Welch 8890, Руководство пользователя

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Section7: REPAIR SERVICE
7.1 Repair Kits
Minor repairs to the pump can usually be performed in the field. Minor repair kits contain those parts which can
be easily replaced, are most likely to wear, and involve only minor repair. Parts constituting the internal
mechanism of the pump which would require complete pump disassembly for replacement are not included.
7.2 Major Factory Repair
With proper care, this pump will give many years of service. The basic working parts of vacuum pumps are
machined to close tolerances and require assembly on fixtures, with special tools, by mechanics who are highly
skilled at this work. Should major repairs involving the pump mechanism become necessary, we strongly
recommend that the pump be returned to the factory for repair.
Welch Rietschle Thomas maintains complete repair facilities in the United States. These facilities are well
equipped and staffed with experts to insure prompt reconditioning of all returned pumps. Broken, worn, scored or
corroded parts are replaced with new parts, and the pump is thoroughly evaluated and tested to determine that it
meets the performance requirements.
7.3 Minor Repair Kit For Model 8890 Vacuum Pumps
A minor repair kit, Cat. No. 8890K-02, is available for the Model 8890 Vacuum Pump. This kit contains a group
of parts that can be replaced in the field. Table 7-1 lists the contents of the minor repair kit. Refer to Figure 4-1
Exploded View Diagram. this should be used as a guide for disassembly and assembly.
Table 7.1 Minor Repair Kit for Model 8890 Vacuum Pump, Parts List
Part No. Description Quantity Where Used
61-2158A O-Ring, #110 1 Oil Drain Plug
61-1123A Intake Valve 1 Pump Module
61-1128A Backer Valve 2 Pump Module
61-1122A Exhaust Valve 1 Older Models
61-1178A Silencer 1 Older Models
61-1119B Oil Case Gasket 1 Mounting Plate
61-2130A Bumper Rubber 4 Base
41-2694 Coupling Spider 1 Motor/Pump
41-2962 Lip Seal 1 Wear Plate
61-2130A O-Ring, #115 1 Oil Fill & Intake Older Models
61-2162A O-Ring, #015 (iso. valve models) 1 Isolation Valve
61-2155A O-Ring, #020 (iso. valve models) 1 Isolation Valve
67-0729 Instruction Manual 1 —
61-1174A Installation Tool 1 Lip Seal
61-1175A Insertion Tool 1 Lip Seal
61-2231 Tetraseal, #127 (New S/N 1025 & Up) 1 Sight Glass Window
61-1179A O-ring, #034 1 Gas Ballast
61-9479A Drip Pad 1 Pump