
• Contamination entering the protected suspension-frame area
• Loose, damaged, or displaced seal around the mounting area

Quick Installation Notes:

• Inspect the mounting area and remove accumulated dirt before installation.
• Confirm the seal dimensions and mounting configuration against the applicable parts diagram.
• Ensure the bellow seal is correctly positioned and securely seated after installation.

Maintenance Tips:

• Inspect the bellow seal periodically for cracks, cuts, and deformation.
• Keep the surrounding suspension-frame area clean during routine maintenance.
• Replace damaged seals promptly to help limit contamination of protected components.

FAQ:

Q: What is part number 343-2873?

A: It is a Caterpillar plastic straight bellow seal for front suspension frame applications.

Q: Which machines use this bellow seal?

A: Caterpillar lists applications including 735C, 740C, 745C, 740 GC, 735B, and 740B. Confirm the machine configuration before ordering.

Q: What are the listed dimensions?

A: The published dimensions are 5.94 inches inside diameter, 9.7 inches outside diameter, and 2.56 inches width.

Q: Is this an OEM or aftermarket replacement?

A: This page describes a new aftermarket replacement. Genuine OEM status has not been verified.

Q: Can I purchase this seal in bulk?

A: Yes. Contact WinsParts for wholesale enquiries and application verification.

Why Sourcing From WinsParts?

WinsParts supports part-number and application checking to help parts distributors and repair workshops reduce ordering errors.

Product Function & Specs:

The 238-2210 is a Caterpillar rocker switch assembly used for the lower windshield-washer function. Caterpillar identifies it as a 24 V sealed three-position rocker switch with a pigtail connector. The switch uses the windshield-washer symbol and has a 100 mm pigtail connector length.

Failure Symptoms:

• Lower windshield-washer function does not operate
• Intermittent switch operation
• Electrical response is absent when the rocker switch is operated

Quick Installation Notes:

• Switch off electrical power before removing the existing rocker switch.
• Inspect the connector, terminals, and panel cutout before installing the replacement switch.
• Connect the pigtail correctly and test the washer function after installation.

Maintenance Tips:

• Keep the switch and surrounding panel area clean and dry.
• Inspect the connector and wiring for looseness, corrosion, or damage.
• Check washer-switch operation during routine electrical-system inspection.

FAQ:

Q: What is Caterpillar 238-2210?

A: 238-2210 is a Caterpillar rocker switch assembly for the lower windshield-washer function.

Q: What voltage is the 238-2210 switch?

A: Caterpillar identifies the switch as a 24 V rocker switch.

Q: Which Caterpillar machines use 238-2210?

A: Caterpillar’s parts listing includes numerous applications, including 320D, 323D, 336D, 349D, 312D, 318E, and 345D. Confirm the machine configuration before ordering.

Q: What type of connector does this switch use?

A: Caterpillar specifies a sealed three-position rocker switch with a 100 mm pigtail connector.

Q: Is 238-2210 an OEM or aftermarket replacement?

A: The product offered by WinsParts is a new aftermarket replacement for Caterpillar part number 238-2210. Application should be verified before installation.

Why Sourcing From WinsParts?

WinsParts supports part-number and application verification before quotation, helping dealers and repair workshops confirm electrical components against the required Caterpillar machine configuration.

Product Function & Specs:

The 324-4128 is a Caterpillar coolant temperature regulator used in the engine cooling system and water-line group. It restricts coolant flow between the engine block and radiator until the engine reaches its operating temperature. Cat lists a height of 2.44 inches, diameter of 2.87 inches, and carbon steel material for this part.

Failure Symptoms:

• Engine temperature remains below the expected operating range
• Engine temperature rises excessively during operation
• Coolant temperature fluctuates abnormally

Quick Installation Notes:

• Allow the cooling system to cool before removing the existing temperature regulator.
• Clean and inspect the regulator housing and gasket sealing surfaces before installation.
• Refill and bleed the cooling system according to the applicable Caterpillar service procedure, then check for coolant leakage.

Maintenance Tips:

• Maintain the specified coolant level and coolant condition.
• Inspect the cooling system for leaks during scheduled maintenance.
• Monitor engine coolant temperature for changes from normal operating behavior.

FAQ:

Q: What is Caterpillar 324-4128?

A: 324-4128 is a Caterpillar coolant temperature regulator used in water-line and engine cooling-system applications.

Q: Which engines use 324-4128?

A: Public parts listings associate this part with Caterpillar 3066, C6.4, and C4.2 engine applications.

Q: Which Caterpillar machines use this regulator?

A: Cat lists applications including 320D, 312D, 323D, 311D LRR, 313D, and 319D L. Confirm the machine configuration and serial number before ordering.

Q: What are the published dimensions?

A: Caterpillar lists a height of 2.44 inches and diameter of 2.87 inches. Cat also identifies carbon steel as the material.

Q: Is 324-4128 an OEM or aftermarket replacement?

A: The product offered by WinsParts is a new aftermarket replacement for Caterpillar part number 324-4128. It should be matched against the required machine and serial-number application before installation.

Why Sourcing From WinsParts?

We support part-number and application verification before quotation, helping dealers and repair workshops confirm the required cooling-system component for their Caterpillar equipment.

Product Function & Specs:

238-2209 is a lower wiper rocker switch used for electrical control of the lower window wiper. Caterpillar identifies the component as a Lower Wiper Rocker Switch, and its published specification lists ABS plastic material. Correct connector and switch configuration should be confirmed before installation.

Failure Symptoms:

• Lower window wiper does not respond to switch operation.
• Intermittent wiper operation during machine use.
• Wiper control response is lost or inconsistent.

Quick Installation Notes:

• Disconnect battery power and inspect the switch connector and related wiring before removal.
• Confirm the replacement switch, connector layout, and mounting position before fitting.
• Reconnect the electrical system and test the lower wiper through its normal operating functions.

Maintenance Tips:

• Monitor the switch and connector for corrosion or physical damage.
• Keep electrical connections clean and protected from moisture.
• Investigate repeated wiper circuit faults before replacing the switch again.

FAQ:

Q: Can this part replace OEM 238-2209?

A: Yes. It is offered as an aftermarket replacement for the referenced part number. Confirm the machine or serial number before ordering.

Q: Is this an OEM or aftermarket replacement?

A: It is a new aftermarket replacement intended for heavy machinery service. Product configuration and application should be confirmed before ordering.

Q: Which machines are compatible?

A: Caterpillar lists 238-2209 for models including 320D, 312D, 330D, 311D LRR, 318E L, 349D L, and 336D. Send the machine serial number (PIN) for final fitment checking.

Q: What should be verified before fitting this electrical switch?

A: Confirm system configuration, connector layout, terminal arrangement, mounting position, and the condition of related wiring before installation.

Q: Can I purchase in bulk?

A: Yes. We support wholesale enquiries for parts dealers and repair workshops. Contact us for bulk pricing and international shipping options.

Why Sourcing From WinsParts?

We support part-number checking before quotation and can review machine model and serial-number details to reduce ordering errors.

Product Function & Specs:

The 227-7575 is identified by Caterpillar as a Panel Assembly-Switch and described as a Cat control panel assembly. It provides operator access to applicable equipment functions through buttons and manual controls. Caterpillar lists a 24 V rated voltage, 18–32 V operating voltage, ABS plastic body panel, and integral 12-pin and 18-pin connectors. :contentReference[oaicite:0]{index=0}

Failure Symptoms:

• One or more panel-operated functions fail to respond.
• Intermittent operation of switches or controls on the panel.
• Visible damage or deterioration of the panel assembly or connectors.

Quick Installation Notes:

• Disconnect battery power before removing the existing switch panel assembly.
• Inspect the 12-pin and 18-pin connectors, terminals, wiring, and mounting points before installation.
• Reconnect the panel and verify the applicable switch functions after installation.

Maintenance Tips:

• Keep the panel and electrical connectors clean and protected from contamination.
• Inspect connectors and related wiring for corrosion, looseness, or damage.
• Investigate repeated switch or control faults before replacing the panel assembly.

FAQ:

Q: Can this part replace 227-7575?

A: It is offered as a new aftermarket replacement for the referenced part number. Confirm the machine configuration before ordering.

Q: Is this an OEM or aftermarket replacement?

A: It is a new aftermarket replacement intended for heavy machinery electrical-system service. Product configuration and application should be confirmed before ordering.

Q: Which Caterpillar machines use 227-7575?

A: Caterpillar lists applications including 320D, 330D, 336D, 325D, 324D, 329D, 345D, and 349D, among many other models. Confirm the machine serial number before ordering. :contentReference[oaicite:1]{index=1}

Q: What electrical specifications should be checked?

A: Caterpillar lists 24 V rated voltage, 18–32 V operating voltage, and integral 12-pin and 18-pin connectors. Confirm the machine wiring configuration before installation. :contentReference[oaicite:2]{index=2}

Q: Can I purchase in bulk?

A: WinsParts supports wholesale enquiries for parts dealers, distributors, and repair workshops.

Why Sourcing From WinsParts?

WinsParts helps dealers and workshops confirm part numbers, product configuration, and application details before shipment.