John Deere AC-3500GSH User Manual

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John Deere Operator's Manual

ENGINE:  The engine instruction manual accompanying your unit, lists specific 

procedures for maintenance of the engine. Following the engine 

manufacturer's recommendations will extend engine life.

PUMP:  

Change  the  pump  oil  after  the  first  50  hours  of  operation.  

After  initial  change,  every  3  months  or  250  hour  intervals  are 

recommended.    If  oil  appears  dirty  or  milky,  changes  may 

be  required  in  greater  frequency.    Use  John  Deere  pump  oil 

#AW-4085-0016 and fill only to the center of the oil sight glass.  

DO NOT overfill.

 

COUPLERS:  There are o-ring seals inside the couplers which will deteriorate.  

To replace, simply install a replacement o-ring to correct the leak.  

(Additional o-rings can be purchased from your dealer.)

NOZZLE:  Water flow through the spray nozzle will erode the orifice, making 

it larger, resulting in a pressure loss.  Nozzles should be replaced 

whenever pressure is less than 85% of the maximum. The frequency 

of replacement will depend upon such variables as mineral content 

in the water and number of hours the nozzle is used.

FUEL WATER SEPARATOR:  The fuel filter has a built in water separator.   

Occasionally the water has to be drained from the separator.   

Follow the procedures listed below:

 

 

 

1.  Check the collection bowl daily.

 

 

 

2.  Ensure the unit is off and place an oil catch basin under the  

 

fuel  cartridge.

 

 

 

3.  Loosen the drain plug to allow the fuel/water contaminants to  

 

flow into the catch basin.

 

 

 

4.  Retighten the drain plug when completed.

 

 

 

5.  Dispose of drainage according to environmental regulations  

 

in your area.

BURNER AIR ADJUSTMENT:    The  air  shutter  has  been  factory  preset  for  

proper  operation  between  sea  level  and  2000  feet  elevation  at 

standard conditions (60°F ambient water and air temperatures).  To 

assure maximum combustion efficiency at  colder temperatures and 

higher altitudes, it will be necessary to adjust the air supply to the 

combustion chamber.  A smoke spot test is recommended during 

any air shutter adjustment.  This will aid in maximizing the burner 

efficiency and avoid inefficient operation and excessive sooting of 

the combustion chamber.

 

 

 

1.  The machine must be running and the burner ON.

 

 

 

2.  Take a smoke spot test to determine if more or less air is  

 

required for proper combustion.

 

 

 

 

 

a.  If the test is greater than a #3 smoke, turn the shutter  

 

 

  arm 

counterclockwise to increase the air flow into  

 

 

  the combustion chamber.

 

 

 

 

 

b.  If the test is yellowish in color, turn the shutter arm 

 

  

  clockwise to decrease the air flow into the   

 

 

 

  combustion chamber.

 

 

 

3.  Hold onto the air shutter adjusting arm and loosen the locking  

 

nut. Move the shutter in 1/8" increments and retighten the  

 

locking nut after each 1/8" movement.

 

 

 

4.  Trigger  the  gun  on  and  off  slowly  to  make  sure  there  is  

 

proper  ignition. Slight or no puffing on the ignition, and a smoke  

 

spot test of less than #3 smoke is good.

 

 

 

5.  Repeat steps 2 and 3 until step 4 is attained. 

LEAKS: 

Promptly  eliminate  any  leaks  found  in  the  pumping  system  by  

removing  suspect  parts,  applying  thread  sealant  to  the  threads  

and reinstalling.