BENDIX TCH-001-050 User's Manual
Contents
1. Technical Bulletin Bulletin No TCH 001 050 Effective Date 10 31 02 Cancels N A Page 1 of 1 subject OVERRIDING THE D 2 GOVERNOR Tu Flo 750 D 2A Governor Bendix Tu Flo 550 and Tu Flo 750 compressors are designed to operate using Bendix D 2 or D 2A governors to maintain the correct air brake system pressure The governor controls when the compressor runs loaded building air mode or unloaded not building air mode In the unloaded mode part of the governor s function is to apply a controlled amount of pressure against the unloader pistons in the compressor head Use of non Bendix valves to override or instead of the Bendix D 2 governor can cause incorrect pressure to be applied to the unloader pistons and result in broken compressor inlet valves Broken inlet valves may puncture the compressor pistons forcing compressed air back into the compressor through the compressor flange and into the engine crankcase The installation of any valve to override the D 2 governor control is not recommended without prior Bendix approval We recommend using only genuine Bendix governors Reference Documents SD 01 333 Service Data Sheet for Tu Flo 550 compressor SD 01 344 Service Data Sheet for Tu Flo 750 compressor SD 01 503 Service Data Sheet for D 2 governor 2002 Bendix Commercial Vehicle Systems LLC Printed in U S A All rights reserved
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