Question about Desa International Kerosene Portable Forced-Air Heater

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Pump pressure can not increase pressure by turning screw in,only has 1 lb pressure so shuts off

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Check your filters to see if they are clogged. It also could be a defective rotor. If you need a new filter kit or rotor. You can find them online at www.masterparts.net if you need the part numbers you will have to call there parts department at 888-917-2244.

I hope this helps...

Posted on Mar 06, 2009

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Throw it away, i have 6 desa heaters that cost me more in maitenance than a new one trow it away and buy a new one

Posted on Jan 08, 2009

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Posted on Jan 02, 2017

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What causes my booster pump to increase pressure even after I shut power and or water supply off?


something wrong here. your incoming pressure is 4 psi ( tank pressure to the pump and you use a pump to boost pressure to a maximum of 65 psi at which point the pump is shut off ( all taps close off)
yet with no pumps running the pressure goes up to 100 psi
Find where you are getting pressure in that is making the pump leak
if you have 100 psi to the pump when it is turned off, then it would not be turning on ( power on) as the shut off pressure is set at 65 psi and the line pressure is 100 psi

Sep 27, 2016 | Grundfos MQ3-45 1 HP Pressure Booster...

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I have a MASTER MH-75T-KFA kerosene forced air heater that runs a few seconds and shuts off. Air filter is clean and even does this with filter removed. Manual says fuel pressure should be 4.o psi. Guage...


I assume this has an electric blower and probably electric fuel pump? Does it have a fuel filter somewhere in the system? I'd try to return the fuel pressure adj. screw to factory setting. I'm guessing screw in decreased flow rate and out increases flow rate. If fuel pressure is measured on the burner side, then increasing flow rate should increase pressure. It's intuitively backwards. What does customer service say? Usually, they are helpful. They need to know there's a customer problem.

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I have a flotec 1 hp pump. Wife washed 3 loads of clothes in a row and noticed we run out of water a while later. I shut pump off and noticed pressure tank low on air. I put 18 lb. air in tank and...


If in the past your system can build-up pressure up to 40 psi even if the supply valve is open and water is being used in your house, then your pump impeller maybe already worn out that's why its pumping capacity was reduced.

Nov 12, 2012 | Flotec Corrosion Resistant Shallow Well...

1 Answer

Running very rich. how to adjust fuel and air screw


First of all are you running kerosene or diesel ? If you are using diesel, it does not burn as clean as kerosene which causes that burning rich smell. If you are going to use diesel, just use #1 diesel only but still may have a little rich smell. Don't use die red off road diesel. If you are using kerosene and want to check your air pressure on your pump, you will need a 10 lb. test gauge with a 1/8" NPT male pipe thread on the end of the gauge.There are 2 plugs on the back plate. Do not remove the upper plug with the hole in it. This is the adjustment screw for pressure. Clockwise increases pressure, counter clockwise decreases pressure. With the heater unplugged,remove the lower plug. Screw the test gauge in and start the heater. Check the pressure. Most are set between 5 1/2 and 6 lb. of pressure. Check your owners manual to see what your setting should be. If your pressure does not change, you have a worn pump and it would have to be repaired. Once you have the correct setting, unplug the heater, remove the gauge and install the plug back. If you feel that you are not qualified to perform this procedure, send it in to a local repair center.

Jan 11, 2011 | Reddy Heater-170,000 BTU Kerosene Deluxe

1 Answer

Will not pick up fuel to fire up


Your unit has a air pump behind the electric fan motor. This pump is what produces low pressure air across the nozzle which causes a suction for the fuel pick up tube from the tank. Check your fuel filter first. If you are not getting any fuel spraying out the end of the heater, your air pump needs to be looked at. There are carbon vanes on a rotor inside the pump. They could be stuck in the slots of the rotor. Don't mess with any of the plastic plugs on the back cover unless you have the tools to test. Just remove the steel screws that hold the cover on. There will be another set of screw inside,remove them to get to the rotor and carbon vanes. If they are not stuck, your air pump may just need to be turned up. You will need a 10 lb. pressure gauge to test the pressure. It screws in to the 1/8" threaded hole (usually has a plasic plug) thats where the gauge screws in. The pressure on most heaters is 5.5 to 6 lbs. setting. The adjustment is the plug above the gauge test port. Turn clockwise to increase pressure/ counter clockwise to decrease pressure. Be careful because this will also increase more fuel to the combustion chamber. If turned up to high, you will get a large flame shooting out the end of the heater. If you do not have experience with working on the heater, and do not feel comfortable doing it, get someone else to help you that does. Good luck.

Jan 03, 2011 | Reddy Heater-170,000 BTU Kerosene Deluxe

1 Answer

Pump cycles like crazy!!


Sometimes a new tank the blatter will be kinda sealed to the sides of the tank.the amount of air in the tank s/b equal to the cut in pressure of the pressure switch.(40 lb) that would be (60 lb) cut out if you messed with the little screw on the pressure switch you have a problem.there must be the 20 psi of differance between start and stop.

May 13, 2010 | Flotec Corrosion Resistant Shallow Well...

2 Answers

Pressure setting of series 90 pumps


Yes 90 series pumps will run pretty close to 6000 psi. there are cross port reliefs built into the endcap of the pump and usually a POR valve as well. so the POR should be set at 3000, the cross ports in the pump should be set higher than this. There may also be a "transmission block" which is a seperate block with hot oil shuttle and cross port reliefs. Make sure these reliefs are also set higher than the POR valve in the pump. There may also be cross port reliefs in the motor. These too must be set higher than the POR valve in the pump. If you system overheats after increasing the pressure setting of the POR valve, you are probably loosing oil across one of the cross port relief valves.
Please visit http://hansonhydraulics.blogspot.com for more information. I** If am electric motor is being used to drive this pump, be sure you have sufficient horse power for this increased load. **

Jan 29, 2009 | Danfoss Sundstrand-sauer-danfoss...

1 Answer

Jeep grand cherokee revs for to high before changing gear


Message:
My 2002 Dakota has been somewhat confused about shifting as well. It showed a code P1762. I dropped the pan to install a new fluid filter and fluid-(use only ATF+3 or ATF+4). Since the pan was off I decided to adjust the bands. The front band controls the 2nd gear cluster. The rear band controls the 3rd gear cluster and reverse. For a 2-3 shift, the transmission shifts back to 1st gear with the front band while the rear band engages 3rd gear. If the front band does not release the 2nd gear clutches before the third gear clutches engage, the transmission binds, which shortens the life of the transmission clutches. If the front band releases too early in the shift, the engine will overspeed (sounds and feels like a slip) during the 2-3 shift.
The front band adjusting screw is on the driver's side above the shift linkage. The rear band is inside the fluid pan near the filter.
1. Loosen band adjusting screw locknut. Then back locknut off 3-5 turns. Be sure adjusting screw turns freely in case. Apply lubricant to screw
threads if necessary. The front band adjuster is on the outside of the transmission and the locknut requires a 3/4" wrench.

2. Using Inch Pound Torque Wrench C-3380-A, a 3-in. extension and appropriate Torx� socket (T-40), tighten adjusting screw to 72 in-lb. CAUTION: If Adapter C-3705 (from SPX Miller) is needed to reach the adjusting screw, tighten the screw to only 47-50 in. lbs. torque.

3. Back off adjusting screw the number of turns listed below for your transmission.

4. Hold adjusting screw in place and tighten lock-nut to:

41 N�m (30 ft. lbs.) for the front band
34 N�m (25 ft. lbs.) for the rear band
The adjustment screw inside the case is a square head bolt. You will need a 1/4 square head socket to fit your torque wrench.
Band adjustments for each model year:
1994

* Front Band - tighten to 72 in-lb, back off 2-1/2 turns (all transmissions)
* Rear Band
o 32/42RH - Tighten to 72 in-LB, back off 4 turns
o 36/37/46/47RH - Tighten to 72 in-lb, back off 2 turns

1995-1996

* Front Band
o 42RH - tighten to 72 in-lb, back off 2-1/4 turns
o 46RH - tighten to 72 in-lb, back off 2-7/8 turns
o 47RH - tighten to 72 in-lb, back off 1-7/8 turns
* Rear Band
o 42RE/RH - tighten to 72 in-lb, back off 4 turns
o 46RE/RH - tighten to 72 in-lb, back off 2 turns
o 47RE/RH - tighten to 72 in-lb, back off 3 turns

1997-1998

* Front Band
o 42RE - tighten to 72 in-lb, back off 3-5/8 turns
o 46RE - tighten to 72 in-lb, back off 2-7/8 turns
o 47RE - tighten to 72 in-lb, back off 1-7/8 turns
* Rear Band
o 42RE - tighten to 72 in-lb, back off 4 turns
o 46RE - tighten to 72 in-lb, back off 2 turns
o 47RE - tighten to 72 in-lb, back off 3 turns

1999

* Front Band
o 42RE - tighten to 72 in-lb, back off 3 turns. (TSB 21-16-98)
o 47RE - tighten band adj. screw to 72 inch pounds, back off 1 7/8 turns
* Rear Band
o 47RE - tighten band adj. screw to 72 inch pounds, back off 3 turns
+ The 47RH rear band requires a 1/4" hex driver, the front band requires a
T-30 Torx driver, the filter is held in place by two screws which require a T-20 Torx drive

2000-2002

* Front Band
o 42RE - Tighten band adj. screw to 72 in-lb, back off 3 turns
o 44RE - Tighten band adj. screw to 72 in-lb, back off 1 7/8 turns
o 46RE - Tighten band adj. screw to 72 in-lb, back off 2 7/8 turns
o 47RE - Tighten band adj. screw to 72 in-lb, back off 1 7/8 turns
From Bill Konolday's 47RE notes: I usually go a little looser than factory
specs on this front band - backing off the adjustment screw 2 or 2 1/4 turns.
Depending on the circumstances I have backed off the band up to 2 1/2 turns.
* Rear Band
o 42RE - tighten band adj. screw to 72 inch pounds, back off 4 turns
o 44RE - tighten band adj. screw to 72 inch pounds, back off 4 turns
o 46RE - tighten band adj. screw to 72 inch pounds, back off 2 turns
o 47RE - tighten band adj. screw to 72 inch pounds, back off 3 turns

2003

* Front Band
o 48RE - tighten band adj. screw to 72 inch pounds, back off 1-3/4 turns
* Rear Band
o 48RE - tighten band adj. screw to 72 inch pounds, back off 3 turns

2005

* Front Band
o 48RE - tighten band adj. screw to 72 inch pounds,
back off front band adjusting screw 1-3/4 turns for diesel vehicles,
or 1-1/2 turns, for V-10 vehicles.
* Rear Band
o 48RE - tighten band adj. screw to 72 inch pounds, back off 3 turns

94+ Automatic Transmission Bolt and Nut Torque Specs

* Front band adjustment locknut - 30 ft-lb
* Rear band adjustment locknut - 25 ft-lb
* Transmission pan bolts - 13 ft-lb
I just replaced the solenoid with the recommended transducer and all is fine now. The transducer cost me about $50 at a nearby dealership.
Hope this helps. -zman. rroszman@yahoo.com

Dec 09, 2008 | 2001 Jeep Grand Cherokee

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