Thermo Scientific 49i, Instruction Manual, Page: 156 / 314

Preventive Maintenance
Pump Rebuilding
5-6 Model 49
i
Instruction Manual Thermo Fisher Scientific
2. Remove capillary, check for particulate deposits, clear any blockage with
a wire less than 0.015-inch OD, or replace the capillary by following the
above steps in reverse.
Figure 5-1. Capillary Location
Pump Rebuilding
Use the following procedure to rebuild the pump ( Figure 5-2 ). To replace
the pump, see “Pump Replacement” in the “Servicing” chapter.
Equipment Required:
Flatblade screwdriver
Pump rebuild kit (flapper valve and diaphragm)
1. Turn instrument OFF, unplug the power cord, and remove the cover.
2. Loosen the fittings and remove both lines going to the pump.
Capillary
Capillary
Equipment Damage Some internal components can be damaged by small
amounts of static electricity. A properly grounded antistatic wrist strap must
be worn while handling any internal component.