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Displacement Pump Repair
Before you start:
1.
A
packing repair kit, part no. 206-927,
is
available.
This kit includes
two
glands and eight packings for
the motor as well as O-rings, packings and washers
for the displacement pump. For
the best results,
use
all the parts in the kit.
2. Clean all parts as you disassemble them, using
a
compatible solvent, and inspect
for wear or
damage. Replace parts as necessary.
Intake
Valve (See Fig 4)
1. Follow the Pressure Relief Procedure Warning
on
page 7.
2.
Unscrew the intake valve housing
(15),
Models
205-626,222465,
and
222-095:
Inspect the
ball (4) and the seat in the housing
(15)
for nicks or
scratches. Check the O-ring (30) for damage.
Models
205-627 and 205-628:
Remove the ball stop
pin (17). Inspectthe ball (4) and seat (19a) for nicks
or
scratches.
A//
Models:
Replace the ball and/or seat If it
is
dam-
aged, as damaged parts do
not
seal properly and
may cause poor pump performance.
3. If no further sewice is needed, reassemble the Intake
valve. For Models
205-627
and
205-628.
be sure the
ball stop pin
(17)
is reinstalled Inthe proper holes.
See
Check Valve Adjustment on page 9.
Piston
4. Unscrew the riser tube (9) from the pump base.
Clean the tube and inspect
it
for wear by holding
it
up
to a
light
at a slight angle. If you see wavy lines
or scratches where the piston travels, replace the
tube as it will not seal well with the new piston
packings and the pump will perform poorly.
5.
Loosen the locknut
(2) and unscrew the piston (8)
from {he connecting rod
(16).
6.
Disassemble and clean all parts.
7. Reassemble the piston, using all the new parts from
the kit and any other
new parts needed. Oil the
leather packings
(10') first. Then assemble
the
parts on
the
piston
seat
(7) in this order: backup
washer
(13),
spreader
(111,
leather packing
(lo*),
spacer
(14)
with
a
new o-rina (5) installed in it.
another leather packing
(10.L
spreader
(11)
and
backup washer
(13").
NOTE:
To replace the throat packings, follow the
procedure given in your separate air motor
manual,
306-982,
supplied, before continu-
ing with this procedure.
8. Apply sealant to the threads of the seat
(7)
and
screw onto the piston body (8). Screw the piston
onto the connecting rod
(16)
and adjust the ball
on page 9. Tighten the locknut (2).
travel as instructed in Check Valve Adjustment
if
necessary.
9. Check the O-ring
(6)
in the pump base and replace
it
205-627
&
16
3/16 PISTON
BALLTRAVEL
205-627
&
16
3/16 PISTON
BALLTRAVEL
/
- 1 5
1 9 b l
MODELS
205-626,
222-065,
4
&
222-095
15
30
Fig
4
10.
Lubricate the piston packings and the inner wall at
the top of the riser tube (9). Wrap the packings with
a guide collar made of
1/64
in. maximum thickness
shim stock or metal sheeting. Using
a
turning mo-
tion, work the first leather packing into the riser
tube. Remove the guide collar and push the riser
tube up and screw it into the base. Torque the tube
to
100-150
ft-lb
(135204
N d .
Reassembly
1.
Be sure the check valves are properly adjusted. See
page 9.
2. Reinstall the intake valve.
3 .
Reconnect the pump's ground wire to a true earth
ground.
8
306-726
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