Precautions for the inspection and assembly of couplings

Thread Content

Precautions for the inspection and assembly of couplings: 1) The bolts and nuts of the coupling must not be interchanged during inspection, cleaning, and disassembly/assembly. When tightening, turn the nut; do not turn the bolt. 2) Within the design range, the advancement amount of the coupling hub during each assembly should not be less than that before disassembly, with an increase of 0–0.10 mm maintained. 3) Before hydraulic removal or pushing of the gear coupling hub, the connecting gear sleeves should be moved away to prevent the gear teeth from getting stuck or being excessively deformed due to expansion. 4) The high-pressure pump should not have its pressure increased blindly; once the oil pressure reaches the level it was at during assembly, care should be taken to maintain stability of this pressure. Once the inner hole of the hub expands slowly, the pump will release itself from the shaft and come out on its own. The high-pressure oil pump must not be overpressured at any time. 5) The depth of the shaft end’s protrusion or retraction into the coupling hub should be measured at a fixed position, with a measurement accuracy of 0.02 mm. 6) It is strictly prohibited to make any marks on any surface of the coupling components by mechanical means ； It is strictly prohibited to start the high-pressure oil pump without a coupling-mounted propeller or with an excessive propeller clearance.