Technical data
Removing the Pump
(Refer
to Fig
20)
1.
Flush the pump,
if
possible,
and
relieve pressure
again. Stop the pump with the piston rod
(2231
in
its
loweq position.
To
lower
it
manually,
carefully
rotate the blades
of
the 'Tan
with
a screwdriver.
2.
Remove the clamps holding
the
drain tube
(126)
to
the displacement-pump.
3.
Unscrew
the
suction tube
(42)
from the pump. Hold
the purhp from loosening.
the wrench on the pump intake valve
(222)
to keep
4.
Unscrew
the
hose
(47)
from
the
nipple
(46)
on the
pump outlet and remove
the
hose.
.
'
5.
Use
a
screwdriver to push the retaining spring
i35)
aside and push out the pin
(20).
6.
Loosen the locknut
(38)
and unscrew the pump
from the bearing housing
(27).
Disassembling the Pump (Refer to
Figures21
and221
1.
Unscrew the
intake
valve
(222)
from the cylinder
(2161..
Remove the gasket
(2061,
ball guide
(215).
stop pin
(207)
and ball
(204)
from the valve. Clean
and
inspect the parts for wear or damage, replacing
parts as needed.
Always
usea new gasket (includ-
ed
in
Repair
Kit
820-041
1.
2.
Unscrew and remove
the
packing nut
(221)
and
3.
.
Use
a
plastic mallet to tap the piston rod
down,
then pull the rod out through the
boftorn
of
the
cylinder.
4.
Remove the throat packings
(209.
218)
and glands
(211,212).
5.
Clamp the flats
of
the piston
rod
in
a
vise.
Use
a
7/8
in. wrench to loosen the retaining nut
(214).
Then
from the rod.
use the wrench to unscrew the piston valve
(224)
6.
Remove the backup washer
(219).
wiper
(205),
packings
(208, 217)
and glands
(213,
2201.
plug
(201).
Fig
P
26820-408
Fig
21
!
\I-PACKING
IN
LIPS
OF
THROAT
FACE DOWN
*2171PLASTICI
LIPS
OF
V-PAC
Fig
22