Routine maintenance is, of course, part of getting the right mix, every time. Routine maintenance is covered more fully in the OEM and STS Operator’s Manual included with each unit. You can also find a printable copy of the STS Manuals if you click here.  Printable copies of the OEM manual are usually available on the website of the manufacturer.

AN IMPORTANT NOTE: In the mixing of a liquid with a dry product, dusty conditions are normal and dust poses the most common equipment problems.

We have compiled some brief notes on routine maintenance items. Remember more detailed maintenance information is available in the operator’s and OEM manuals.
Conducting routine maintenance extends the life of your equipment and allows it to deliver the best result on your job site.

Gasoline & Diesel Engines (disconnect battery, remove the key starter or remove the spark plug cable)  
   
  Check engine oil level daily and change oil / filter at regular intervals as stated in the manual.
  Change air filters elements regularly and maintain pre-cleaners as a first defence.
  Check fluid levels daily.
  For NEW engines refer to the OEM manual for “break in “ instructions for maintenance.
  Adjust engine components (valves, carburetor, etc.) as stated in the manual.
  Keep engine clean of dust build-up to allow for proper airflow cooling.
  Clean radiator of dust build-up regularly to allow for proper air flow through the core fins
  Regular lubrication of push / pull cables and pivot points will keep them operating smoothly.
   
Electric Motor and Electric circuit (disconnect and lock out the power source)
     
  Visually check the electrical connections to the motor and switch for frayed wires or damaged cable grips and that the connection box on the motor is sealed and intact.
  Clean dust and debris build-up off the air fins on the outside of motor housing to achieve better air flow and heat dispersal of the motor.
  Keep the air circulating fan fins (under the guard at the rear of the motor) clean to allow the fan to move more air across the motor housing for cooling.
  Using good quality grease, lube the bearing block with 1 pump from a hand held grease gun, every 500 hours. DO NOT OVER-LUBE as this can lead to overheating and bearing failure.
  Routinely remove the guard over the drive coupler and check the rubber insert of the drive coupler for wear or damage. This can be done by visually looking for damage and also by grasping each coupler with your hands and trying to rotate the shafts in different directions.
   
Hydraulic Motor & System (disconnect and lock out power source)
 
  Change hydraulic filter as recommended.
  Check hydraulic fluid level daily.
  Look for dampness around hydraulic fillings and on hoses. This indicates a leak and should be repaired immediately.
  Keep the hydraulic cooler (if equipped) clean and free of dust build-up. This will help to keep the hydraulic fluid temperature cooler and prolong the life of the equipment.
   
Gorman Rupp Trash Pump (drain fluid from system)
     
  Keep grease cup full and the “lug” backed off to keep grease pressure flowing to the seal.
  Remove plug from bottom of pump and rinse with fresh water.
   
Monarch Trash Pump – for models purchased prior to 2010 (drain fluid from system)
 
  Monarch pumps require the front cover to be removed on a regular basis and the volute to be tightened up as it will become loose as wear on the back housing increases. If this is left unchecked, the studs may break off and cause serious internal damage.
  When the front cover is removed, check the gap between the volute and impeller. If the gap is large, the impeller should be shimmed out (refer to the manual for instructions).
  Remove the front cover and rinse out the inside of the pump and its components.
   
Piping System (drain fluid from system)
 
  Clean filter shear on a regular basis. Daily if possible, and weekly as a minimum.
  Rinse mixing Tee with wash wand after mixing a new batch.
  At the end of the job drain down the reservoir tank to within 3-4” and when moving from one site to another, the remaining fluid left inside of the tank will swirl around and mix with any sediment inside of the tank or completely remove all of the fluid and rinse out the tank with fresh water.
  Lubricate all valve handle pivot points to keep them working smoothly.
  Check that fluid is flowing from the internal jet gun ports (holes).

Remember to review your OEM and Operator’s manuals included with your unit upon purchase. These brief notes are here for reminders to our customers about the ease and importance of maintaining your equipment for best result on the job site.

In the mixing of a liquid with a dry product, dusty conditions are normal and dust poses the most common equipment problems.



 
STS offer their product line on a lease basis. You can get the best mixer in the HDD industry on a lease
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