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Grumman 870 Batteries Mark Neary 9-6-03  
I bought a 1979 870 that has been sitting for about 3 years. I have all the service manuals and records as well as parts books but nowhere in any of these do I see the connection arrangement for the 4 batteries. They were removed from the holder and placed inside the bus for storage. I need to get new ones and connect them to see if it runs. Might someone who owns a bus like this be able to send me a pic of the connection in their bus?
Thank you
Re: Grumman 870 Batteries Bruce Zummo 9-11-03  
First, you need to find our if its a 12 volt or 24 volt system. That makes a huge difference (I assume at that age, it's a 12 volter!). Next, I believe you may have "Series 31" batteries and if they've been sitting for three years, I would attempt to charge them first and see if they'll even hold a charge! You bus is similar to my Flxible Metro (identical design - identical bus - different name because of the manufacturer). Once you get this information email me privately and I'll help you get it started! Bruce
Re: Grumman 870 Batteries Mando 7-6-12  
Hey I have a 1988 flxible Someone stole my batteries,and other stuff. so I am looking for someone who can tell me what kind of batteries it uses and maybe has a picture on how they are set up? basically same question as last guy but i don't even know what kind of batteries to use. I assume its 4 small batteries with a lot of connections...
Re: Grumman 870 Batteries John 11-24-17  
You should be using 2 large truck type batteries. Might not be able to get them with the exact same side terminals that were on the original. One thing I had fail on mine and drain the batteries was a solenoid connector in the a/c unit above the engine. I found batteries that were dead, charged and got new ones. When hooking them up, the air handling fan came on. I thought I had hooked up a wire wrong as there are a bunch of them. Tried everything and finally got them hooked to where the fan didn't come on. It was coming on even with the fuse out and switch off at the control panel. It was later I discovered the rusted out and shorted out solenoid. A lot of work and bus sitting there scratching my head and wringing my hands. The supercharger required disassembly and cleaning because of the extended parking.
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