Graham Corporation
15
Section 3 - Operating Instructions
3.1 Start-up Procedures
Read all instructions before proceeding.
1) Turn the shaft manually to ensure it rotates freely. If the pump is binding or seized,
refer to the troubleshooting chart in Section 5.
2) Fill the pump with service fluid to the shaft centerline, but do not overfill
CAUTION : DO NOT RUN THE PUMP WITHOUT SERVICE LIQUID
AND SHAFT SEAL FLUID.
3) The normal service liquid level should be no higher than the shaft centerline. The
pump may be started with a low service liquid level as long as a supply is available
immediately after start-up.
4) Open any valves in the suction and discharge lines.
5) Confirm the pump rotation with the arrow on the casing by jogging the motor.
6) Start the motor, ensure service liquid supply, and set regulating valve, when used,
for optimum pump performance. Open and adjust the shaft seal cooling liquid
valve, when used.
3.2 Pump Packing Adjustment
On Series 1 pumps, the packing adjustment nuts should be loosened before running to prevent
damage to the shaft. With the gland follower loosened, the liquid pressure in the glands will
force the packing rings against the gland follower. The pump can be run for several hours in
this manner. Tighten the gland follower to allow the cooling fluid to drip from the gland at a
rate of about 20 drops per minute from each end while the pump is running at a steady state.
Gland Follower
Gland Packing
Packing Adjustment Nuts
Pump Shaft
One end of pump shown
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