The General Problems and Solutions of Long Stroke Pumping Unit
| Problems | Reasons | Solutions |
| Pumping unit working unstable, such as vibration | Too much gas accumulated in the wellhead | Remove accumulated gas |
| Cement foundation uneven | Pad the cement foundation or reinstall it if necessary | |
| Base of pumping unit uneven | Pad the base and tighten the foot nut | |
| Foot nut of pumping unit looseness | Tighten the foot nut | |
| Pumping unit suspension center misaligned with wellhead | Adjust pumping unit to align suspension center to wellhead | |
| Rod overload | Inspect the downhole Load based on suspension Load | |
| · Suspension wheel bracket retaining bolt unscrewed | · Check retaining bolts and tighten nuts | |
| · Transition wheel fault | Inspect transition wheel | |
| · Guide wheel and guide rail of counterweight box fault | Check guide wheel and guide rail of counterweight box | |
| Pumping unit shaking | Problems with downhole pumps | Check or replace pump |
| Friction between sucker rod and tubing | Check and repair | |
| Traction belt operate abnormal
Rod Connector skew |
The tightness of the two traction belts different | Adjust the traction belt to make the two traction belts tighten equally |
| The connection of the traction belt looseness | Check the traction strap connection | |
| Traction belt adjusting nut not tightened | Tighten the screw nut | |
| Link flabby between rod hanger and rod | Clip specifications incorrect | · Replace the appropriate clip |
| · Clip teeth wear | · Replace the clip | |
| Starting difficulty or reciprocating power different obviously | Counterweight box weight insufficient | Increase counterweight |
| Traction power insufficient | Check the electromotor and transmission system | |
| Electrical control system fault | Check electrical control system | |
| Distribution box abnormality | Control system fault | Check and troubleshoot |
| Power train overheated and noisy | Power train retaining bolt looseness | Tighten the power train retaining bolt |
| Power train bearing worn | Replace the bearing | |
| Power train internal fault | Troubleshoot | |
| Brake Fault | Brake rigging fault | Check and troubleshoot |
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