Gorman-Rupp Pumps PAH6B60-6068H IT4 1529202 and up - Manual (Page 46)

OM-06602 PAH SERIES
MAINTENANCE & REPAIR PAGE E - 23
Make certain that the flexible portion of the
coupling is mounted as shown in Figure 9.
This is critical. If the coupling is not prop­
erly 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 extend 0.44
inch (11,2 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 67 ft. lbs. (800 in. lbs. or 0,57 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 50
ft. lbs. (6,9 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.
Secure the drive flange (20, Figure 6) to the engine
bellhousing with the previously removed hardware
(6, 7 and 9).
Seal Reassembly and Installation
(Figures 6 and 10)
Most cleaning solvents are toxic and
flammable. Use them only in a well ven­
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain­
ers.
Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent. Inspect the stationary
seat bore in the seal plate for dirt, nicks and burrs,
and remove any that exist. The stationary seat bore
must be completely clean before installing the
seal.
A new seal assembly should be installed
any time the old seal is removed from the
pump. Wear patterns on the finished faces
cannot be realigned during reassembly.
Reusing an old seal could result in prema­
ture failure.
To ease installation of the seal, lubricate the shaft
sleeve O‐ring and the stationary element O‐ring
with a very small amount of light lubricating oil.
See Figure 10 for seal part identification.