Posted by JDemaris on September 29, 2013 at 13:32:38 from (70.215.8.81):
In Reply to: Mercedes glow plugs posted by Harry Keller on September 28, 2013 at 16:11:27:
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The new glow plugs draw less then 10 amps each. So any relay that can handle 40 amps is fine. The old Ford type fender-mount relays are fine. NAPA part # MPE ST82SB. Also a glow plug relay listed for a 1983 Chevy Blazer diesel works just as well.
There's no set rule as to how to wire it. I ran two big (#8 gauge) wires from the relay to the plugs. Each #8 wire powers two glow plugs (with #10 wire connecting those two to each other). My wiring was overkill. Three feet of a single #8 gauge copper wire results in 1.6% voltage drop @ 40 amps which is good enough for most people.
I removed the original German glow-indicator-resistance unit. I riveted a washer over the hole that holds a new 12 volt indicator light. I also installed a water-proof momentary push-button to operate the plugs. I could of use the old lever-switch if I wanted to.
Tractor in the photo is my older B275 with a CAV inline pump. It was my worst starting British IH until I put the new plugs in. My newer ones with rotary CAV pumps were always better starters. I changed them over too, to the new plugs.
Bosch sells the plugs as already mentioned. So does Beru as # GV626, or Swag as # 10917215, HKT as # B-054, Mercedes # 1592501, etc.
Putting the new plugs on the IH made a huge difference. So did the power steering kit I bought for $27! Never seen another setup like it and I have no idea who made the kit. Best $27 I ever spent (on a tractor).
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