| Author | Message | ||
| James Nicholson Scheibe (Edshrink)
Registered Member Username: Edshrink Post Number: 1 Registered: 8-2009 Posted From: 97.116.148.202 Rating: N/A |
Have a PD 4106 #1005 with power assist steering and, from what I read in the instructions for Sheppard, the wrong pump and the wrong reservoir. I may go to Nimco for the Sheppard stuff I need, but may have local resource that might save me a big bundle of money. I need the exact information - Sheppard model #, etc for the parts needed - gear box, pitman arm, pump, reservoir and anything else one of the experts on this board can tell me - for change over. I have the "Sheppard Steering Conversion" information from coach information network which is helpful, but it doesn't give me enough information for the parts I need to purchase for this specific conversion. Jim | ||
| Dan West (Utahclaimjumper)
Registered Member Username: Utahclaimjumper Post Number: 196 Registered: 1-2005 Posted From: 208.66.38.60 Rating: N/A |
I changed over to Sheppard many years ago, a real snap, contact NIMCO direct and get it from the horses mouth. My cost was $450.00 for everything exept new "U" bolts for the box, your resivour will do fine and the existing lines will be OK and will hook-up with no problem. I removed all the old equipment with a cutting torch and dropped it all in the dumpster then bolted on the Sheppard box with the new "U" bolts, it took me 8 man hours to do >>>Dan (TIP) use 10 weight oil with the Sheppard system. | ||
| Bob Baldwin (Bob4106)
Registered Member Username: Bob4106 Post Number: 177 Registered: 10-2004 Posted From: 24.74.180.20  Rating: N/A |
I have the power assist steering too. My cylinder was leaking, I had it rebuilt for $100.00 bucks last year. Pretty much feels like power steering to me. What would be the differents from that to Sheppard or Ross steering? | ||
| clint hunter (Truthhunter)
Registered Member Username: Truthhunter Post Number: 463 Registered: 1-2009 Posted From: 24.129.237.52  Rating: N/A |
not much if all was tight & good , as it should be if it's the way we like it. >integral power steering such as shepard is a little more forgiving on sloop in the steering system; <external assist which has the asstace flow control added before the steering box reduction shows steering colum slack up big time on these old "add ons", defects such as steering colum U-joint exceesive free play or slider yoke (like on MC 8) translates as pressure/flow for assist after the steering box, where the power ram is added. You end up endlessly overcorrecting at the steering wheel. Sloop or misadjustment in the control mechanism is also very noticealbe in driver steering discomfort... ~these comments are not dirrected specificaly towards the system show in this thread as I am not familuar with it and the pictures lack detail~ | ||
| Laryn Christley (Barn_owl)
Registered Member Username: Barn_owl Post Number: 620 Registered: 10-2006 Posted From: 153.2.247.30  Rating: N/A |
I bought the complete retrofit kit from NIMCO (good take offs from salvaged buses) that updated my bus to integral power steering. The kit includes a Sheppard power steering box, linkage, reservoir, and pump for ~$450. It took one full day to do and I can turn the wheel with one finger. Money well spent for me. Dan, All of Shepards tech support and manuals say use 40wt. Mine does wine when first started at cold temps. What benifits have yow noticed from going to 10wt? I have been tempted to try a lower wt. | ||
| Laryn Christley (Barn_owl)
Registered Member Username: Barn_owl Post Number: 621 Registered: 10-2006 Posted From: 153.2.247.35 Rating: N/A |
James, It sounds like you have the pump that has the reservoir attached to the top of it. If that is the one you are correct, that one will not work with a Shepard system because that pump only puts out ~1200psi and the new system will need something closer to >2000psi. (I am working off memory and it has been a long time, so my numbers might be off but not much). (Message edited by barn_owl on September 06, 2009) | ||
| Tom Caffrey (Pvcces)
Registered Member Username: Pvcces Post Number: 1306 Registered: 5-2001 Posted From: 173.87.179.111 Rating: N/A |
And Bab Steering in California made a point of telling me to drain the ATF fluid in my Sheppard(sp?)and replace it with 15W40 motor oil. The system did work better after I replaced the fluid. For what it's worth. Tom Caffrey PD4106-2576 Suncatcher Ketchikan, Alaska | ||
| Dan West (Utahclaimjumper)
Registered Member Username: Utahclaimjumper Post Number: 197 Registered: 1-2005 Posted From: 208.66.38.60 Rating: N/A |
Laryn, I have used 10 Wt. since day one (ten years) and have never had any issues.>>>Dan | ||
| Frank Allen (Frank66)
Registered Member Username: Frank66 Post Number: 115 Registered: 10-2005 Posted From: 64.12.116.203 Rating: N/A |
if you have a pump that does not have a attached resivoir it will work but the releif valve needs to be changed as the sheppard uses a higher pressure. Frank Allen | ||
| Dan West (Utahclaimjumper)
Registered Member Username: Utahclaimjumper Post Number: 198 Registered: 1-2005 Posted From: 208.66.38.115 Rating: N/A |
NIMCO will send the higher pressure pump along with the other pieces.>>>Dan | ||
| Bill Gerrie (Bill_gerrie)
Registered Member Username: Bill_gerrie Post Number: 283 Registered: 3-2006 Posted From: 216.198.139.38 Rating: N/A |
Jim Nimco is great to deal with. Make sure you get a Sheppard 492 box and almost no play in the input shaft. No more then 1/8" movement. These boxes have no way to adjust them. They must be rebuilt to remove any excess play. Your angle drive gears should be 1 to 1 ratio or you will have too much play in the steering wheel and you can use a smaller steering wheel as well. Use #10 oil if the expected temp goes below 40 degrees or the pump will scream at you. Bill |