GORMAN-RUPP PA4A60-4024T-ESP, Installation, Operation And Maintenance Manual

Page: 99 / 110

PA SERIES OM-06301
MAINTENANCE & REPAIR PAGE E - 28
Apply a light coating of oil to the lip of the outboard
oil seal (6) and press it into the bearing housing
bore with the lip positioned as shown in Figure 5.
Press the oil seal into the housing until the face is
just flush with the machined surface on the hous­
ing.
Apply a light coating of oil to the lip of the oil seal
(6B) and press it into the drive flange (18) with the
lip positioned as shown in Figure 5. The face of the
oil seal should be
just flush with the outer face of
the bearing cap.
Install the drive flange gasket (19) and secure the
drive flange to the bearing housing with the hard­
ware (16 and 17).
Be careful not to damage the lip
of the oil seal on the shaft keyway.
Lubricate the bearings as indicated in LUBRICA­
TION at the end of this section.
Securing Bearing Housing and Drive Assembly
to Engine
(Figure 12)
Install the shaft key (23, Figure 9) in the shaft key­
way. Position the flexible portion of the coupling as­
sembly (3) on the shaft as shown in Figure 12.
NOTE
The flexible portion of the coupling must be proper­
ly positioned on the shaft. The heads of the caps­
crews in the center of the coupling
must be posi­
tioned away from the pump .
Align the keyway in the bushing (2) with the shaft
key, and slide it onto the shaft until the face of the
bushing is just flush with the end of the shaft. Ro­
tate the flexible portion of the coupling until the
tapped holes for the two setscrews align with those
in the bushing, and install the setscrews.
Make certain that the flexible portion of the
coupling is mounted as shown in Figure
12.
This is critical. If the coupling is not
properly positioned on the shaft, the
coupling parts may not fully engage, or a
pre‐load condition can cause premature
bearing failure.
The end of the shaft must be recessed
0.25 inch (6,3 mm) from the face of the
bushing.
This will allow the two portions of
the coupling to fully engage when the en­
gine bracket is secured to the engine bell­
housing without pre‐loading the bearings.
With the flexible portion of the coupling and the
bushing properly positioned on the shaft, tighten
the two setscrews in an alternating sequence until
the bushing and coupling are fully secured. Torque
the setscrews to 23.3 ft. lbs. (280 in. lbs. or 3,2 m.
kg.).
If the complete coupling assembly is being re­
placed, apply `Loctite Retaining Compound No.
242' or equivalent to the threads of the hardware (4
and 5), and secure the outer ring of the coupling to
the engine flywheel by torquing the hardware to 45
ft. lbs. (540 in. lbs. or 6,2 m. kg.).
Using a suitable lifting device, position the as­
sembled drive and rotating assembly so the flex­
ible portion of the coupling seats inside the outer
ring attached to the engine flywheel.
NOTE
To ease installation, lightly lubricate the rubber por­
tion of the coupling with a non‐petroleum based
lubricant such as vegetable oil or glycerin, or a sili­
con‐based lubricant such as “WD40” or equivalent.
Do not use petroleum‐based lubricants, or any oth­
er substance which may soften or otherwise dam­
age the rubber.
Install the intermediate guards (20, Figure 9) and
secure the bearing housing to the engine bellhous­
ing with the previously removed hardware (6 and
7).
Seal Reassembly and Installation
(Figures 9, 14, 15 and 16)
Most cleaning solvents are toxic and
flammable. Use them only in a well ven­
tilated area free from excessive heat,