Perkins Q574MX Main Bearing Kit for 4006-23TAG2 (A) & 4006-23TAG3 (A)

The Q574MX is a Perkins main bearing kit used in the crankshaft main bearing system of Perkins 4006 engines.It is commonly required when a 4006 engine is undergoing a major overhaul, crankshaft inspection, or main bearing replacement.For overhaul projects, selecting the correct bearing thickness is important. The required bearing should be confirmed according to the engine configuration and crankshaft condition rather than selecting by part number alone.

Q574MX is available in different thickness options:
Part Number  Thickness

Q574MX：     Standard
Q574M010X：  -0.010"
Q574M020X：  -0.020"

Important: Please confirm the required bearing thickness before ordering. If the crankshaft has been reground or the engine has previously used undersize bearings, the required bearing size may be different from the standard specification.

List of compatible engine models

The Q574MX main bearing kit is widely applicable to the following Perkins 4006 engine models:

KRP3122 is commonly listed as a STD (standard-size) main bearing kit. However, STD should not automatically be ordered simply because the engine model matches. During an engine overhaul, the crankshaft journals should be inspected and measured before the final bearing size is selected. If the crankshaft has already been ground, or if the main journals are outside the standard specification, a repair-size bearing may be required instead.

For a complete overhaul or repair project, we recommend confirming the exact engine nameplate and configuration before quotation.
Perkins Diesel Engine Parts

More Main Bearing in stock as below

ZEB Power offers main bearing for the Perkins 403, 404, 1103, 1104, 1106, 1204, 1306, 1506, 1706, 2206, 2506, 2806, 4006, 4008, 4012, and 4016 series, among others.
If you cannot find the main bearing you need in the list, please send us the engine nameplate or part number, and we will verify it for you.

Ensure Correct Perkins Bearing Kit Before Ordering

Selecting the wrong bearing kit may cause installation issues and unexpected downtime. Before quotation, our team verifies your engine information to ensure correct compatibility.

Verification includes:

✔ Engine serial number (ESN)
✔ Engine build list
✔ Existing part number (New number)
✔ Bearing specification

Q574MX for Perkins 4006 Engine Overhaul

For a complete Perkins 4006 overhaul, the main bearing kit is only one part of the required parts package. Depending on the engine condition, an overhaul may also require:
Connecting rod bearing, Piston rings,Cylinder liners,Pistons, Gasket set, Oil seals, Oil pump components, Water pump components, Filters and other engine-specific overhaul parts

If you have a complete overhaul requirement but do not have a parts list, send us the engine nameplate and part name
We can help check the required parts before quotation.

Perkins Engine Overhaul Parts

Why Buy Perkins 4006 Engine Parts from ZEB Power?

ZEB Power has supplied diesel engine parts since 2008, supporting customers with Perkins, CAT and Cummins engine parts for mining, construction, power generation and other industrial applications.
For Perkins 4006 parts, our focus is not only on supplying a part number but also on reducing the risk of ordering the wrong component.

Before Quotation

We check available engine information, part numbers and application details to identify the correct parts.

Before Shipment

We can provide product photos, quantity confirmation and packaging information for order verification.

For Overhaul Projects

If you have only an engine nameplate and part name but no complete parts list, we can help check the required parts according to the engine configuration.
This is particularly useful for customers preparing a Perkins 4006 engine overhaul and needing multiple parts from one supplier.

Procurement and Logistics

Genuine Perkins OEM parts supplied in partnership with an authorized Perkins first-tier distributor. Stock is sourced from Perkins warehouses in China, Singapore, and the United Kingdom, enabling competitive lead times across Africa, the South Amercia, Southeast Asia, and CIS markets. Original purchase invoices and certificates of authenticity available upon request.

Sourcing

· Genuine Perkins OEM · First-Tier Distributor Partner
· Warehouse locations: China · Singapore · United Kingdom

Lead Time

· Standard: 7–10 days from order confirmation
· Urgent orders: 3–5 days subject to warehouse stock availability
· Large volume orders: contact us to discuss dedicated stock arrangement

Trade Terms

· FOB · CIF · DDP · EXW
· Payment: T/T · L/C
· MOQ: 1 unit

Export Documentation

· Commercial Invoice · Packing List · Certificate of Origin
· Additional documentation requirements: notify us at time of inquiry

Warranty and After-Sales Service

Coverage

All parts carry a 12-month warranty from the date of shipment, covering manufacturing defects in materials and workmanship. Incorrect shipments (wrong part number or specification against confirmed order) are covered in full — replacement arranged at no additional cost with return freight covered by ZEB Power.

Exclusions

Warranty does not cover:
· Normal wear and tear under operating conditions
· Damage resulting from incorrect size selection or incompatible engine configuration
· Improper installation, including failure to observe Perkins specified torque values
· Use of non-recommended lubricants or contaminated oil
· Operation outside rated parameters

Claim Process

Contact us with ESN, Build List, installation date, and a description of the issue. Photo documentation of the failed part is required. Approved claims are fulfilled by replacement; return freight is covered by ZEB Power. Replacement is dispatched upon claim approval — typically within 5 working days of assessment.

Transit Damage Protocol

Inspect packaging upon receipt. If external packaging appears intact but internal damage is found upon unpacking, photograph both the packaging and the damaged part immediately and contact us within 48 hours of delivery (including weekends and public holidays). Cases of concealed transit damage are handled on a case-by-case basis — partial compensation or subsidized replacement will be arranged subject to photo evidence and carrier assessment.

FAQ

Q1: What engine does Perkins Q574MX fit?

Q574MX is a Perkins main bearing kit applicable to 4006-23TAG2 (A) and 4006-23TAG3 (A) engines.

Q2: Is Q574MX available in different sizes?

Yes. The Q574MX bearing family has different thickness options, including Q574MX standard, Q574M010X (-0.010"), and Q574M020X (-0.020").

Q3: What is the difference between Q574MX and Q574M010X?

Q574M010X has a -0.010" thickness specification, while Q574MX is the standard option.

Q4: What is Q574M020X?

Q574M020X is a Q574 bearing option with -0.020" thickness.

Q5: How can I confirm the correct bearing size?

Please provide the engine model and available engine identification information. If the crankshaft has been reground or previously repaired, the required bearing thickness should also be confirmed from the crankshaft measurement and engine service specifications.

Q6: Can you supply other Perkins 4006 overhaul parts?

Yes. We can help source other Perkins 4006 engine parts for overhaul and repair projects. Send us your part list, engine nameplate or engine identification details for checking.

Contact For Inquiry

To receive a quote, provide the following:
ESN (Engine Serial Number) · Part Number · Quantity required · Destination port and required documentation
Quote turnaround: within 24 hours.
Not sure of your Build List or crankpin condition? Send a photo of your engine nameplate and describe the symptoms — we will confirm the correct part and size for your engine.

ZEB Power — Diesel Engine Parts & Generator Set Solutions Since 2008

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