bulldogboy Posted April 13, 2017 Share Posted April 13, 2017 (edited) If your VIN includes "6BG", the 6 refers to a fire truck and "BG" is a "BG" chassis. Fire "BG" chassis were also referred to as a "Type 50" model fire truck. "Type 50"s had a 500 GPM rotary pump. bulldogboy Edited April 13, 2017 by bulldogboy Quote Link to comment https://www.bigmacktrucks.com/topic/49013-mack-ap-built-date-and-delivery-history/page/2/#findComment-367272 Share on other sites More sharing options...
fxfymn Posted April 14, 2017 Share Posted April 14, 2017 I do not believe Mack made their own pumps. The pumps produced by Northern for Mack had the Mack logo cast into them. Just as they do now, Mack was an assembler of parts produced by sub-contractors based on Mack designs when the truck was built. I have been told that Mack even purchased the hose bodies of the early fire apparatus from Northern. Quote Money, sex, and fire; everybody thinks everyone else is getting more than they are! Link to comment https://www.bigmacktrucks.com/topic/49013-mack-ap-built-date-and-delivery-history/page/2/#findComment-367351 Share on other sites More sharing options...
Mack_M123 Posted April 14, 2017 Author Share Posted April 14, 2017 No the VIN is 6AP, thought AP model, but looks that is will be an early B model... Quote Link to comment https://www.bigmacktrucks.com/topic/49013-mack-ap-built-date-and-delivery-history/page/2/#findComment-367384 Share on other sites More sharing options...
1958 F.W.D. Posted April 14, 2017 Share Posted April 14, 2017 On 4/13/2017 at 4:34 AM, Mack_M123 said: looks like a roots blower design Inside like Detroit Diesel have...? Rotary-Gear Style pump, Manufactured by Northern for Mack. Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment https://www.bigmacktrucks.com/topic/49013-mack-ap-built-date-and-delivery-history/page/2/#findComment-367385 Share on other sites More sharing options...
Mack_M123 Posted April 14, 2017 Author Share Posted April 14, 2017 Thought Mack also built their own transmissions and rear axles, also have the IM logo cast in... Must disassemble the pump it don`t run till the 60s I think. The bronze volume/pressure regulating sleeve stucks in the pump (must make a special puller tool) and many dirt, rust in...But the pump rotor turns over free if I hand crank the engine. The front priming pump (to prime the pump with water if water sucked from lake) also stucks, I think they only use hydrants. Quote Link to comment https://www.bigmacktrucks.com/topic/49013-mack-ap-built-date-and-delivery-history/page/2/#findComment-367392 Share on other sites More sharing options...
Mack_M123 Posted April 14, 2017 Author Share Posted April 14, 2017 I found two pics of exact my truck from the 30s. Hyde Park Cincinatti Stadion 46 Engine 46! Looking for one historic pic from the rig before the station maybe someone have? Only found the newer Seagrave rig which they have in service as ENG46 after my truck from 1955 to 1976 Quote Link to comment https://www.bigmacktrucks.com/topic/49013-mack-ap-built-date-and-delivery-history/page/2/#findComment-367393 Share on other sites More sharing options...
fxfymn Posted April 15, 2017 Share Posted April 15, 2017 Mack did, and still does, build their own axles, transmissions, engines, etc., but they never built their own fire apparatus pumps. The early pumps were specifically made for Mack and thus had the Mack or IM logo cast into them for Mack. Just because a part has a cast Mack or IM logo doesn't mean it was produced by Mack. Quote Money, sex, and fire; everybody thinks everyone else is getting more than they are! Link to comment https://www.bigmacktrucks.com/topic/49013-mack-ap-built-date-and-delivery-history/page/2/#findComment-367420 Share on other sites More sharing options...
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