source:Geerady       date: 2022-06-17
Removing the main decelerator drive shaft, scrolling its input shaft with hand, found that there is a self-rolling void near 30 ¡ã, so it is determined that the main speed driver engagement void is too large. Remove the main reducer, measured its engagement void of 0.65 mm (the specification value is 0.30 0.50 mm). Conditioning the taper teeth, making it 0.35 mm from the meshing gap of the automatic cone gear.
Re-assemble the test machine, there is still an unmisting shock scene while hanging each gear and announces an abnormal sound. The degree is only slightly reduced, but the hairy is old.
To this end, the drive is removed again, so that the transmission is in a no-load condition, engage the engine, repeat the mounting, returning, lift test, and finds that the abnormal sound of the mounting instant is still present, and the transmission has a more significant oscillation View the support fixing bolts of the transmission without loose.
According to this scene, the problem should be inside the transmission. Removing the transmission displacement, cleaning, detection, discovery that the mains of each blocking clutch, the tapered roller bearing of the driven shaft is loosened; the bearing to adjust the bearing to a suitable void by increasing or decrease the gasket, and reloading the test machine, hanging The shock and abnormal scenes have weakened, but the shortage of problems still exist.
By this detailed view of the fundamental factor that has not been found yet, if there is a disadvantage of the type forklift planning or production? So, I found a forklift produced by the factory in the same model. The road test, the results found that there was a subtle homogeneous shock scene, and only the severity was different. Therefore, the lookup of the problem should be placed at the liquid handling part of the transmission.
Refer to the machine transmission schematic diagram and part book, the clutch piston is completed by the preload of the bonding, so, in the hanging gear, the main clutch may have an excessive pressure control oil flow. The situation, therefore rapidly defeats the boom, so that the automatic sheet and slave are more fast and the gear shock occurs, just like the impact of the hard-proof main clutch operator pedal is too fast.
In order to verify this envision, it is necessary to modify its liquid handling line, and a conditionable flow valve is connected in series between the reversing valve and each clutch piston, manipulate its flow, so that it can reach the smooth intention.
Through the above transformation, the engine, the engine, and the trial, returning, lift gear, adjust the throttle valve, and the hinges are excluded. If the throttle opening is too large, there is no way to rectify; if the throttle opening is too small, the problem of hanging impact can be handled, but it will present a new problem with the driving and clutch slip. The adjustment of the throttle valve is hung when the engine idles is idling.
At this time, the fundamental factors of the problem were found to be a clutch automatic sheet and the slave engagement was too fast, and because the main speed driver's main, the driven gear meshing the gap was too large and the bearing of each block was plunged. Shock sight.
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