Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 14, 2025 ...

The electric wires are still connected.

Before I disconnect the bypass and run the fuel through the filters I thought I would check in here and see if anybody might have a good reason why I should bypass the Raycor filter.

In our original set-up, that old Racor / Winn 200 200 had the connection to the electric air purge thingy and the clear glass-type filter.  It also contained an electric driven fuel assist pump. The pump was still working, but the little black box that supplied the power to the pump went bad.  We began to experience situations where we were "fuel-starved" when the engine called for extra power

My question: Did this "electric driven fuel assist pump" run while your coach was driving, particularly when climbing hills? If you had a Winn system which was the same as the one that I had, it only would run when the purge button was pressed to purge air out of the fuel. Unless your rig has an electric fuel assist pump that my rig does not, I believe that the fuel starvation you were experiencing was caused by air in the fuel rather than a non-working purge pump.

  We began to experience situations where we were "fuel-starved" when the engine called for extra power ... such as climbing hills in the mountains. 

Mine seems to flatten out on power at top rpm.  50mph up 6% grades like cajon pass.

A friend who had a 97 U320 told me that after he had the engine fuel lines replaced, his 450hp M11 had much more power. The Cummins shop tested his fuel lines by connecting a fuel vacuum pump at the engine and the fuel arrived frothy due to air being sucked through pin holes in the fuel line. I am trying to determine how I can do the same test for my engine fuel lines.

I replaced the generator fuel lines three years ago due to leaks, and many others have done that also.

It seems that Foretravel used fuel lines during the nineties that only last 15 years.

In our original set-up, that old Racor / Winn 200 200 had the connection to the electric air purge thingy and the clear glass-type filter.  It also contained an electric driven fuel assist pump. The pump was still working, but the little black box that supplied the power to the pump went bad.  We began to experience situations where we were "fuel-starved" when the engine called for extra power ... such as climbing hills in the mountains.  After much head scratching and changing of filters, fuel treatments and the like, we landed in Santa Fe at Hal Burns Truck & Diesel repair.  The mechanic went over every electrical connection on the coach, crawled over everything and finally measured the vacuum pressure on the fuel lines.  There was a clear problem.  He disassembled the Racor filter unit and determined that while the assist pump did work, it was not getting any juice.  In his magic book of Cummins information he discovered that that set-up was no longer being used, and that the solution was to remove the whole shebang, replace it with a very simple armature and a good ol' standard water separating filter.  Bingo.  Problem solved and 2 years later we have not had a single problem.  the unit also acts as something of a "fuel heater", and as the mechanic told us,"Unless you are an Ice Road Trucker you do not need this."  I am not surprised that yours has been bypassed and suspect that there were problems in the past.

When I first bought my 96 U320, it held 48 mph up a 6% grade and I passed most other trucks and motorhomes which seem to be climbing very much slower than my U320. I believe 48 mph up a 6% grade is peak torque on the 400hp M11 and the Silverleaf seems to confirm that. Now, it does not seem to hold 48mph up 6% grades. This is not easy to determine due to other factors like wind and air temperature. 

A friend who had a 97 U320 told me that after he had the engine fuel lines replaced, his 450hp M11 had much more power. The Cummins shop tested his fuel lines by connecting a fuel vacuum pump at the engine and the fuel arrived frothy due to air being sucked through pin holes in the fuel line. I am trying to determine how I can do the same test for my engine fuel lines.

I replaced the generator fuel lines three years ago due to leaks, and many others have done that also.

It seems that Foretravel used fuel lines during the nineties that only last 15 years.

Lon and Cheryl:
I build a manual air purge for my leaking Winn filter when the purge pump did not work. I used an empty small pop bottle, drilled two holes in the cap, one for a hose with a schrader valve screw on female end and one for a hose to suck on. The schrader valve hose went to the bottom of the bottle while the suction hose stopped at the top. I connected the schrader end to the schrader valve on the Winn and sucked on the other hose until diesel appeared in the pop bottle.

When you change the secondary fuel filter which is mounted low on the engine, if your fuel tank is full and the front end of coach is high, diesel will siphon when the filter is removed. If you prefill the new filter, no purging will be needed. This may also work when changing the primary filter, which is mounted on the frame.

Rebuilt the POS Winn three times, vacuum leaks. Trash