Leybold Vacuum Products, TRIVAC A, Dual Stage, Rotary Vane ...

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E-7 _ Thoroughly clean the coupling housing (11 L making certain that no dirt has accumulated in the crevices of the housing (see Figure 5-15). E-S. Carefully inspect all parts for excessive wear. Give particular attention to the following: a. The ends of each rotor (48/54) may be wearing against the inside surface of the front (44) and rear (60) end plates or against the center bearing (52). Inspect these surfaces for gouges and wear (see Figure 5-S). If you observe scoring or wear, proceed as follows: ( 1 ) Replace the plate that is scored. (2) Check the rotors for burrs. If burrs are found, sand or file them smooth. (3) Using calipers or micrometers, measure the length of each rotor (Dimension A of Figure 5-9). If the length dimension of either rotor is less than the dimension listed for your pump model in Table 5-1 (on the following page), replace that rotor. b. The shaft rides in bronze bushings in the front (44) and rear (60) end plates and in the center bearing (52) plate (see Figures 5-6, 5-8, and 5-9). Inspect the inside surface of these three bronze bushings for gouging or wear. If you observe deep gouging, replace the gouged shaft or the plate containing the gouged bushing_ If you observe minor scratches or wear, proceed as follows: (1) Using calipers or micrometers, measure the inside diameter (I D) of the bronze bushing_ If the lOis greater than the dimension listed for your pump in Table 5-1, replace the end plate or center bearing plate containing the worn bushing. (2) Using calipers, measure the outside diameter (00) of the shaft at each area of wear. If the shaft 00 at any point of wear is less than the dimension listed for your pump model in Table 5-1, replace the shaft. c. Three rectangular vanes (49/53) fit into slots in each rotor (48/54). (See Figures 5-7 and 5-8.) Using calipers or micrometers, measure the length and thickness dimension of each vane. If either dimension is greater than the maximum or less than the minimum dimension listed for your pump model in Table 5-1, replace that vane. If a vane dimension is greater than the maximum, it is the result of swelling due to chemical attack. E-9. Using a paint brush, cover all the pump parts with a light coat of the proper pump fluid. (see Section 5-A-1). 5-F REASSEMBLING THE PUMP New seals, gaskets, and O-rings and a new valve disk (67) and elastic element (36) should be used when reassembling the pump. Use a new valve plate (50) only if wear is visible on the old valve plate. For extreme-corrosive service pumps, new vanes (49/53) and a new oil filter (35) are also used. Wet the O-rings, gaskets, and seals with a film of the proper pump fluid before installing. Make certain that all 0- rings, gaskets, seals, and all pump parts are clean before reassembly. F-1 CAUTION: IF THE PUMP ROTATES IN THE WRONG DIRECTION FOR TOO LONG, PUMP FLUID IS EJECTED OUT OF THE INTAKE TUBE (1) AND THE VALVE DISK (67) OR THE MOTOR MAY BE DAMAGED. Ensure that the direction of rotation of the motor is correct as follows: a. Steps a(1) and a(2) are for the D30A pump models with single-phase motors and for all D2A, D4A, DBA, and D16A pump models: See plate on motor for motor specifications. TRIVAC "A" Manual, Edition L 29
E 5-1. ROTOR, BEARING, SHAFT, AND VANE CRITICAL DIMENSIONS D2A D4A D8A D16A D30A D60A/D90A Minimum Rotor Sa 34.970 34.970 44.960 44.960 74.921 74.921 Length (mm) HV a 34.970 69.970 44.960 89.960 74.921 149.890 Maximum Fb 12.027 12.027 15.027 15.027 22.033 22.033 Bushing Diameters Cb 12.027 12.027 15.043 15.043 22.070 22.070 (mm) Rb 12.027 12.027 15.027 15.027 22.033 22.033 Minimum Shaft Diameter at Points of Wear (mm) 11.992 11.992 14.992 14.992 21.991 21.991 Second Stage max. 34.991 34.991 44.991 44.991 74.990 74.990 Vane L C Dimensions (mm) TCmin. High Vacuum Stage Vane Dimensions (mm) TC Maximum Inside Diameter d of Pump Cylinders (mm) 54.830 54.830 78.630 78.630 118.535 118.535 Step F·l (a) (Cont'd.) a - b - c - d - See Figure 5·7. S second stage pump cylinder; HV = high vacuum stage pump cylinder. F = front bushing; C = center bushing; R = rear bushing. L :; length; T = thickness; max. = maximum; min. = mrnimum. a(1) If the motor is single phase !ill! it was supplied through Leybold, it has been factory wired for correct rotation; therefore, it isn't necessary to check motor rotation unless you altered the wiring or replaced the motor. If the wiring was altered or the motor replaced, refer to Step a(2) below. a(2) If the motor Is 3-phase, or if it wasn't supplied through Leybold, or if its wiring was altered, check the direction of rotation as follows: A 'k!: (a) Connect the power supply momentarily to jog the motor, and then immediately switch it oft "I 1:1, " 30 TRIVAC "A II Manual, Edition L
Page 1 and 2: Vacuum Process Measuring and LEY BO
Page 3 and 4: Death or serious injury can result
Page 5 and 6: LIST OF TABLES Table Title Page t "
Page 7 and 8: 011:' DRAIN PORTS WITH PLUG SCREW (
Page 9 and 10: ,-- \ \ \ EXHAUST HOLES 51 \ I lTA
Page 11 and 12: 2-5 ANTI-SUCK BACK MECHANISM When t
Page 13 and 14: install an exhaust line with a smal
Page 15 and 16: TABLE 4-1. TECHNICAL DATA \f/ Pump
Page 17 and 18: • SECTION 5 DISASSEMBLY, CLEANING
Page 19 and 20: AKE TUBE (1) 8/9 lTA-2.2 Figure 5-1
Page 21 and 22: 60 52 D2AMODULE lTA-4.15 Figure 5-3
Page 23 and 24: Figure 5-5. Removing the Cylindrica
Page 25 and 26: ,.,Acc HOLE nlAT . f'ACESAWAVFI'lOM
Page 27 and 28: NOTE; A" parts shown are from a D2A
Page 29 and 30: VALVE STOP (1)1) VALVE PLATE (501 S
Page 31: 5-E-1 Special Requirements for extr
Page 35 and 36: Step F-1 b (2) (Cont'd.) (b) For D3
Page 37 and 38: Step F-l (b) (2) (Cont'd.) (m) CAUT
Page 39 and 40: F-6 CAUTION: FAILURE TO ENSURE THAT
Page 41 and 42: Step F-6 e (Cont'd.) Figure 5-20. P
Page 43 and 44: lTA-6.13A Figure 5-22. Using a Shaf
Page 45 and 46: NOTE: This view is looking toward t
Page 47 and 48: "'" "'" Symptoms Trouble Area Proba
Page 49 and 50: ~ Symptoms Trouble Area TABLE 6-1.
Page 51 and 52: ~ 00 TABLE 6-1. TROUBLESHOOTING CHA
Page 53 and 54: ~-- ~ TABLE 6-1. TROUBLESHOOT1NG CH
Page 55 and 56: ~ TABLE 6-1. TROUBLESHOOTING CHART
Page 57 and 58: SECTION 7 PARTS LIST 7-1 contains i
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