Tuthill KINNEY KC Series, Руководство оператора, Страница: 30 / 48

24
Manual 1807 Rev B p/n 001807 0000
07
DISASSEMBLY
Although these instructions describe complete
disassembly, disassemble the pump only to the
extent necessary to repair it.
These instructions make reference to the open
head and closed head ends of the cylinder. Note
that the open head is the end through which the
shaft extends.
1. Drain the oil as described in Changing the
Oil on page 14 . Remove the belt guard (if
supplied) and belts.
2. Disconnect the piping to the pump suction.
3. Remove the pump pulley and drive key.
4. Remove the pump assembly from the base
and position it on a workbench.
5. If pump is equipped with an oil mist eliminator,
unscrew the oil mist eliminator.
6. Remove the discharge valve assembly as
follows:
a. Remove the cylinder cover and gasket.
b. Remove both guide rods, both discharge
valve springs, the discharge valve block,
and the discharge valve. Note how the
components were removed so that they
can later be replaced correctly.
7. Remove the shaft seal as follows:
a. Remove the shaft seal retaining ring from
the shaft.
b. Remove the rotating portion of the shaft
seal from the shaft. This may require a
heavy pull, especially if the unit has heat
bonded to the shaft. In extreme cases,
it may be necessary to remove the open
head or shaft seal housing to remove the
seal.
c. Remove the stationary portion of the shaft
seal (seal seat) from the pump.
8. Remove the shaft seal housing by removing
the securing cap screws and break the seal
between the shaft seal housing and the head.
Remove the shaft seal housing O-ring.
9. Remove the gas ballast valve and connecting
fittings.
10. Remove the open head as follows:
a. Remove the open head cap screws and
break the seal between the head and the
cylinder.
b. If necessary, remove the open head
bearing by pressing it out of the head.
11. Remove the open head piston and slide pin.
Mark the piston and the slide pin so that they
can be reassembled in the same position.
Although parts are interchangeable between
the high vacuum stage and the backing stage,
it is advisable to replace piston and slide pin in
the same stage once the parts are worn in.
12. Remove the cap screws securing the closed
head cap to the closed head.
13. Remove the cap and sealing O-ring.