Graco 236462, Instructions Manual

Page: 13 / 30

Repair
308352E 13
Repair
Required Tools
• Torque wrench
• Bench vise, with soft jaws
• Rubber mallet
• Hammer
• O-ring pick
• 13 mm (1/2 in.) diameter brass rod
• Set of socket wrenches
• Set of adjustable wrenches
• Pipe wrench
• Packing nut wrench (109, supplied)
• Thread lubricant
Disconnect the Displacement
Pump
1. Perform the Flush the Equipment procedure,
page 9. Stop the pump at the bottom of its stroke.
2. Follow the Pressure Relief Procedure , page 8.
3. Disconnect the air and fluid hoses.
4. Disconnect the displacement pump (106) from the
motor (101). Note the relative position of the pump
fluid outlet (ZA) to the motor air inlet (ZB).
NOTE: If the motor does not require servicing, leave it
attached to its mounting.
a. Use an adjustable wrench (or a hammer and
rod) to unscrew the coupling nut (104) from the
motor shaft (ZC). Do not lose or drop the
coupling collars (105). See F
IG
. 4, page 14.
b. Hold the tie rod flats with a wrench to keep the
rods from turning. Unscrew the nuts (103) from
the tie rods (102). Carefully remove the
displacement pump (106) from the motor (101).
NOTE: To service the displacement pump, refer to
Disassemble the Displacement Pump , page 15, and
Assemble the Displacement Pump , 18. To service the
air motor, refer to the separate motor manual, supplied.
Be sure to use at least two people when lifting,
moving, or disconnecting the pump. This pump is too
heavy for one person. If you are disconnecting the
displacement pump from a motor which is still
mounted (for example, on a ram), be sure to support
the displacement pump while it is being disconnected,
to prevent it from falling and causing injury or property
damage. Do this by securely bracing the pump, or by
having at least two people hold it while another
disconnects it.