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SP (Single Axle Pusher Unique Issues) If you have a unique issue with your SP model coach and it can't be answered in one of the other forums here, then this is where you can list it....List your SP parts here too.

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Old 3 Weeks Ago
chiplamb chiplamb is offline
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Default SP36 speedometer intermittent

Was working flawlessly before and now following a bunch of work to exhaust, air compressor, fan clutch and a lot else it is not. It briefly comes back to life particularly on deceleration but not accurately. Where is the sending unit for it (and thus the loose connection?) Thank you
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Chip Lamb
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Old 3 Weeks Ago
B.Nyhof B.Nyhof is offline
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It picks up on the rear brake hub. I believe drivers side. It is a Hall Effect sensor. Might just be a loose/bad connection.
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Brian Nyhof
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1989 SP 36
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Old 3 Weeks Ago
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Quote:
Originally Posted by chiplamb View Post
Was working flawlessly before and now following a bunch of work to exhaust, air compressor, fan clutch and a lot else it is not. It briefly comes back to life particularly on deceleration but not accurately. Where is the sending unit for it (and thus the loose connection?) Thank you
Tap, Tap on the face of the speedo, the speedo has a history of being intermittent,
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Old 3 Weeks Ago
chiplamb chiplamb is offline
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Peeled back the boot on the speed sensor. A bit crusty up in there. How are the wires connected to it? No visible screws, nuts etc. Any one have a part number? I don't think it's the Speedo (rapped on it repeatedly, Bill... I used to fly planes!) Thanks, CHIP
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Chip Lamb
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Old 3 Weeks Ago
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Chip, The wires were potted on our 90 SP Speed sensor.
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Old 3 Weeks Ago
chiplamb chiplamb is offline
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"potted" ? I WD'ed it earlier today, will investigate further the next time it moves in a few days. Currently sitting in my home driveway crying out for a bath, which it will get tomorrow!
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Chip Lamb
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Quote:
Originally Posted by chiplamb View Post
"potted" ? I WD'ed it earlier today, will investigate further the next time it moves in a few days. Currently sitting in my home driveway crying out for a bath, which it will get tomorrow!
I had some intermittent issues with mine, I ran a new ground wire direct to the speedo and to a solid ground on the frame, fixed my problem.
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Old 3 Weeks Ago
chiplamb chiplamb is offline
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Thanks. Will look at it again during the week.
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Chip Lamb
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Old 3 Weeks Ago
chiplamb chiplamb is offline
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Does anyone have the relevant wiring diagram for SP36 instruments, specifically with the wires from the speedometer through the bulkhead connector and thus to the sending unit? I want to see if it's in the cannon plug but don't want to do them all!
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Chip Lamb
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Old 2 Weeks Ago
chiplamb chiplamb is offline
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May have found the culprit - after soaking in Liquid Wrench for a few days I got not just the lock nut but a little over half of the sender to pop free. The end of it is broken off in the beefy cast iron bracket on the back of the axle. While I may have finished it off I suspect it was bad. The connectors were also very rusty at the end, the nuts had about disintegrated. I think a shop visit is in order to prevent me from breaking that bolt off since the beefy cast iron bracket will need to come off or be replaced!
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