PRODUCTS
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1. Application & Related Brake Parts
The Sinotruk HOWO Z3 Old Type Air Disc Brake Caliper Assembly is a replacement component for compatible Sinotruk heavy-duty truck pneumatic disc brake systems.
The caliper transfers mechanical force from the air brake chamber to the brake pads, pressing them against the rotating brake disc to generate the friction required for vehicle braking.
The old type Z3 configuration is intended for matching earlier brake caliper systems. Its internal components, mounting structure and adjustment mechanism must correspond to the original assembly.
Related components include brake discs, brake pads, brake chambers, caliper carriers, brake pistons, adjustment mechanisms, guide pins and brake caliper repair kits.
2. Fitment Confirmation Before Order
Buyers should confirm the original Sinotruk Z3 brake model, installation position and caliper structure before purchasing.
Important specifications include brake disc diameter, disc thickness, brake pad shape, caliper mounting hole spacing, air chamber interface and internal adjustment mechanism.
Old type and new type Z3 brake caliper assemblies should not be considered interchangeable without confirming their specifications.
Please also confirm whether the order requires the complete brake caliper assembly, caliper body, mounting carrier or internal repair components.
3. Suitable Buyer & Supply Use
This product is suitable for truck parts importers, wholesalers, brake repair workshops, fleet maintenance companies and aftermarket distributors.
WOPU supports combined purchasing of Z3 disc brake calipers, caliper half assemblies, brake pistons, adjustment mechanisms, brake pads, brake discs and other compatible Sinotruk braking system components.
Our advantages include:
Full range heavy-duty truck spare parts supply
Support for bulk wholesale and mixed container orders
Part number, photo and sample confirmation service
Neutral package and customized package available
Export experience for Africa, Middle East, South America, Southeast Asia and Central Asia
Flexible shipping solutions by express, air and sea
Long-term cooperation support for importers, wholesalers, repair shops and fleet maintenance buyers



------>Q1. How can I confirm the correct truck parts before ordering?
Please provide the part number, truck model, axle model, engine model or transmission model. If the part number is unavailable, you can send us product photos, dimensions, nameplate information or samples. Our team will check the details with you before confirming the order to reduce matching errors.
------>Q2. Can I purchase different truck parts in one order?
Yes. WOPU supplies a wide range of heavy-duty truck parts, including axle, chassis, transmission, engine and cab components. We support mixed-product orders and consolidated shipments, helping repair shops, wholesalers and importers reduce purchasing time, shipping costs and supplier management work.
------>Q3. What is your minimum order quantity?
The MOQ depends on the product type, weight, packaging method and stock availability. Small trial orders are available for many stocked items, while more competitive pricing can be offered for wholesale and container orders. Please send us your purchasing list for a detailed proposal.
------>Q4. How do you control product quality?
We check key specifications, dimensions, materials, appearance and packaging according to the requirements of each product. Photos or videos can be provided before shipment when required. For large or customized orders, samples can also be confirmed before batch production.
------>Q5. Can you provide samples before a bulk order?
Yes, samples are available for many products. If the item is in stock, we can arrange it after confirming the sample and courier costs. For customized products, sample preparation time and charges will be evaluated according to the drawing, sample or technical requirements.
------>Q6. Do you support OEM, ODM and customized packaging?
Yes. We support product development based on samples or drawings, as well as customized dimensions, materials, markings, labels and packaging. WOPU packaging, neutral packaging and authorized customer-brand packaging are available according to order quantity and product requirements.
------>Q7. How do you quote prices, and what payment terms do you accept?
Prices are calculated according to the part number, quantity, quality level, packaging and delivery terms. A detailed quotation will be provided after we review your purchasing list. Common payment methods include T/T and L/C, with payment terms confirmed according to the order value and cooperation conditions.
------>Q8. What are your delivery and after-sales arrangements?
Delivery time depends on stock availability, order quantity and customization requirements. We can arrange consolidated shipment through Qingdao, Tianjin, Shanghai or Guangzhou. If any product issue occurs, please provide photos, videos, quantities and package labels, and our team will review the case and offer an appropriate solution.
To learn more about our products, please leave your email and we will contact you within 24 hours.



