Troubleshooting: Preliminary judgment through the fault phenomenon, the fault may occur in the rear drive axle differential. Because the loader traveling in a straight line, both sides of the wheels at the same time rolled through the stroke is equal. At this time, the differential shell together with the public rotation, this time the differential shell together with the public rotation, this time the differential does not play a role in the differential; when the loader turning driving, the planetary gear not only drives the two half-axis gear rotation, but also around the cross-axis journal rotation, due to the two sides of the wheels on the planetary gear resistance is different, thus making the two half-axis speed is not equal, this time the differential differential play a role in the differential speed. Therefore, the judgment of the failure may occur in the differential.
Remove the rear drive axle and frame connection screws, main drive plate screws, remove the brake pipe joints, etc., with a crane hanging frame, rear axle drive axle launched; release the rear drive axle and both sides of the wheel reducer gear oil, found that the rear drive axle gear oil is too dirty, there are a number of needle-like and flaky metal debris in the oil.
Disassembling the drive axle housing to take out the main drive, differential and 2 half-shafts and 2 wheel reducer sun gear; disassembling the differential housing found: 4 planetary gears in the differential and 2 half-shaft gears and wheel gears are seriously damaged; 4 planetary gears shims only 1 more intact, the rest of the whole was worn out; the active bevel gear, the cross-axle and the differential housing is seriously worn out, drive the bottom of the bridge housing, there are many large and small metal shavings. The bottom of the axle housing has many large and small needle-like and flaky metal shavings.
In analyzing the cause of the failure to ask the operator and check the other working devices. It turns out that the loader is driven by the front and rear axles (four-wheel drive), which are not easy to engage, and not easy to separate after engagement; the operator has never checked the gear oil in the rear drive axle. Due to the gear oil in the rear drive axle is too dirty, so that the planetary gear gasket wear, resulting in the planetary gear and the 2 half-axle gear clearance increased; coupled with the field operation, the terrain is uneven, and often full-load turning operations, resulting in the planetary gear and the 2 half-axle gear gear gear teeth due to the clearance is too large in the high-speed rotation of the broken; the damaged metal debris into the bottom of the rear drive axle and the gear oil, making the The main bevel gear, cross shaft and differential case are severely worn in rotation. However, when traveling in a straight line, the 4 planetary gears and 2 half-axle gears in the differential, with the differential together with the rotation and not rotate, so the rear drive axle has no noise; when driving around the corner, and 2 half-axle gears meshing with the 4 planetary gears, due to the resistance encountered by the unequal will begin to rotate, but also due to the gap between them is too large and meshing gear teeth are damaged, it will be issued "clack, clack, clack, clack, clack" noise, Ka la" noise, the more serious the damage, the greater the noise.
So, the rear drive axle housing and other parts cleaned, replaced the differential and the main transmission, mounted 2 half-shafts, 2 wheelside reducer sun gear and drive axle housing; to the rear drive axle and 2 wheelside reducer filled with new gear oil; with a crane crane frame, drive axle and wheels mounted in place; assembly of the rear drive axle with the frame, the main drive and brakes and so on. Troubleshooting.