rustydog Posted August 12, 2014 Share Posted August 12, 2014 ARE THE TU-FLO 500 AND 501 COMPRESSORS INTERCHANGEABLE?? MY B HAS 500...LEAKING COOLANT,(SLIGHTLY)...C0ST OF 500 IS TWICE THAT OF 501!! :thumbsdown: HELP :notworthy: Quote Link to comment https://www.bigmacktrucks.com/topic/36668-compressors/ Share on other sites More sharing options...
39 Baby Mack Posted August 14, 2014 Share Posted August 14, 2014 Yes they are basically interchangeable.There are differences involving the drive and adapter for compressor mounted power steering pumps.The older "500" compressor for Macks used an adapter(spacer) with long studs and short nosed compressor where it bolts to the auxiliary drive.The later "500" compressor for Macks used a long nosed compressor eliminating the need for the spacer(and eliminating one more oil leak).There is a "501" compressor made for a Mack with a long nose that will bolt right up.Ron Quote Link to comment https://www.bigmacktrucks.com/topic/36668-compressors/#findComment-255986 Share on other sites More sharing options...
rustydog Posted August 14, 2014 Author Share Posted August 14, 2014 Yes they are basically interchangeable.There are differences involving the drive and adapter for compressor mounted power steering pumps.The older "500" compressor for Macks used an adapter(spacer) with long studs and short nosed compressor where it bolts to the auxiliary drive.The later "500" compressor for Macks used a long nosed compressor eliminating the need for the spacer(and eliminating one more oil leak).There is a "501" compressor made for a Mack with a long nose that will bolt right up.RonRon...thank you...so with no power steering to worry about.....I need to find a 501 with a long nose..and there are no differences in the drive?? I would assume if going to replace it, one would replace drive as well??..correct??rustyMine has the spacer.. Quote Link to comment https://www.bigmacktrucks.com/topic/36668-compressors/#findComment-255993 Share on other sites More sharing options...
39 Baby Mack Posted August 14, 2014 Share Posted August 14, 2014 I would definitely replace the drive hub on the compressor.Also when you remove the compressor check the oil feed tube in the end of the auxiliary shaft.Most times you'll find they're loose or worn.They're not hard to replace, especially if they're already loose.When installing the new one I used to stake the end that went into the auxiliary shaft so it fits a little tighter in the shaft.It's easy to make a tool to drive the tube into the auxilliary shaft, just use a1/4" bolt and slightly grind it so that it slips easily in and out of the tube.Use this to drive the new tube into the shaft without damaging it.Replace the mounting studs with 1/2" grade 8 bolts.Ron Quote Link to comment https://www.bigmacktrucks.com/topic/36668-compressors/#findComment-255999 Share on other sites More sharing options...
rustydog Posted August 14, 2014 Author Share Posted August 14, 2014 I would definitely replace the drive hub on the compressor.Also when you remove the compressor check the oil feed tube in the end of the auxiliary shaft.Most times you'll find they're loose or worn.They're not hard to replace, especially if they're already loose.When installing the new one I used to stake the end that went into the auxiliary shaft so it fits a little tighter in the shaft.It's easy to make a tool to drive the tube into the auxilliary shaft, just use a1/4" bolt and slightly grind it so that it slips easily in and out of the tube.Use this to drive the new tube into the shaft without damaging it.Replace the mounting studs with 1/2" grade 8 bolts.RonTHANKS FOR THE INFO....LET YOU KNOW HOW I MAKE OUT DOWN THE ROAD....RUSTY Quote Link to comment https://www.bigmacktrucks.com/topic/36668-compressors/#findComment-256008 Share on other sites More sharing options...
doubleclutchinweasel Posted August 14, 2014 Share Posted August 14, 2014 I have Bendix info somewhere that tells which are interchangeable. 2 different drive attachment methods, I think. Not sure which is the oddball. 550?Actually, after looking, I think I was thinking about the 500 vs 501 difference...which, as mentioned already, was related to the power steering connection. So, never mind! Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/36668-compressors/#findComment-256018 Share on other sites More sharing options...
rustydog Posted August 15, 2014 Author Share Posted August 15, 2014 I have Bendix info somewhere that tells which are interchangeable. 2 different drive attachment methods, I think. Not sure which is the oddball. 550?Actually, after looking, I think I was thinking about the 500 vs 501 difference...which, as mentioned already, was related to the power steering connection. So, never mind!I SENT AN EMAIL TO BENDIX YESTERDAY ASKING WHAT MODEL WOULD INTERCHANGE WITH A TU FLO 500 AND THEY REPLIED NONE......I THINK THIS IS A CASE OF THEY DON'T REALLY KNOW....AND JUST EASIER TO SAY NONE THAN PROVIDE A REAL ANSWER....WILL KEEP ASKING TILL I FIND OUT.....THX Quote Link to comment https://www.bigmacktrucks.com/topic/36668-compressors/#findComment-256074 Share on other sites More sharing options...
2 STICK PUPPY Posted August 15, 2014 Share Posted August 15, 2014 You can buy a rebuild kit from bendex .. I just picked one up for a friend it was $116 Quote Link to comment https://www.bigmacktrucks.com/topic/36668-compressors/#findComment-256078 Share on other sites More sharing options...
Maddog13407 Posted August 15, 2014 Share Posted August 15, 2014 funny you guys mention the oil feed tube. I took a compressor off once and it didn't have the tube in it AT ALL going thru the spacer. Quote Link to comment https://www.bigmacktrucks.com/topic/36668-compressors/#findComment-256115 Share on other sites More sharing options...
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