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12. LOCK COLLAR INSTALLATION – GNX(H)4 Models
a. Slide the lock collar (24A) over the shaft and against
the bearing (24), with the counterbored side towards
the bearing
b. Push the collar (24A) forcibly against the bearing (24)
by hand, while tightening the two setscrews (24B).
Install and tighten the two jam nuts (24C) against the
collar
c.
Repeat this procedure on the opposite pump end.
After installing both lock collars, verify the shaft turns
freely when rotated by hand
13. Attach a new bearing cover gasket (26) and the outboard
bearing cover (27) to the outboard head. Install and
torque the bearing cover capscrews (28) to 15 ft-lbf (20
Nm).
14. Lightly oil Adapter O-ring (135B) and install on inboard
head.
15. Ensure the key (35) is installed on the pump shaft. With
the aid of a lifting device, slide the motor and gearbox
assembly towards the pump engaging gearbox shaft
receiver with the pump shaft.
16. Install the Adapter screws (20C) into the inboard head
and torque to 23 ft-lbf.
17. RELIEF VALVE ASSEMBLY
a. Insert the valve (9) into the relief valve bore of the
casing with the fluted end inward.
b. Install the relief valve spring (8) and spring guide (7)
against the valve.
c. Attach a new relief valve O-ring (10) and the valve
cover (4) on the cylinder.
d. Screw the relief valve adjusting screw (2) with locknut
(3) into the valve cover (4) until it makes contact with
the spring guide (7).
e. After the relief valve has been adjusted, tighten the
Locknut (3) and install the relief valve cap (1) and O-
ring (88).
NOTICE:
The relief valve setting MUST be tested and adjusted
more precisely before putting the pump into service.
Refer to "Relief Valve Setting and Adjustment"
Operation without guards in place can
cause serious personal injury, major
property damage, or death.
Do not operate
without guard in
place.
18. Reinstall coupling, shaft key, and coupling guards.
19. Refer to “Pre-Start Up Check List” and “Start Up
Procedures” sections of this manual prior to restarting
pump operation.
