Stanley Black & Decker SM50 user manual Troubleshooting, Problem Cause Solution

Page 13

TROUBLESHOOTING

If symptoms of poor performance develop, the following chart can be used as a guide to correct the problem.

When diagnosing faults in operation, always make sure the hydraulic power source is supplying the correct hydrau- lic flow and pressure as listed in the table. Use a flowmeter know to be accurate. Check the flow with the hydraulic fluid temperature at least 80 °F/27 °C.

PROBLEM

CAUSE

SOLUTION

 

 

 

 

 

Pump will not start.

No hydraulic fluid flow or pressure.

Turn on power unit and check that 7–12

 

 

 

gpm/26–45 lpm at 1000-2000 psi/70–140

 

 

 

bar is available at the pump.

 

 

Defective couplers.

Check the couplers. Replace if necessary.

 

 

Impeller jammed with debris.

Clean the pumping chamber as described in

 

 

 

the Maintenance section in this manual.

 

 

Impeller rubbing against wear

Check and adjust the impeller clearance as

 

 

plates.

described in the Service Manual.

 

 

Defective hydraulic motor.

Repair or replace motor.

 

Poor pump performance.

Hydraulic flow reversed.

Check that the hoses are correctly

 

 

 

connected to the pump motor ports. The

 

 

 

female coupler should be connected to the

 

 

 

“IN” port. The return fluid must never flow

 

 

 

through a reversing valve.

 

 

Improper hydraulic fluid flow.

Check that 7–12 gpm/26-45 lpm at 1000–

 

 

 

2000 psi/70–140 bar is available at the trash

 

 

 

pump. A 20% decrease in flow can result in

 

 

 

a 50% decrease in pump performance.

 

 

Pump submersed in sediment.

Lift the pump from the bottom of the hole or

 

 

 

chamber. Use a flat support under the pump

 

 

 

if necessary.

 

 

Trash pump inlet restricted.

Remove suction screen and thoroughly

 

 

 

clean. Reassemble.

 

 

Discharge hose kinked or

Straighten the hose. If the hose must bend

 

 

restricted.

at the top of the hole, use a piece of split

 

 

 

rigid conduit with large diameter of the

 

 

 

expanded hose. This keeps the hose from

 

 

 

kinking.

 

 

Discharge hose too small.

Use a 3-inch diameter fire hose.

 

 

Water lift too high.

Lower the outlet end of the discharge hose.

 

 

 

Increase hydraulic flow (12 gpm/45 lpm

 

 

 

max).

 

 

Impeller worn or damaged.

Check impeller for damage and excessive

 

 

 

wear. Replace if necessary.

 

 

Pump not matched to application

Obtain higher capacity pump.

 

 

Hose used on suction side of

Remove. Use no plumbing on suction side

 

 

pump.

of pump.

 

Poor pump performance

Too many solids in the water.

Reduce solids content. Increase pump

 

with excessive wear.

Water speed out of the hose may

speed.

 

 

be too slow, therefore hose and

 

 

 

pump load up with solids.

 

 

 

 

SM50 User Manual ◄ 13

Page 12 Page 14
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Page 12 Page 14
Contents Hydraulic Sump Pump Weisbeck, Andy Declaration of ConformityTable of Contents Local Safety Regulations Safety SymbolsSafety Precautions N G E R Tool Stickers & TagsHose Types Hose Safety TagsTool to Hydraulic Circuit Hose Recommendations Hose RecommendationsHtma / Ehtma Requirements Htma / Ehtma RequirementsOperation Preoperation ProceduresPump Operation Cold Weather OperationCleaning the Pumping Chamber Tool Protection & Care Problem Cause Solution TroubleshootingAccessories SpecificationsSM50 Parts Illustration SM50 Parts List Underwater Models only Underwater Tools Depth Guideline

SM50 specifications

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