MAINTENANCE AND OPERATION

 
 
BDS INC.
Box 1160
Malta, MT. 59538
Ph: 406-654-1727
Fax: 406-654-2778
USA Toll Free:
800-775-2478
 
Email: 7pkunze@3rivers.net
 

 

 

 HOW TO CHANGE A SLEEVE

The below sequence illustrates the steps that are involved in changing or replacing a damaged or worn out sleeve on the pneumatic displacement pump. Step 1: In fig 1, remove the two clamps: A from the top of the damaged sleeve, and B from the lower end of the pump body. These clamps can be quickly removed by using a 5/16" socket or an end wrench. On the smaller pumps you may find a punch lock clamp which can be removed with a hacksaw or a thin chisel. Step 2: Separate the lower intake hose from the pump body where it was secured by clamp B, and set the hose aside. (It is sometimes easier to cut off and discard an inch or so of the hose) Step 3: Remove the damaged sleeve as in fig 2. And discard. Step 4: Relocate clamp A to the top of the new sleeve, and Step 5: Slide the sleeve onto the pump body as in fig 3, with the nylon valve positioned towards the bottom. Step 6: Replace the lower intake hose onto the knurled lower end of the pump body and clamp it securely. Step 7: Slide the upper end of the sleeve onto the knurled portion of the pump body at least 1.5"(36.7mm). Step 8: Secure the sleeve to the pump body tightly with the clamp.

The finished assembly should look like fig 4.
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Turn off the air, allow sleeve to deflate, then move the pump a foot or two in the hole to find a more regular wall section. When the borehole wall is as rough as the sketch on the far left, the pump will not seal tight enough to allow pressure to build up and pump water. The pump will usually function properly in a moderately rough hole as shown in the closer sketch. Sometimes all you need to do is deflate the sleeve and allow whatever debris was preventing a good seal to fall past the pump and try again.
USER TIPS FOR BETTER RESULTS

If water doesn’t come to the surface within a few seconds of turning on the air valve, the pump sleeve is probably not making a good seal against the borehole wall.
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A good trick that is effective in areas where the walls of the borehole are smooth and tight, and where there is a lot of water in the hole, is to force the pump into the water so that the lower end of the intake tube is right at the bottom of the hole before starting to pump. Turning on the air will then remove all the water between the sleeve and the bottom of the hole. When that amount is pumped, close the valve, let the sleeve deflate and wait a few seconds while the water above the pump drops down and refills the lower section of the hole. Repeat the pumping process and remove the water from that section again. Continue this sequence until the hole is dewatered. This technique allows complete dewatering of a long column of water without having to move the pump between each pumping cycle.
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TESTING THE PUMP

If you have reason to believe that the pump body-sleeve assembly is not functioning properly, use this method to test it above the ground. You willneed to use the collar saver tube that came with the pump. If that's not available, any sturdy tube or pipe which has an inside diameter close to the diameter of the blastholes, will serve the purpose. Place the tube or pipe with both ends open, on a horizontal surface. Place the pump inside so that the end of the sleeve is at least 6" from an open end. Set the pressure regulator to about 45 psi. Stand clear of the open ends. turn on the air, the sleeve should inflate, and when the pump is working properly, air should only be escaping from the bottom end of the tube.

IF YOU GET STUCK

It’s possible that this pump, or for that matter, anything you put down there, can become lodged in a hole if a piece of rock from the wall or some debris from the around the collar falls in on top of it. If that should happen this mechanism might be loosened by turning the pump on and off while pulling and releasing the hoses. A braided metal line is supplied and attached to the pump body. If the pumped becomes lodged in the hole, this line can be used to assist retrieval when all other attempts fail. Attach the line to whatever mechanical lifting assistance is available, such as a drill boom, a dozer arm, a Bobcat or a loader. Use the line to pull up the pump. It’s probable that the sleeve will be damaged during this procedure, but it can easily be replaced. Use the collar saver tube that was furnished with the pump to minimize this problem when you are working in holes with rough collars.If questions, click here for e-mail contact