BENDIX TCH-003-046 User Manual

Technical Bulletin

Bulletin No: TCH-003-046 Effective Date: 2/25/04 Cancels: NA Page: 1 of 1

Subject:

Bendix® Commercial Vehicle Systems LLC is offering a "beaded" cap nut for QR-1C valves to enhance the double check valve's ability to seal at low differential pressures. The beaded cap nut is an enhancement to parking systems that use a QR-1C valve.

The new beaded cap nut is available in QR-1C valve assemblies or through a retrofit kit. Even though the beaded cap nut is interchangeable, Bendix recommends that the vehicle manufacturer be consulted before changing the cap nut of the QR-1C.

Valve Assembly

Bendix® QR-1C™ Quick Release and Double Check Valve Cap Nut

Standard

Identification Mark s

Service

Valve Assembly

with Standard

Cap Nut

Part Number Part Number Part Number (psi) Supply Delivery Balance

106899 108892 109089 289714 801125 289182 5011448 801366 0 1/4-18 1/4-18 1/4-18 109094 5011453 801371 5-8 3/8-18 3/8-18 1/4-18

800348 5003680 5008064 5011451 801369 1 max 1/4-18 3/8-18 1/4-18 5009069 5011452 801370 1 max 3/8-18 3/8-18 1/4-18 5009070 5011449 801367 1 max 1/4-18 1/4-18 1/4-18

with Beaded

Cap Nut

5011450

5011454

Replacement

Valve Assembly

with Beaded Cap

Nut

801368 0 1/4-18 3/8-18 1/4-18

801372 5-8 1/4-18 3/8-18 1/4-18

Differential Port Size

Beaded

Beaded Cap Nut Retrofit Kits – used to replace the cap nuts on existing valves

5011455 --- 1/4-18 --- --5011505 --- 3/8-18 --- ---