older bus information

RFarris · November 02, 2018, 04:41:39 PM

Well now I need a new radiator or the pans top and bottom and sides.
Cores can be made. does anyone have info regarding a source for these?

1958 GM 4104-3456

Richard

chessie4905 · November 02, 2018, 06:05:28 PM

Check with Luke at USCoach. He seems to be able to source most items.

RFarris · November 30, 2018, 02:06:50 PM

Does anyone know what the switch labeled: " overrule switch for moto gard" was?

Geoff · December 01, 2018, 07:17:53 AM

Quote from: RFarris on November 30, 2018, 02:06:50 PM
Does anyone know what the switch labeled: " overrule switch for moto gard" was?

That would have to be the override switch for the engine safety shut down system. i.e., overheating, low oil pressure. The override gives you time to pull over.

dtcerrato · December 01, 2018, 08:01:37 AM

To my knowledge (correct me if I'm in accurate) all 4104s we're positive ground. Our 53 conversion was positive ground most of it's life. We just converted it to neg. ground this year. The chassis changeover was a piece of cake but the "over the years" conversion was a real PITA. Always had separate chassis & house batteries.

dtcerrato · December 01, 2018, 08:04:03 AM

On our 04 the rear emergency door was also wired in with the moto- guard system. That system is still active in operation in our bus.

RFarris · December 01, 2018, 02:57:47 PM

Thanks everyone that make sense now. Our bus was converted some years ago to negative ground. I'v found a few grounding straps added to the frame work.
Regards,
Richard

richard5933 · December 01, 2018, 03:19:13 PM

Inspect those grounding straps well, along with any other ground connections you run across. These are a very common source of all sorts of electrical problems. Even straps that look good on the outside can have rot inside them and be compromised, so check thoroughly. I've removed, cleaned, and reinstalled lots of ground connections all over our bus. Usually I replace the connecting hardware unless it's really clean, and then use dielectric grease to protect them after things are back together.

TomC · December 02, 2018, 07:44:55 AM

I drive on highway 118 in L.A. area and see a 4501 parked at a farm in the Moorpark/Simi Valley area. Wonder if you know about it? Good Luck, TomC

pd4501-771 · December 02, 2018, 01:37:43 PM

Hi Tom

You have my attention. The 4501 location does not sound familiar. Can you give any more details on exact location (crossroad, landmark, etc.) that I may be able to find the bus on Google Earth? Thanks

RFarris · December 19, 2018, 04:28:52 PM

Does an air pressure of only 40 psi on the gage indicate a large leak or could there be another problem.

R Farris

TomC · December 19, 2018, 05:07:58 PM

4501 is on 118 about halfway between Somis and Moorpark just west of the Moorpark Reclamation Facility on the south side of the highway. First farm west of the Reclamation Facility. Good Luck, TomC

richard5933 · December 19, 2018, 05:37:37 PM

Low air pressure could be a leak, could be a bad governor on the compressor, a bad compressor, a bad gauge, or any number of other issues.

Can you confirm the gauge is correct by putting a gauge on the system near the compressor somewhere? Maybe you have a quick connect fitting in the engine bay?

buswarrior · December 19, 2018, 05:42:26 PM

A good compressor can make close to 40 lbs with a drain valve held open.

What is the temperature where you are? Frozen valves are a popular disabling occurrence this time of year.

Happy coaching!
Buswarrior

pd4501-771 · December 19, 2018, 07:12:42 PM

Thanks for the 4501 location info Tom. I appreciate that. I checked Google earth in that area, but can not locate the bus. It may not show up when image was captured. It seems Google is not always current. The view of my place is several years old due to particular vehicles that were present in image. Take care

Tom