819.6247
11
Service
Service Kits
Service Kits may be ordered separately.
To repair the air valve, order Part No. 819.6249. Parts
included in the Air Valve Service Kit are marked with an
asterisk in the
Parts Drawing
on page 16, for example (3*).
For fluid section repair section parts, see the
Service Kit
Listing
on page 14. Parts included in the Fluid Section Ser-
vice Kit are marked with a dagger in the
Parts Drawing
on
page 16, for example (4
).
Servicing the Air Valve
Service the air valve as follows. See Fig. 4.
1.
Relieve the fluid pressure
, and disconnect air line from
the pump.
Warning
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the
Pressure
Relief Procedure
on page 7.
2.
Remove the four screws (14) that hold the valve
cover (7) on the center housing (1).
3.
Remove the valve block (4) and valve carriage (2), and
replace the u-cups (3). Replace the valve carriage and
valve block. When you replace the valve carriage, posi-
tion it all the way to one side or the other.
NOTE:
The valve block shown in Fig. 4 is for pumps
with an air-operated air motor. If your pump has
a solenoid-operated air motor, this step does
not pertain. Items 2, 3, 4, 16, and 17 are not
required.
4.
Clean any parts that are dirty.
5.
To replace the value cover (7), spread cover apart
enough not to damage the square ring packings (6) and
slide cover (7) into the center section.
6.
Replace screws (14), and torque the screws to 40 in-lb
(4.5 N.m). See
Torque Sequence
on page 17.
7.
Reconnect the pump.
Fig. 4
14
7
06177C
14
2
4
Lips of u-cups (3) must face toward each other
(toward center of valve carriage (2)).
1
1
3
3
1
1
17
16
6
6
Summary of Contents for AIR VA 8 810.6012
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