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Case 188D cranking speed

P

Patrick Dwyer

Member
Can anyone tell me what the cranking speed of their 188D diesel is, or what it should be? Mine is cranking at about 100-130 rpms and it won"t fire.
 
My dad had a 450 w/188 diesel in it. We went through the same stuff, only to find out that the starter was 24 volts. Hooked it up accordingly, and it spun normally.
 
Hook up 2 12V batteries in parallel; ie, positive to negative between the 2 batteries and normal positive to starter, negative to ground on the other two posts, unless you have a Positive ground system.

Just think of it a two flashlight batteries two 1.5V batteries sitting - to + = 3V in your flashlight and so on for higher voltage lights.

Jim
 
Like JGarner says..Hook your your chasis ground to one - on your first battery, then hook the + from that battery to the - on the second battery. Then hook your + cable to the starter.

(I know, if defies logic to hook + to -, but it works)
 
Yes, its a Case 310F crawler. I just tried out the wiring:
starter to 1st battery +
1st battery - to 2nd battery +
2nd battery - to ground.

The starter just clicked.
Any other ideas? I've tried a rebuilt starter and a newer one. no luck.
 
What are some other reasons for slow cranking? The motor is freshly rebuilt and turns relatively easily (for a diesel). It's completely rewired, too.

I've been working on starting it for the past month and a half with no luck. I'm thinking that I will either have to find a reliable mechanic in the CT area, or dig a hole with the excavator and bury this thing (just kidding). It just sits in the yard staring at me... It ran great last year until it spun a bearing. I rebuilt the whole motor over the winter, had it machined, etc. Now - it just won't crank fast enough. I'm nearing the end of my patience.
 
Is the machine a + ground machine? I know some of the older stuff was, but not sure when it ended. Maybe the 24V fried the solenoid? Look for a 24V solenoid. My Dad's dozer was a late 60's model 450 and it was definately a 24V system.
 
I put everything back together for the 12v system and the starter cranked again, but still only at 100 rpms.

For a positive ground system, what do I do? The machine is a 1963 or 64, I believe.
 
Switch the terminals around for a + ground. I still think you have a 24V system, but had a lost connection somewhere. But, I may be wrong. My Dad's old 450 was a 67 or 68, I think.
 
I'll give that a shot. I called the Case dealer and asked about getting a new starter and they said that the 310F OEM was discontinued. I asked about any other models that used the 188D and the salesman offered the starter from the 580C. Any idea if that would do me any better?
 
Well, I tired that, but when I tried to make the last connection, the cable stuck to the battery post. I'm sure it shouldn't do that, right?

Where should I ground this whole circuit out to? I have it bolted to one of the starter mounting bolts right now. I would take some pictures to show what I've got, but my digital camera doesn't work.

I feel like the solution is something very simple, but I just can't grasp this stuff.
 
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