| Author | Message | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 2091 Registered: 10-2003 Posted From: 71.58.71.157  Rating: N/A |
A poster on the other board asked how far down the pickup tube goes in the tank on a 4905. As I have one sitting down in the shop, I checked it. The tube goes clear to the bottom and would touch, but there is a 3 to 4inch circular depression below the pickup. It is about 3/8 inch deep. You can see this depression from bottom of tank. It also has baffles about every two feet. They are all slotted for movement of the fuel sender arm; regardless if it ever had one. Maybe someone that is registered could forward this to the other site. Thanks | ||
| Bob MacIsaac (Wildbob24)
Registered Member Username: Wildbob24 Post Number: 134 Registered: 5-2007 Posted From: 184.37.198.95  Rating: N/A |
John, Done. Bob | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 2092 Registered: 10-2003 Posted From: 71.58.71.157 Rating: N/A |
thanks, Bob | ||
| R.C.Bishop (Chuckllb)
Registered Member Username: Chuckllb Post Number: 1531 Registered: 7-2006 Posted From: 97.224.10.153  Rating: N/A |
JWR...that is amazing from my point of view....that the tube goes so close to the bottom. Wonder how they "avoid" picking up gunk, H2O, etc? As I recall, mine is considerably higher than 3/8 above the flat...not counting the depression. Been a while since I installed the Webasto pick-up (which I set at about four inches from the bottom), but that is my recollection. RCB | ||
| john w. roan (Chessie4905)
Registered Member Username: Chessie4905 Post Number: 2094 Registered: 10-2003 Posted From: 71.58.71.157 Rating: N/A |
I had the fuel filler off, which left a nice sized rectangular hole. I was able to reach down through the hole with an inspection mirror to check. I would think that normal fuel sloshing will keep the debris moving around, so it can be sucked up so you can change the fuel filters frequently? | ||
| FAST FRED (Fast_fred)
Registered Member Username: Fast_fred Post Number: 1554 Registered: 10-2006 Posted From: 76.214.46.131  Rating: N/A |
A tank sump will collect any in fuel water or tank condensation and suck it into the first filter , that's why it has a drain cock.. This is GOOD as the crud only forms on the tank walls in the presence of water . | ||
| Jim Wilke (Jim Bob) (Pd41044039)
Registered Member Username: Pd41044039 Post Number: 642 Registered: 2-2001 Posted From: 184.0.13.120  Rating: N/A |
I was surprised to find that the tank in a 4104 is built exactly the same way. The tank has a 4" depression maybe 3/8" deep right under the pickup. The pickup goes almost to the bottom of that depression so would get almost every drop. There is a drain plug in the middle of the depression, right under the pickup tube. Remember that these buses were designed to run constantly. In revenue service they didn't sit long enough to grow black gunk. And fuel had WAYYYY more sulphur then which inhibited growth of sludge. Keep your tank full & treat your fuel if it sits for long. Carry 4 -6 primary & 2 secondary filters and a gallon of fuel to fill them & you will have more than enough for any situation. I had bad sludge & had to change primary filters every 500 miles before removing & cleaning my tank. (Had to make access hand holes & covers behind each baffle to get it clean!) |