D7g, D7r, D8k Bottom Roller for Bulldozer Parts Caterpillar

Our company has been engaged in the Front Idler Dx300, Track Link R330LC-9S, Boom Cylinder Assy industry for many years and devoted to customers premium products with a professional technology and reasonable price. Welcome new and old customers to inquire and patronize. We adhering to the corporate management and brand marketing concepts of 'professional, honest, pragmatic, rigorous and innovative'. We also have good cooperation relationships with many good manufacturers so that we can provide almost all of auto parts and after-sales service with high quality standard, lower price level and warmly service to meet demands of customers from different fields and different area.

long life bulldozer track roller for caterpillar excavators:

The function of the bulldozer lower roller is to transfer the weight of the locomotive group to the ground and roll on the track. In order to prevent derailment, the supporting wheel should also be able to prevent the relative lateral movement of the track on it.

Bulldozer bottom roller often work in mud, water, lime and sand, and bear strong impact. The working conditions are extremely bad, and the rim is easy to wear and tear.

The requirements for supporting wheels are: wear-resistant flange, reliable bearing seal, low rolling resistance, etc.

Easy-to-come problems

 (1) Wheel wear. The reason for this is that the steel used is not qualified or the hardness of the material is low and the wear resistance is insufficient during heat treatment.

 (2) Oil leakage. The bearing axle rotates all the time through the sleeve, and the inner part of the wheel needs oil to lubricate. But if the sealing ring is not good, it is easy to cause oil leakage. In this case, the axle and the sleeve are easy to wear and tear without lubrication, resulting in the product can not be used. There are several reasons for oil leakage: 1. Unqualified floating oil seal; 2. Insufficient circularity of product sleeve; 3. Insufficient gloss of support shaft; 4. Unqualified gear oil; 5. Processing dimension tolerance and so on. All these problems will cause the oil leakage of the supporting wheels.

Oil Leakage Inspection and Elimination

1. In the process of installation, strict inspection shall be carried out according to the technical requirements of the parts, so as to keep them clean and prevent impurities from entering the installation surface. Especially the sealing face of the sealing ring, even if there are small dust particles, it will destroy the sealing and cause oil leakage.

2. Seal sleeve and rubber ring need to be replaced for aging, deformation, scarring and rupture.

3. Spring should be replaced when its elasticity is insufficient. Its end surface is uneven and can be ground flat. When the coil is warping, it should be repaired and trimmed, and the sharp edges should be removed.

4. Large and small sealing rings are not in strict contact and can be re-grinded to make them have uniform and continuous grinding rings. Do not touch the end of the ring and disturb the spouse ring. The thickness of the ring should be the same, otherwise it must be replaced.

5. The thickness of rubber ring is not enough. It is allowed to wrap asbestos rope to achieve a tightness of/0.15-0.20 kg per square centimeter.

6. Bending of axle, non-circular or neck wear, wear of supporting wheel hub and sealing shell matching belt must be repaired.

7. When bearing and seal ring are worn in plane, oil-resistant rubber rings 2-4 mm thick can be padded between seal sleeve and hub end face according to the degree of wear. After installation, the sealing sleeve assembly shall be able to rotate freely on the hub. In addition, the bearing wear can be compensated by a gasket with an outer diameter of 100 mm, an inner diameter of 85 mm and a thickness of 1.5 mm between the bearing outer ring and the shoulder of the support platform of the sealing shell. When the height of the seal sleeve is less than 32 mm and the width of the bearing is less than 41 mm, new products should be replaced.

8. Paper cushions on supporting wheels should be kept intact and non-destructive, with appropriate thickness.

 

PARAMETERS OF BULLDOZER TRACK ROLLER
ITEM	MODEL	A	B	C	D	E	F	G	I	L	M	N	P	R	S	T
1	D20	155	135	106	130	194	264	147	78.5	15	82	18	44
2	D3C	178	152	125	155	230.5	274	175	88.5	13.5	101.6	18	58	30	58	171
3	D30	198	170	123	154	240	295	195	100	17.5	102	28	54	30	54	182
4	D4D	230	203	141	174	298	359	222	114.5	17	88.9	29	73	41	73	219
5	D5D	233	204	172	208	317.5	380	240	117	17	101.6	30	84	50	84	228
6	D50	233	204	172	208	310	380	240	117	18	110	30	84	50	84	228
7	D6D	246	210	189	228	330.2	400	255	120.8	20.5	114.3	31	96	59	96	237
8	D60	245	210	196	235	320	394	260	121	19	114	35	90	64	100	236
9	D7G	256	222	205	248	368.3	440	288	127	23	114.3	41	102	62	102	245
10	D85	258	220	210	252	380	452	306	126	23.5	136	35	100	62	106	248
11	D8K	299	256	248	296	426.6	504	338	128	27	133.4	37	117	79	120	280
12	D155	296	258	244	292	408	498	320	147	26	140	40	100	74	118	285
13	T90	216	185	173	209	298	350	217	113	18	100	36	79	50	79	210
14	T220	257	222	209	251	380	449	306	127	23.521.5	136	34	98	60	99	249
15	T160	244	210	196	235	320	400	258	121	19	114	33	102	62	100	236

Based on the original products, our company continuously introduces new technologies and develops various new D7g, D7r, D8k Bottom Roller for Bulldozer Parts Caterpillar to meet the needs of the market. We not only pay attention to the quality and efficiency of the economic development of the enterprise, but also pay more attention to the sustainability of economic development. In recent years, with the strong support of customers and the joint efforts of all employees, our company has made rapid development by continuously strengthening enterprise management and innovation.

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