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Repair
20 312376L
Reconnect Displacement Pump
1. If the air motor was removed, refer to the Supply
Units Repair-Parts manual for installation instruc-
tions.
2. Use caution when reconnecting displacement
pump. Place displacement pump (2) on tie rods (3).
3. Screw nuts (5) onto tie rods (3) and torque to 50-60
ft-lb (68-81 N•m).
4. Pumps with 100cc, 200cc, and 250cc displacement
pumps only: Install coupling (7), and slide coupling
cover (8) down. Install clip (9).
5. Pumps with 60cc and 500cc displacement pumps
only: Reinstall coupling nut and coupling covers on
displacement rod. Slide coupling nut up and tighten
using a torque wrench with a claw foot; see the fol-
lowing table for torque values.
6. Reconnect all hoses. Reconnect ground wire and
reed switch cable (units with remote DataTrak) if
they were disconnected. Fill wet cup (R) 1/3 full of
Graco Throat Seal Liquid or a compatible solvent.
7. Attach platen to displacement pump. Refer to the
Supply Units Repair-Parts manual for instructions
8. Turn on the air power supply. Run the pump slowly
to ensure that it is operating properly.
9. Allow 2 hours for the thread sealant to cure before
returning the pump to service.
CAUTION
Be sure to use at least two people when lifting, mov-
ing, or connecting the pump. This pump is too heavy
for one person. If you are connecting the displace-
ment pump to a motor that is still mounted (for exam-
ple, on a ram), be sure to support the displacement
pump while it is being connected, to prevent it from
falling and causing injury or property damage. Do this
by securely bracing the displacement pump, or by
having at least two people hold it while another con-
nects it.
On Premier models, ensure that the rod adapter (6)
has not loosened during maintenance. Proper
torque is necessary to prevent the rod adapter from
loosening during the pump operation.
If the rod adapter (6) has loosened during mainte-
nance, remove the adapter and apply Loctite 2760
(or equivalent) to the rod adapter and air motor pis-
ton threads, and then torque to 230-250 ft-lbs
(312-340 N•m).
FIG. 19
ti10511a
FIG. 20
Displacement
Pump Torque
60cc 75-80 ft-lbs (102-108 N•m)
500cc 230-250 ft-lbs (312-340 N•m)
FIG. 21
ti10509a
ti10718a