Maintenance of excavator slewing bearing and swing circle

Excavator slewing bearing also names turntable bearing,slewing circle,turntable circle,swing bearing,swing circle,slewing ring.

The swing bearing is an indispensable transmission device in the slewing system of an excavator. Users who have used the slewing ring should know that a certain amount of wear and loss will occur after the support is used for a period of time. The main reason for the wear of the slewing ring of the excavator is :

1. When purchasing a slewing bearing, the model is matched incorrectly. When the tooling is connected, the speed will not match, and the excessive load will cause the inner and outer teeth to wear;

2. The swing circle is designed for the tooling model and the selection of materials. If the selection is improper, it will cause the slewing ring to wear faster.

The following editor will introduce you to the maintenance and maintenance methods of the slewing ring

1. Regularly check the pre-tightening force of the slewing ring bolts. The slewing ring is used for 100 hours to 500 hours, which is a working cycle. After the equipment is stopped, the bolt pre-tightening torque should be checked one by one. After a period of running-in period, every 1000 hours is a working cycle, stop the machine to check the bolt pre-tightening force.

2. When the slewing ring is used, attention should be paid to the changes in operating noise. If there is noise in operation, it must be disassembled immediately to eliminate the fault;

3. When pre-tightening the nut, evenly spread the lubricating oil between the bolt and the nut, and use the matching wrench to tighten it clockwise several times.

4. When storing slewing bearings, they should be hoisted and stacked horizontally. Do not lift vertically to prevent deformation of the rolling ring;

5. The bolts and nuts used in the slewing ring should be selected according to the bearing curve of the slewing ring bolts. When installing, the double nuts are tightened to prevent loosening.

6. There are 4 oil cups distributed on the inner and outer ring gears of the slewing ring, and grease is added to the raceway from the oil cup. Under the guidance of Fenghe intelligent technicians, the slewing ring has a cycle every 50 hours. Each time you add grease, you must add enough grease until the grease leaks out of the seal.

 

fortunepart slewing swing bearing for excavator model list

Fit for Brand	Excavator and bulldozer Model List
KOMATS U	PC20	PC30	PC35	PC40	PC45
	PC60-1-3-5-6-7	PC75	PC100-3-5	PC120-3-5	PC150
	PC200-1-3-5-6-7-8	PC220-1-3-5-6	PC240	PC300-1-3-5-6-7	PC350
	PC400-3-5-6	PC450	PC650	PC750	PC800
CATERPILLA R	E55/E55B	E70/E70B	E110/E110B	E120/E120B	E180
	E215	E225DLC	E235	E240	E300B
	E307	E306	E305	E311/E312	E320/E200B
	E322	E324	E325	E330	E339
	E345	E349	E450
HITACH I	EX30	EX40	EX55	EX60-1-2-3-5	EX70
	EX100-1-3	EX120-1-3-5	EX150	EX200-1-2-3-5-8	EX220
	EX230	EX270	EX300-1-2-3-5-6	EX400-1-2-3-5	EX600
	UH043	UH052	UH053	UH07	UH081
	UH082	UH083	ZAXIS 60	ZAXIS 200-3-6	ZAXIS 240
	ZAXIS 270	ZAXIS 330	ZAXIS 360	ZAXIS 450	ZAXIS 870
	ZAXIS 110	ZAXIS 120
BULLDOZER	D20	D3	D30	D31	D3L
	D3C	D37	D3D	D4C	D40
	D4D	D4H	D41	D45	D50/D5/D5B
	D53/D57/D58	D60/D65	D6D/D6	D6C	D6H
	D65=D85ESS-2	D75	D7G/D7R/D7H/D7	D80/D85	D85A-12
	D8K	D8N/R/L/T	D9N	D85EX-15	D150
	D155	D275	D355
KATO	HD80	HD140	HD250	HD400(HD450)	HD550
	HD700(HD770)	HD820(HD850)	HD880	HD900	HD1023
	HD1220	HD1250	HD1430	HD2053
SUMITOM O	SH60	SH70	SH100	SH120	SH200
	SH210	SH220	SH280	SH300	SH320
	SH350	SH360	SH400	SH450	SH460
	LS2800FJ	S340	S430
KOBELC O	SK60	SK70	SK75	SK07-N2	SK07/2/7
	SK100	SK120-3-5-6	SK125	SK160	SK200-1-3-5-6-8
	SK210	SK220-3-6	SK230	SK250	SK260
	SK300-3-6	SK320	SK330	SK400	SK480
DAEWOO	DH55	DH60	DH80	DH130	DH150
	DH200	DH220	DH215	DH220	DH258
	DH280	DH300	DH360	DH370-9	DH400
	DH420	DH500	UH07	K907C
HYUNDA I	R60	R80	R130-5-7	R150	R200
	R200-5	R210	R210-7	R215-7	R220-5
	R225-7	R260-5	R265	R290	R300-5
	R305	R320	R385	R420	R450-3-5
VOLV O	EC55B	EC140B	EC210	EC240	EC290B
	EC290B PRIME	EC360	EC460	EC700
KUBOTA	KX35	KX50	KX85	KX135	KX155
	KX161
DOOSAN	DX60	DX200	DX300	DX340
LIEBHERR	R914	R916	R926	R934	R944
	R954	R964	R974
YUCHAI	YC35	YC60	YC85	YC135
CASE	CX55	CX75	CX135	CX240	CX360
	YM55	YM75	CX310
TAKEUCHI	TB150	TB175
LIUGONG	LG150	LG200	LG220	LG925	LG936
SAN Y	SY65	SY90	SY130	SY215	SY335
	SY365	SY6385
	XG60	XG80	XG120	XG200	XG330
	XG370
	SE210LC	SE280LC
Mitsubish i	MS110/MS120	MS180	MS230	MS280

 

 

 

 

The CAT D8 bulldozer performs outstandingly in construction operations, relying on the excellent performance of its components. Its engine serves as the core power source, adopting the Caterpillar CAT 3406C TA engine. With a large displacement of 14.6L, a cylinder bore of 137mm and a stroke of 165mm, it can output a power of 228kW, easily handling complex working conditions and ensuring the efficient operation of the equipment.

The transmission system is extremely sophisticated, with multiple gears set. The speed of the first gear is 0 - 3.5 km/h, suitable for fine operations such as trench excavation, allowing for precise control; the speed of the second gear is 0 - 6.2 km/h, balancing efficiency and control, and is suitable for regular earth - moving work; the maximum speed of the third gear reaches 0 - 10.8 km/h. When moving over long distances or working in open areas, it can move quickly, improving work efficiency.

In addition, the hydraulic system ensures the stable operation of working devices such as the bulldozer blade. All components work in coordination, making the CAT D8 bulldozer a reliable partner in construction projects and creating greater value for enterprises.

Xiamen Doolin Machinery Co Ltd can provide you with track idler, track rollers, sprocket, carrier rollers,track link,track shoe, bolts and nuts for CAT D8 bulldozers. If you have any needs, you are welcome to contact doolincm at any time!

No.	Part No.	Descreption
1	6Y-0556	Front idler
2	6Y-0553	Rear idler
3	384-2953 (384-2955)+B7	Assembled track kit (560mm shoes)
4	155-3653	Ripper lift hydraulic cylinder
5	347-3272	Ripper tilt hydraulic cylinder
6	393-7454	Blade lift hydraulic cylinder (left)
7	393-7455	Blade lift hydraulic cylinder (right)
8	392-6854	Hydrostatic pressure regulator
9	392-6855	Hydrostatic pressure regulator
10	374-3470	Transmission pump
11	5P-7665	Segment bolt
12	7Н-3608	Segment bolt nut
13	6V-3608	Segment bolt washer
14	110-3391 (Agree with the customer)	Torque transformer
15	234-8945	Oil radiator (hydraulics)
16	108-6982	Hydrostatic pressure regulator
17	108-6981	Hydrostatic pressure regulator
18	389-1119	Controller (fluid stick) hydraulics
19	239-3345	Hydrostatic pressure regulator
20	171-3052	Hydraulic motor
21	9Т-8346	Plunger pump
22	188-6140	Control valve
23	153-4846	Hydrostatic pressure regulator
24	1R-0716	Oil filter
25	1R-0749	Fine fuel filter
26	326-1642	Coarse fuel filter + separator
27	385-0249	Engine oil dipstick
28	337-5270	Transmission filter (element)
29	347-7407	Guide Gearbox filter
30	332-8833	Hydraulic filter
31	126-1818 (465-6506)	Hydraulic filter
32	1R-0777	Hydraulic filter
34	7С-3039	Engine heat exchanger
35	4W-9822	Gearbox heat exchanger
36	371-5096	Radiator tank, lower
37	113-9539	Radiator section (short)
38	109-3622	Radiator section (long)
39	6I-2431	Radiator section seal (lower)
40	6I-2435	Radiator gasket (upper)
41	106-4572	Radiator water hose (jumper)
42	197-8820 (439-8544) (Agree with the customer)	Generator (Caterpillar-3116)
43	338-3454 (Agree with the customer)	Starter
44	143-1265	Radiator protective mesh (GRID AS-SAND BLAST)
45	183-3107	Belt tensioner
46	7W-3798 (Agree with the customer)	Camshaft (Cramshaft)
47	118-2018	Fan belt (V-toothed set of 3 pcs)
48	147-9672	Cooling system fan (reversible)
49	352-0203	Water pump (Water pump)
50	294-3342	Radiator cap
51	178-9575 (Agree with the customer)	Turbocharger
52	391-2150	Fuel line (Hose AS)
53	393-5524	Fuel line (Hose AS)
54	9N-5613	Fuel line (Hose AS)
55	4P-0902	Fuel line (Hose AS)
56	254-3435	Fuel line (Hose AS)
57	299-0179	Alternator belt
58	7N-0718	Ignition switch with keys
59	440-0257	Oil pressure sensor
60	384-1336	Controller (Gripstick)
61	377-2925	Air conditioner compressor
62	2S-9506	Air conditioner compressor belt
63	375-7917	Accelerator and brake pedal unit
64	379-6657	Door glass
65	383-6864	Windshield
66	390-3154	Rear window

 

 

What is an excavator pilot pump:

A low-pressure oil pump that provides a control system, including handles, foot pedals, and some control valves attached to travel motors and rotary motors.

The importance of pilot pump on excavator:

The hydraulicgearpump pilot pump pushes the main control valve block through the pilot PPC valve to flow the high hydraulic oil from the main pump to the predetermined cylinder or motor. If the pilot pump fails, the main control valve will not work, which will affect the efficiency of the entire hydraulic system. Therefore, the importance of the pilot pump cannot be underestimated.

 

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