Today we talk about the repair method of the parts on the forklift and the means to eliminate some faults.
Forklift gear pump parts repair methods are:
1. Forklift gears: The outer gears of the gears are worn and glued so that their radial clearances become larger. The lighter ones have no noticeable effect on use. In severe cases, the gears should protect the safety of other parts of the forklift.
2. The wear on both sides of the gear, if it is not serious, it will only play a line. Grinding will be used to grind the burr marks; when the wear is serious, it can be polished off. However, as long as one gear end wears, the other gear must also be ground at the same time to ensure that the difference between the two gears is about 0.005mm. Grinding should also pay attention to the accuracy of the end face and hole, end face and end face. After grinding, apply oil stone to sharpen sharp burrs but not chamfer.
3, oil pump gears are all working in one direction, so the tooth surfaces are single-sided wear. Gears with worn tooth surfaces can be removed from the burrs with Whetstone, and the meshing orientation of the gears can be reversed to restore the working performance of the oil pump.
4. Forklift gear bearing frame: When the end face wears or picks up the line, four bearings can be placed on the surface grinding machine. When the non-gear contact surface is used as the reference, the end surface will be ground once.
5, the inner hole is generally less wear, if serious wear, grinding or grinding the aperture to repair the size, optional needle roller.
6. When worn, scratched and grooved with sleeves or axially floating sleeves, the damaged surface can be polished. The method is to put no 400-600 on the smooth surface of the paste, plus wash oil or wax gently on the side plate surface rotation for polishing.
7, forklift gear pump body: pump body wear generally occurs in the suction chamber, some oil pumps can be used on the structure of the transposition method to repair, that is, the pump body around its axis 180 °, so that the suction chamber into the pressure chamber to restore its work ability.
8, can not be used to transpose the repair of the oil pump body can be repaired with copper insert method.
9. When the gear is ground due to wear on the end face, the rear end of the pump body must be ground to an appropriate thickness in order to maintain the axial clearance.
Forklift truck unloading fault troubleshooting method:
When the cpcd5aiiz type forklift has a gear in use, there is a strong impact of abnormal sound. Because the car is equipped with a hydraulic shift fixed shaft variable speed reducer or differential loose.
The drive shaft of the main reducer rotates its input shaft by hand and finds a free rotation gap of nearly 30 degrees, so it is determined that the gear clearance of the main reducer is too large. Remove the main reducer and measure the clearance as 0.65mm (standard value 0.30-0.50mm). Adjust the position of the bevel gear so that the gear clearance with the bevel driving gear is 0.35mm. After refitting the test machine, there is still a shock phenomenon and an abnormal sound is caused when the gear is engaged. The degree is only slightly reduced compared with the original, but the failure remains.
To do this, remove the drive shaft again and leave the transmission at no load. Start the engine and repeat the gear-hanging, blocking, and lifting gear tests. It is found that the abnormal sound generated by the gear is still present and the transmission has obvious vibration. Check the transmission mounting bolts, no looseness. Judging from this phenomenon, the fault should be inside the transmission. The decommissioning, cleaning and inspection of the transmission were dismantled, and the taper roller bearings of the main and driven shafts of the reverse gear and the forward gear clutch were found to be loose. By adjusting the bearing to an appropriate gap by increasing or decreasing the shims, and reassembling the test machine, the phenomenon of shock and abnormal noise of the shock absorber is weakened, but the failure phenomenon still exists.
After such a detailed inspection has failed to find the root cause of the failure, is there any defect in the design or manufacture of this type of forklift? Therefore, the forklifts produced by the same model of the plant were found to carry out road tests for gearing, pushing, and lifting gears. As a result, it was found that there were slight impacts on the gears, but the severity was different. Therefore, the search for the cause of the fault should be on the hydraulic control part of the transmission. Refer to the transmission control principle diagram and the parts map of the transmission. Know that the piston return of the clutch is achieved by the spring preload. Therefore, at the moment when the gear is engaged, the main clutch may have a situation in which the pressure controls the flow of the oil, so that the preload of the spring is quickly overcome so that the drive piece and the follower pad are engaged too fast and generate a gear impact. In order to verify this idea, it is necessary to make certain modifications to its hydraulic control line. An adjustable flow valve is connected in series between the reversing valve and each clutch piston to control the flow rate so that it can achieve the purpose of stable engagement.
The above is some tips on how to repair some parts of a forklift truck and quickly troubleshoot.
Standard:
ANSI B16.5,
EN1092-1 DIN2565 DIN 2566
Size: 1/2''~60''
Class Rating: 150~2500
Facing: RF(raised face);FF(flat face);RTJ(ring type joint);RJ(ring joint face)
TG(tongue and groove face);MFM(male and female face)
Manufacturing process: forge,
Material:
Carbon steel:
ASTM A105;
ASTM A266 GR.1,GR.2,GR.3,GR.4
Stainless steel:
304/SUS304/UNS S30400/1.4301
304L/UNS S30403/1.4306;
304H/UNS S30409/1.4948;
309S/UNS S30908/1.4833
309H/UNS S30909;
310S/UNS S31008/1.4845;
310H/UNS S31009;
316/UNS S31600/1.4401;
316Ti/UNS S31635/1.4571;
316H/UNS S31609/1.4436;
316L/UNS S31603/1.4404;
316LN/UNS S31653;
317/UNS S31700;
317L/UNS S31703/1.4438;
321/UNS S32100/1.4541;
321H/UNS S32109;
347/UNS S34700/1.4550;
347H/UNS S34709/1.4912;
348/UNS S34800;
Alloy steel:
ASTM A694 F42/F46/F48/F50/F52/F56/F60/F65/F70;
ASTM A182 F5a/F5/F9/F11/F12/F22/F91;
ASTM A350 LF1/LF2/LF3;
Duplex steel:
ASTM A182 F51/S31803/1.4462;
ASTM A182 F53/S2507/S32750/1.4401;
ASTM A182 F55/S32760/1.4501/Zeron 100;
2205/F60/S32205;
ASTM A182 F44/S31254/254SMO/1.4547;
17-4PH/S17400/1.4542/SUS630/AISI630;
F904L/NO8904/1.4539;
725LN/310MoLN/S31050/1.4466
253MA/S30815/1.4835
Nickel alloy steel:
Alloy 200/Nickel 200/NO2200/2.4066/ASTM B366 WPN;
Alloy 201/Nickel 201/NO2201/2.4068/ASTM B366 WPNL;
Alloy 400/Monel 400/NO4400/NS111/2.4360/ASTM B366 WPNC;
Alloy K-500/Monel K-500/NO5500/2.475;
Alloy 600/Inconel 600/NO6600/NS333/2.4816;
Alloy 601/Inconel 601/NO6001/2.4851;
Alloy 625/Inconel 625/NO6625/NS336/2.4856;
Alloy 718/Inconel 718/NO7718/GH169/GH4169/2.4668;
Alloy 800/Incoloy 800/NO8800/1.4876;
Alloy 800H/Incoloy 800H/NO8810/1.4958;
Alloy 800HT/Incoloy 800HT/NO8811/1.4959;
Alloy 825/Incoloy 825/NO8825/2.4858/NS142;
Alloy 925/Incoloy 925/NO9925;
Hastelloy C/Alloy C/NO6003/2.4869/NS333;
Alloy C-276/Hastelloy C-276/N10276/2.4819;
Alloy C-4/Hastelloy C-4/NO6455/NS335/2.4610;
Alloy C-22/Hastelloy C-22/NO6022/2.4602;
Alloy C-2000/Hastelloy C-2000/NO6200/2.4675;
Alloy B/Hastelloy B/NS321/N10001;
Alloy B-2/Hastelloy B-2/N10665/NS322/2.4617;
Alloy B-3/Hastelloy B-3/N10675/2.4600;
Alloy X/Hastelloy X/NO6002/2.4665;
Alloy G-30/Hastelloy G-30/NO6030/2.4603;
Alloy X-750/Inconel X-750/NO7750/GH145/2.4669;
Alloy 20/Carpenter 20Cb3/NO8020/NS312/2.4660;
Alloy 31/NO8031/1.4562;
Alloy 901/NO9901/1.4898;
Incoloy 25-6Mo/NO8926/1.4529/Incoloy 926/Alloy 926;
Inconel 783/UNS R30783;
NAS 254NM/NO8367;
Monel 30C
Nimonic 80A/Nickel Alloy 80a/UNS N07080/NA20/2.4631/2.4952
Nimonic 263/NO7263
Nimonic 90/UNS NO7090;
Incoloy 907/GH907;
Nitronic 60/Alloy 218/UNS S21800
Threaded flange is a flange that connects threads to pipes. When it is designed, it can be treated by a loose flange. The advantage is that there is no need for welding, and the additional torque on the cylinder or pipe when the flange is deformed is very small. The disadvantage is that the thickness of the flange is large and the cost is high. It is suitable for the connection of high pressure pipe.
The threaded flange is made from the inner hole of the flange into pipe thread and connected with the pipe with thread, which is a non welded flange. Compared with the flat welding flange or butt welding flange, the threaded flange has the characteristics of convenient installation and maintenance, and can be used on some pipelines which are not allowed to be welded on the spot. Alloy steel flanges are of sufficient strength, but they are not easy to weld or have poor weldability. Threaded flanges can also be selected. However, if the temperature changes rapidly or the temperature is higher than 260 C below -45 C, it is recommended not to use threaded flange to avoid leakage.
Threaded Flange,Din Thread Flange,Astm Threaded Flange,En1092-1 Thread Flange
HeBei GuangHao Pipe Fittings Co .,LTD (Cangzhou Sailing Steel Pipe Co., Ltd) , https://www.guanghaofitting.com