FAQ - TKL GROUP

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export@tkltruckparts.com; tuchunhui@163.com

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What are the main types of truck air dryers, and how do I choose?

The main types are:

Refrigerant Dryers: Most common, cool air to remove moisture.

Desiccant Dryers: Use absorbent media for extremely dry air, often in severe climates.

Membrane Dryers: For specialty applications.

Cartridge vs. Spin-on: Different maintenance styles.

Choice depends on your fleet size, climate, and maintenance preferences. Our guide on “truck air dryer types” can help.

What’s the difference between Type 20, Type 24, and Type 30 brake chambers?

These numbers refer to the effective diaphragm area in square inches. Type 20/24 are common for steering axles, while Type 30/36 provide more power for drive axles. Selecting the correct “brake chamber type” is critical for braking force and DOT compliance.

What is an AS-1138 slack adjuster, and how is it adjusted?

The AS-1138 is a manual slack adjuster standard. It’s adjusted by rotating its adjusting nut to set proper brake shoe-to-drum clearance. It requires regular manual inspection, unlike automatic slack adjusters.

I need bulk fan clutch suppliers for my fleet. Do you offer wholesale?

Yes, TKL Truck Parts is a leading supplier of fan clutches (both viscous and on/off types) from top brands. We offer competitive wholesale and fleet pricing for bulk purchases. Contact our sales team for a quote tailored to your fleet size.

Can part number 107430 be used on both steering and drive axles?

Part #107430 is a specific brake shoe or hardware kit. Its application is axle-specific based on size and design. Our product page lists all compatible axle positions and models—never interchange without verification.

What system does part 277148 belong to – braking, air processing, or cooling?

Part #277148 is commonly associated with truck air system components, often related to air dryer mounting brackets or coolant system fittings. Check the product category or description on our site for confirmation.

How often should I replace my truck’s air dryer cartridge?

Replacement intervals vary by “truck air dryer type” and operation. A general rule is every 1-2 years or 100,000-150,000 miles. Watch for signs like excessive purging, water in air tanks, or rising pressure drop.

Why is it important to use the correct slack adjuster (like AS-1138) for my brakes?

Using the correct slack adjuster ensures proper brake stroke and force translation. An incorrect type or length can cause under-braking, over-stroking, or uneven wear, leading to safety risks and failed inspections.

What is your trade term?

EXW, FOB, CFR, CIF.

What is your payment term?

T/T 30% as deposit, and 70% before delivery.

What is product lead time?

30-60 days after receiving deposit payment.

How do you pack the merchandise?

Standard export boxes. If you have specific requests, please tell us.

Can you produce according to the samples?

Yes. If you can provide samples, we will evaluate and discuss how to cooperate and develop new products.

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