Jenn Posted September 3, 2022 Share Posted September 3, 2022 Hello my husband just recently got a 57 B61LT with air start that we are trying to restore. I have been searching the web for days trying to get information on the air start system and wiring system. If there is anyone out there that can please please help me in the right direction I would greatly appreciate it more than you know. Jenn Quote Link to comment https://www.bigmacktrucks.com/topic/70389-57-b61lt-air-start-please-help/ Share on other sites More sharing options...
Popular Post Swishy Posted September 5, 2022 Popular Post Share Posted September 5, 2022 Hi Jenn others will correct me where eye B rong With the engine running the compressor builds up air in a few air tanks th@ B 4 air wipers, brakes, radiator shutters etc when the tanks have about 90psi a dump valve then starts fillin the big air start tank. normally U dun switch off engine until air tank pressure is a constant 120 psi normally means air start tank is full here on the udder side of the world in Australia Mack had mainly air start as standard fitment for the B61s there was a lever under the seat that was a mechanical lever to dump a big heap of air to the air stater about a 1" diameter hose to get a lot of air real quik to the stater So from the big air tank a large 1" d aeroqip hose ran up under the floor where a big dump valve is th@ is controlled manually to dump the air into a Ingersol Rand air start OR on some V: they had a electric solinoid type of valve to do the same job acuple of our Macks have the electric solinoid mounter on the fire wall and with a flat battery U could use a ball point pen to push up into this solinoid but first U need air in the tank..... U could use your shop air to fill the airstart tank Best-O-Lucko leme kno what U find cya 4 Quote Link to comment https://www.bigmacktrucks.com/topic/70389-57-b61lt-air-start-please-help/#findComment-508588 Share on other sites More sharing options...
mrsmackpaul Posted September 5, 2022 Share Posted September 5, 2022 Pretty much what Swish says What isnt it doing Paul Quote Link to comment https://www.bigmacktrucks.com/topic/70389-57-b61lt-air-start-please-help/#findComment-508590 Share on other sites More sharing options...
Freightrain Posted September 6, 2022 Share Posted September 6, 2022 Should have a big air tank that only feeds the starter with 1" air line. Does truck still have large hand valve inside to actuate the starter? It's a simple system to work on. I have air start on my B61. 1 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/70389-57-b61lt-air-start-please-help/#findComment-508708 Share on other sites More sharing options...
Jenn Posted September 11, 2022 Author Share Posted September 11, 2022 Thank you all very much for the information you provided me. I have one more question would anyone know where I can get the wiring diagrams for the truck? Thanks again Quote Link to comment https://www.bigmacktrucks.com/topic/70389-57-b61lt-air-start-please-help/#findComment-509091 Share on other sites More sharing options...
h67st Posted September 11, 2022 Share Posted September 11, 2022 You could check with the Mack Museum (610-351-8999); they have a lot of information. If they help, make sure you donate some money to the museum. You could also watch ebay; a lot of Mack manuals show up on there. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/70389-57-b61lt-air-start-please-help/#findComment-509102 Share on other sites More sharing options...
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