| Author | Message | ||
| tony denny (Papatony)
Registered Member Username: Papatony Post Number: 16 Registered: 10-2010 Posted From: 74.206.82.239 Rating: N/A |
Can anyone tell me about changing to a sheppard steering system for a 4106. | ||
| Bill Gerrie (Bill_gerrie)
Registered Member Username: Bill_gerrie Post Number: 396 Registered: 3-2006 Posted From: 216.198.139.38  Rating: N/A |
Tony The Sheppard box is a model 492. With Sheppard boxes you should change the two gears that form the lower angle box to a 1 to 1 ratio so there isn't so much play in the steering. They are a 1 to 1.5 in manual steering. Most guys will change the steering wheel to a smaller dia to give a better road feel as well. You need to change the radius rod that goes over the box to a curved one as well to give you enough clearance. The Vickers pump mounts on the engine and is gear driven between the compressor and altenator. You need a resevoir as well mounted above the input of the pump. The high pressure line is 3/8" and the return line is 1/2". You need a 2 wire grade of hydraulic line for the high pressure as it is about 1500 lbs pressure and a 1 wire will do for the return line. It is a lot of work to change but well worth it in the end. DO NOT go underneath a bus without blocking it properly as if a bag or line bursts you will not get out in time. Bill | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 2010 Registered: 10-2003 Posted From: 71.58.71.157  Rating: N/A |
you can use black pipe of the same id's as the hose to save a good deal of money. they can be mounted in the lengthwise grooves in the underside of the body and secured with straps. Run them to where the wheel wells begin and grooves end.Check with NIMCO bus;they probably have the box and pump you need. | ||
| FAST FRED (Fast_fred)
Registered Member Username: Fast_fred Post Number: 1385 Registered: 10-2006 Posted From: 69.19.14.26  Rating: N/A |
"you can use black pipe of the same id's as the hose to save a good deal of money. Suggest you google the working pressure of black pipe" I find,he working pressure depends on the size of the pipe. These pressures are rated up to 400 degrees F. Again, these pressures are maximum working pressures, not burst pressures. 1/4" 188psig 3/8" 203 psig 1/2" 214 psig 3/4" 217 psig 1" 226 psig 1-1/4" 229 psig 1-1/2" 231 psig 2" 230 psig You might visit, http://www.engineeringtoolbox.com/astm-steel-pipes-working-pressure-d_775.html FF | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 2011 Registered: 10-2003 Posted From: 71.58.71.157 Rating: N/A |
check McMaster-Carr's specs; they list it for over 100 psi. We used pipe purchased from building supply. It worked satisfactorily in our 4104 for over 20 years with no problems or leaks. You also don't have the wear and sag problems with hose. They also make schedule 80 pipe and more expensive materials if failure is a concern. | ||
| Tom Phillips (Fortyniner)
Registered Member Username: Fortyniner Post Number: 32 Registered: 2-2010 Posted From: 66.93.216.253 Rating: N/A |
Will the radius rod from a 4905 work on the 4106? I planned on scavenging my old 4905a sheppard system bus didnt realize the radius rod had to be changed out. Tom P. | ||
| Bill Gerrie (Bill_gerrie)
Registered Member Username: Bill_gerrie Post Number: 402 Registered: 3-2006 Posted From: 216.198.139.38 Rating: N/A |
Tom You can use any radius rod if it is curved. They are about 1/2" thick wall so if the length is too long you could cut and weld it. I did that about 25 years ago and it worked out great. Bill | ||
| Laryn Christley (Barn_owl)
Registered Member Username: Barn_owl Post Number: 673 Registered: 10-2006 Posted From: 71.254.36.71  Rating: N/A |
My bus was converted to a Sheppard system years ago but it needed a refreshing. I bought a complete kit from Nimco and am very happy with it. The kit had everything but the hoses. Not very hard to do. The steering box is a bear to move around but everything is doable by one person. | ||
| Bill Gerrie (Bill_gerrie)
Registered Member Username: Bill_gerrie Post Number: 403 Registered: 3-2006 Posted From: 216.198.139.38 Rating: N/A |
Laryn How did you like laying on your back and putting the 492 box onto the axle? Trying your best to not trap your fingers under the box against the axle. Great workout. I did it 25 years ago but would not be about to do one today. Bill | ||
| Laryn Christley (Barn_owl)
Registered Member Username: Barn_owl Post Number: 674 Registered: 10-2006 Posted From: 71.254.36.71 Rating: N/A |
Bill, I had to stack wooden planks to essentially make a ramp to walk it up to the axle. My bus sits over a very shallow pit so thankfully I didn't spend much time on my back. There really is no lifting the 492 (too heavy!), just a lot of dragging and sliding it around. I spent about half a day doing the swap not including the prep time. | ||
| Paso One (Paso_1)
Registered Member Username: Paso_1 Post Number: 172 Registered: 11-2004 Posted From: 142.165.246.240  Rating: N/A |
Thats the next job on the list now that the motor is back in. I have all the lines ran to the front already. I was thinking of lifting it up to the axle on the floor jack and sliding it onto the beam. Once I get the old radius arm off and out of the way, I pulled the arm off the donor bus with a come a long. Sure wish there was a easier way of pulling it loose. | ||
| Bill Gerrie (Bill_gerrie)
Registered Member Username: Bill_gerrie Post Number: 404 Registered: 3-2006 Posted From: 216.198.139.38 Rating: N/A |
Paso Sometimes the only way to remove the radius rods are to drill out the rubber bushing and install new ones after they are off. They seem to become part of the mount after 30+ years. Bill |