Graco HYDRA-SPRAY 218-058 A, Instructions-Parts List Manual

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Displacement Pump Repair (Refer to Figs 4 and
NOTES:
1.
Packing Repair Kit
No.
217-135 is available for
Pump Model Packing Repair Kit
No.
is available for Pump Model Use
all the parts in the kits, even if the old ones still look
good for best results.
2. Clean
all parts thoroughly when disassembling.
Check them carefully for damage or wear, replacing
parts
as needed.
3.
Reference numbers in the text with a star, for
the repair kit.
ample indicate that this part is included in
Intake
Valve
cylinder
(107).
Unscrew the intake valve housing from the
Remove the pin ball ball guide
O-ring retainer and O-ring Inspect the seat in
the valve housing; if
it
is chipped or worn, replace the
intake valve housing If the seat is damaged, the
ball will not seat properly and the pump
will
not stop
completely when there is no flid demand.
Piston
Loosen the throat packing nut Push the displace-
ment rod down until you can grasp the piston, the
the piston and displacement rod down through the
bottom of the cylinder
Scoring or irregular surfaces on the displacement rod
premature packing wear and leaking. Check these parts
(103)
or polished inner wall of the sleeve causes
by rubbing a finger on the surfaces or by holding the
parts up to a light
at
an angle. Replace worn parts.
NOTE:
If you replace the sleeve, be sure to install
the new one with the inside tapered end
down and to reinstall the gasket If you
can't remove the sleeve easily, contact your
nearest Graco Factory Branch or Service
Depot.
Reassembling
oil.
Coat the displacement inside of the sleeve with
Install the throat packings in the order indicated below.
against fluid pressure. Lubricate the inside
of the
the lips of the v-packings face DOWN,
ings with grease compatible with the fluid being
pumped. Always use new glands with new packings.
Model
One
at a time, install the washer a
male gland
three leather v-packings
a
throat of the cylinder
See Fig
4.
packing
and a female gland into the
Model
21
One at a time, install the washer a male gland
a UHMWPE v-packing
two
leather
v-packings a UHMWPE v-packing and
a
female gland
16')
into the throat of the cylinder
(107).
See Fig 5.
Loosely install the packing nut
n
Fig 4
307-619
PTFE