ATD Tools Model 356 HNBR O-Ring Assortment User Manual
For R-12 and R-134a Automotive A/C Systems
1. پراڊڪٽ ختمview
The ATD Tools Model 356 is a 270-piece assortment of HNBR (Highly Saturated Nitrile Butyl Rubber) O-rings designed for use in automotive air conditioning systems. This kit provides a comprehensive selection of O-rings compatible with both R-12 and R-134a refrigerants, ensuring reliable sealing for various A/C components. The O-rings are organized in a durable plastic storage case for easy identification and access.

This image displays the ATD Tools Model 356 O-Ring Assortment, featuring 270 green HNBR O-rings organized by size within a transparent plastic storage case. Several O-rings are also shown outside the case, highlighting their distinct green color and various dimensions.
2. تياري ۽ سيٽ اپ
Proper preparation is crucial for effective O-ring sealing and longevity.
- او-رنگز جو معائنو ڪريو: Before installation, carefully inspect each O-ring for any visible defects such as cuts, nicks, or deformities. Discard any damaged O-rings.
- صاف سطحون: Ensure that all mating surfaces where the O-ring will be seated are clean, dry, and free from debris, old gasket material, or corrosion. Use a suitable cleaner if necessary.
- لوڻ: Apply a thin, even coat of an appropriate O-ring lubricant (compatible with HNBR and your A/C system's refrigerant and oil) to the O-ring. This aids in installation, reduces friction, and helps prevent damage during assembly.
3. Operating Instructions (Installation)
Follow these steps for correct O-ring installation:
- صحيح سائيز چونڊيو: Refer to your vehicle's service manual or the component specifications to determine the exact O-ring size required for the application. The assortment provides a variety of sizes to match common automotive A/C fittings.
- Position O-ring: Carefully place the lubricated O-ring into its groove. Ensure it is seated evenly and not twisted or stretched excessively.
- اجزاء کي گڏ ڪرڻ: Bring the mating components together smoothly, taking care not to pinch or roll the O-ring.
- بندن کي مضبوط ڪريو: Tighten fasteners to the manufacturer's specified torque settings. Overtightening can compress the O-ring beyond its elastic limit, leading to premature failure and leaks. Undertightening can result in insufficient sealing.
- ليڪ ٽيسٽ: After installation, perform a leak test on the A/C system using appropriate equipment to confirm the integrity of the new seals.
4. مينٽيننس ۽ اسٽوريج
To ensure the longevity and effectiveness of your O-rings, proper maintenance and storage are essential.
- اسٽوريج: Store unused O-rings in their original plastic case, away from direct sunlight, extreme temperatures, and harsh chemicals. HNBR O-rings are UV resistant, but prolonged exposure can still degrade the material over time.
- صفائي: Keep the storage case clean and free from dirt or contaminants that could transfer to the O-rings.
- سنڀالڻ: Handle O-rings with clean hands or gloves to avoid transferring oils or debris that could compromise their sealing ability.
5. مسئلا حل ڪرڻ
If a leak occurs after O-ring installation, consider the following common issues and solutions:
- غلط سائيز: Ensure the O-ring used matches the exact specifications for the application. An O-ring that is too small will stretch and thin, while one that is too large may not seat properly or become pinched.
- غلط انسٽاليشن: The O-ring may have been twisted, pinched, or rolled during assembly. Disassemble, inspect the O-ring for damage, and reinstall carefully.
- Damaged O-ring: Even new O-rings can sometimes have manufacturing defects or be damaged during handling. Re-inspect the O-ring for any nicks, cuts, or flat spots. Replace if damaged.
- مٿاڇري جون خاميون: Check the mating surfaces for scratches, burrs, or corrosion that could prevent a proper seal. Address any surface issues before reinstallation.
- Overtightening: Excessive torque can deform the O-ring, leading to a leak. Always adhere to manufacturer torque specifications.
6. وضاحتون
| خاصيت | تفصيل |
|---|---|
| برانڊ | اي ٽي ڊي اوزار |
| ماڊل نمبر | 356 |
| مواد | HNBR (Synthetic Rubber) |
| مطابقت | R-12 and R-134a Refrigerants |
| س Piو ٽڪرو | 270 |
| پيڪيج جي ماپ | 21.336 سينٽي ايل x 10.16 سينٽ W x 3.302 سينٽي ايڇ |
| شيءِ جو وزن | 4.8 اونس |
| رنگ | Green (with possible Black variant) |
Assortment Contents (Quantity and Size):
- 20 pieces: 7/32" x 1/16"
- 20 pieces: 1/4" x 1/16"
- 20 pieces: 6.8 x 1.9 mm
- 20 pieces: 5/16" x 1/16"
- 20 pieces: 7.8 x 1.9 mm
- 20 pieces: 8 x 2 mm
- 20 pieces: 8.8 x 1.9 mm
- 15 pieces: 7/16" x 1/16"
- 15 pieces: 7/16" x 3/32"
- 15 pieces: 11 x 2 mm
- 15 pieces: 12 x 2 mm
- 10 pieces: 13.9 x 1.8 mm
- 10 pieces: 9/16" x 3/32"
- 10 pieces: 14 x 2 mm
- 10 pieces: 15 x 2 mm
- 10 pieces: 17 x 2 mm
- 10 pieces: 11/16" x 1/16"
- 15 pieces: 11/16" x 1/8"
7. وارنٽي ۽ سپورٽ
For information regarding product warranty, returns, or technical support, please contact ATD Tools directly through their official webسائيٽ يا ڪسٽمر سروس چينلز. خريداري جي ثبوت طور پنهنجي خريداري جي رسيد رکو.
Note: This manual provides general guidelines. Always refer to your vehicle's specific service manual for detailed repair procedures and torque specifications.





