Some common problems encountered in the operation of Niigata plunger pumps and their solutions

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In the Niigata plunger pump, the total stroke L of the plunger’s back-and-forth movement remains constant, and it is determined by the lift of the cam. The amount of oil supplied per cycle by the plunger depends on the oil supply stroke, which is variable and not controlled by the camshaft. The start time of fuel supply does not change with variations in the fuel supply stroke. The rolling plunger can adjust the end time of fuel supply, thereby changing the amount of fuel supplied. 1. What are the causes of excessive temperature in the oil tank at the power end of the Niigata plunger pump? How to clean it? Answer: (1) Cause of the problem: ① Degradation of oil quality. ②Too little or too much oil. (2) Cleaning method: ① Replace the lubricating oil. 2. How does insufficient power in the Niigata plunger pump occur? How to clean it? Answer: (1) Cause of the problem: ① Insufficient motor power. ②The drive belt is loose. (2) Removal method: ① Replace the motor to match the plunger pump. ②Adjust the belt tension. 3. What are the reasons for oil leakage from the floating sleeve of the Niigata plunger pump? How to clean it? Answer: (1) Cause of the problem: ① Damaged seal. ②The spring has cracked. (2) Removal method: ① Replace the seal. ②Replace the spring.