Sourcing Guide
Product spotlight for OTX coolant filter assembly TC 00003LZ, TC 00004LZ and TC 0001ZC-01, with WF reference clues, thread notes and inquiry matching checklist.
Coolant filter assemblies are small parts in the cooling system, but a wrong replacement can delay a repair just like a wrong fuel filter or brake part. This product spotlight covers OTX coolant filter assembly catalog codes TC 00003LZ and TC 00004LZ, together with TC 0001ZC-01, for buyers who need to confirm the correct water filter assembly before quotation.
The visible structure is a cast aluminum assembly with a rectangular mounting base, bolt holes, a cylindrical filter head, a round front connection and a side plug. Because the housing, thread and mounting direction matter, these items should be checked by code, WF reference, thread clue and old-part photo instead of by a broad truck name only.
The current catalog data gives three useful OTX codes in this coolant filter assembly direction. Treat these clues as a starting point for matching, then confirm with photos and measurements:
| Catalog Code | Reference / Model Clue | Thread or Size Clue | What to Confirm |
|---|---|---|---|
| TC 00003LZ | WF2073 | 80 x 58; 11/16"-16 | Check the front connection, side plug and mounting base against the old assembly. |
| TC 00004LZ | Aowei coolant filter clue | 89 x 62; 11/16"-16; M12 x 1.5 | Confirm the thread and secondary connection before quotation. |
| TC 0001ZC-01 | WF2051 coolant filter assembly | Confirm by sample or old-part photo | Use the number marking and housing shape to separate it from similar assemblies. |
A catalog code is useful, but the same buyer may also send a partial WF reference, a photo of the removed unit or only a truck maintenance list. For coolant filter assemblies, the mounting base, bolt-hole position, thread, side plug and filter-head direction can be just as important as the printed number.
If the truck has several model generations in the market, the old part photo becomes especially important. One clear front photo is not enough. Send the front, side, bottom mounting base, thread area and any package or label marking so the replacement direction can be checked with less back-and-forth.
For a quotation request, include the catalog code if known, the WF reference or old number, truck model if confirmed, quantity, photos of the old assembly and any size or thread information. If you are unsure whether the truck model name is correct, send the photo first and mark the model as unconfirmed.
For distributor stock planning, separate confirmed items from items that still need checking. Confirmed codes can be quoted faster, while uncertain items can be matched by photo, sample, thread and mounting direction. This keeps the inquiry practical without creating separate unclear requests for every small part.
Coolant filter assemblies can be checked together with oil filters, fuel filters, filter bases, air filter assemblies, brake parts and other maintenance items. Many buyers do not need one product to fill a full container. A mixed order with several regular service parts is often more practical for importers, fleets, workshops and wholesalers.
Browse the coolant filter assembly category or send an inquiry with the code, WF reference, old-part photos and mixed order plan. We can help compare the available replacement direction before quoting.
Use this guide to organize a clearer quote request instead of choosing from a short product list.
Part number, truck brand, model, engine model, chassis number and old-part photos help confirm the correct replacement before quotation.
Filters, brake parts, clutch parts, chassis parts, cab parts, bearings, sensors and assemblies can be checked together for one practical order.
Share quantity, packing preference and whether the order is for fleet repair, workshop use or distributor stock.
Continue by brand, model or part system when the inquiry needs more specific matching clues.
Send part numbers, truck models, chassis numbers, old-part photos or sample photos. We can help check multiple items and combine them into a practical export order.