Flow HYPERJET 94i-S - Page 54

5. Separate the actuator body from the high-pressure
valve.
6. Remove the adapter from the high-pressure body.
7. Remove and discard the high-pressure seat.
8. Remove and discard the high-pressure seal assembly
(poppet, seal, back-up ring, o-ring, and bearing).
9. Remove the oil port adapter and use a
3
16
-in. dowel
(or similar) to push the piston insert and piston out
of the actuator body through the oil port.
10. Remove and discard the o-ring and back-up ring
from the piston.
11. Clean the remaining parts in an ultrasonic cleaner.
Check the parts for nicks and burrs; replace as
necessary.
12. Lubricate a new o-ring, back-up ring, and the inner
surface of the actuator body with Parker Super O
Ring Lube or equivalent.
13. Install the new o-ring and back-up ring on the actua
-
tor piston with the back-up ring towards the insert
end of the piston. Install the insert into the piston,
then install the piston assembly into the actuator
body until seated.
Note: Avoid damaging the o-ring on the threads and
inside corners of the actuator body.
14. Replace the oil port adapter in the actuator body.
15. Lubricate the poppet, seal, o-ring, and bearing with
White Food Grade O Ring Lube.
16. Install the o-ring onto the high-pressure seal and
then install the seal onto the poppet with the o-ring
towards the pointed end of the poppet.
17. Install the new bearing and back-up ring onto the
poppet with the bearing on the pointed end side
and the back-up ring on the opposite side of the
seal. Then insert the assembly into the high-pressure
body through the actuator port (largest diameter
thread).
18. Push the back-up ring down until seated against the
flat bottom of the port.
19. Install the high-pressure seat in the high-pressure
body, applying Blue Lubricant to mating surfaces.
Note: The seat is symmetrical and either face may
be inserted first.
20. Apply blue lubricant to the threads, then install the
adapter into the valve body. Torque to 125 ft-lb
(170 N-m).
21. Thread the actuator body into the high-pressure
valve assembly and tighten.
22. Reinstall the bleed-down valve on the pump bracket
and insert the gland nut in the high-pressure inlet
port in the side of the valve. Torque the gland nut to
35 ft-lb (47 N-m).
23. Install the gland nut that connects the water drain
tubing to the bleed-down valve, and reinstall the
high-pressure water pressure sensor.
24. Reattach the hydraulic hose to the oil port of the
bleed-down valve.
Return the intensifier pump to operation. Correct any
water or oil leaks.
54 | M-390 © Flow International Corporation
HYPERJET™ 94i-S AND 94i-D PUMPS