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Search: Posts Made By: Harvard
Forum: Maintenance and Repair 04-28-2022, 04:05 PM
Replies: 22
Views: 3,455
Posted By Harvard
https://www.rvforum.net/threads/e350-e450-handling...

https://www.rvforum.net/threads/e350-e450-handling-problems-are-caused-by-too-little-caster.40337/
Forum: Maintenance and Repair 11-06-2021, 07:39 PM
Replies: 9
Views: 1,843
Posted By Harvard
Could be a p-trap that is blocked by oil which...

Could be a p-trap that is blocked by oil which allows flow OK when warm but not when cold.
Forum: Class A Motor Coach 03-08-2021, 03:57 PM
Replies: 73
Views: 16,139
Posted By Harvard
caster trail

By reducing the tire pressure you are increasing the effective runtime caster trail. This is similar to increasing the caster angle.
Forum: Class A Motor Coach 03-05-2021, 03:33 AM
Replies: 73
Views: 16,139
Posted By Harvard
Too little +caster will result in a steering dead...

Too little +caster will result in a steering dead "do nothing" zone between left and right at highway speeds.


+3.5 degrees of caster is too little for highway driving, you want to have +5.5 or...
Forum: Maintenance and Repair 02-20-2021, 06:01 PM
Replies: 4
Views: 982
Posted By Harvard
Good advice.

Good advice.
Forum: Motorhome Tech Topics 01-15-2021, 04:41 PM
Replies: 19
Views: 1,748
Posted By Harvard
During your road test look for any loose steering...

During your road test look for any loose steering feeling at highway speeds. If so, it could mean too little positive caster and require a special alignment to get the caster over +5 degrees. Loose...
Forum: Maintenance and Repair 12-13-2020, 03:16 PM
Replies: 26
Views: 6,081
Posted By Harvard
You can estimate with the 1 in 60 rule: 1...

You can estimate with the 1 in 60 rule:

1 inch in 60 inches will sustain and angle of 1 degree.
1 inch in 120 inches will sustain and angle of 1/2 degree
3 inches in 60 inches will sustain an...
Forum: Motorhome Tech Topics 12-13-2020, 03:53 AM
Replies: 29
Views: 11,421
Posted By Harvard
In pre-power steering days it was set LESS...

In pre-power steering days it was set LESS positive.
Forum: Motorhome Tech Topics 12-04-2020, 04:55 AM
Replies: 29
Views: 11,421
Posted By Harvard
Interpreting F53 Caster Specification

Given: 2011 F53 Caster Spec 3.75 +/-1,75 Degrees

This specifies a range of +2.0 to +5.5 Degrees

Logical Interpretation:

+2.00 Degrees for 100% city driving
+3.75 Degrees for 50% city and...
Forum: Motorhome Tech Topics 12-04-2020, 04:26 AM
Replies: 29
Views: 11,421
Posted By Harvard
Alignment with the caster set above +5 Degrees.

Alignment with the caster set above +5 Degrees.
Forum: Maintenance and Repair 11-26-2020, 09:24 PM
Replies: 106
Views: 13,503
Posted By Harvard
or an Electric Fencer connected HOT to chassis...

or an Electric Fencer connected HOT to chassis and GND to Earth.
Forum: Modifications and Updates 11-26-2020, 06:50 PM
Replies: 43
Views: 17,627
Posted By Harvard
There is a outside seam at floor level from the...

There is a outside seam at floor level from the front of the box to the rear of the box. Use a tape measure to measure from the seam to ground at the front and the seam to ground at the rear of the...
Forum: Modifications and Updates 11-26-2020, 05:27 PM
Replies: 43
Views: 17,627
Posted By Harvard
Is your unit "noticeably" nose down in attitude? ...

Is your unit "noticeably" nose down in attitude?
If so, you definitely have a caster problem. IMO.
Forum: Modifications and Updates 11-25-2020, 06:06 PM
Replies: 43
Views: 17,627
Posted By Harvard
Typically yes, unless you have a new dog not...

Typically yes, unless you have a new dog not familiar with old tricks.
Forum: Modifications and Updates 11-24-2020, 09:59 PM
Replies: 43
Views: 17,627
Posted By Harvard
Yes: Moog-K8986, NAPA 158986 or SPC 794...

Yes: Moog-K8986, NAPA 158986 or SPC 794 Concentric Sleeves

As a DIY project: Install adjustable sleeves set to 0.0 Camber and +2.0 Caster, then align the TOE. That's all you need to do, just like...
Forum: Modifications and Updates 11-24-2020, 04:14 PM
Replies: 43
Views: 17,627
Posted By Harvard
Some E350/E450 have handling issues, some do not,...

Some E350/E450 have handling issues, some do not, the following may explain the difference:


Ford ships all E350/E450 cut aways with identical fixed, non adjustable
caster/camber sleeves, "one...
Forum: Modifications and Updates 11-24-2020, 04:09 PM
Replies: 43
Views: 17,627
Posted By Harvard
Your handling problems are caused by having too...

Your handling problems are caused by having too little positive caster.
Here is a link to our experience, Circa 2010:

E350/E450 Handling Problems are caused by too little + CASTER...
Forum: Modifications and Updates 11-12-2020, 04:18 PM
Replies: 18
Views: 2,432
Posted By Harvard
positive caster

Positive caster is natures "steering stabilizer".
Forum: Maintenance and Repair 10-07-2020, 04:40 PM
Replies: 28
Views: 3,663
Posted By Harvard
The OP has/had an open GROUND. An open...

The OP has/had an open GROUND.

An open ground allows the RV chassis to float and develop a CHASSIS to EARTH voltage UP TO HOT/2 = 60VAC by virtue of a stray capacitive coupling between HOT and...
Forum: Motorhome Tech Topics 09-28-2020, 08:00 PM
Replies: 23
Views: 7,596
Posted By Harvard
Personally I would have maintained the same speed...

Personally I would have maintained the same speed downhill as I could maintain uphill on the same hill. At 8% that would be about 35-40 mph in 2nd Gear. JMO.
Forum: Maintenance and Repair 09-07-2020, 07:58 PM
Replies: 7
Views: 973
Posted By Harvard
The most likely place for a holding tank to...

The most likely place for a holding tank to freeze (expand and split) are in the exit pipes upstream of the gate valves. IMO.
Forum: Maintenance and Repair 07-13-2020, 07:05 PM
Replies: 51
Views: 15,829
Posted By Harvard
If you have loose steering at highway speeds you...

If you have loose steering at highway speeds you need more +caster.
Forum: Motorhome Tech Topics 06-18-2020, 03:51 PM
Replies: 36
Views: 12,189
Posted By Harvard
Here are my thoughts on this E series caster...

Here are my thoughts on this E series caster subject:

Some E350/E450 have handling issues, some do not, the following may explain the difference:

Ford ships all E350/E450 cut aways with...
Forum: Modifications and Updates 05-16-2020, 03:47 PM
Replies: 26
Views: 7,455
Posted By Harvard
RV handling may be impacted by the combined...

RV handling may be impacted by the combined effects of:

1. The degree of front end stability (as established by the caster trail):
- caster angle (including nose attitude)
- tire diameter
...
Forum: Modifications and Updates 05-10-2020, 03:02 PM
Replies: 26
Views: 7,455
Posted By Harvard
POPULAR MECHANICS MAY 1973: START QUOTE: If...

POPULAR MECHANICS MAY 1973:
START QUOTE:
If too little caster exists, the car will wander and weave,
thus necessitating constant corrections in steering.
END QUOTE:
Showing results 1 to 25 of 59

 
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