Jet R750 Manual

Lubrication
Use transformer oil, Shell Tellus Turbo
T or equal. The ball bearings are of the
closed design and permanently greased.
Inspecting the Hydraulic Parts
The pump housing (volute) and the
impeller should be visually inspected
every time an oil and stator inspection is
made. Change parts if excessive wear
has occurred or if performance of pump
has been impaired.
Note: If impeller is worn and in need of
replacing, always install new oil lip seals
and, on models with a shaft sleeve a new
shaft sleeve at the same time.
Inspecting Motor Cable
Carefully inspect the outer shield and the
wire endings. If the outer shield has been
damaged, water can enter the pump
through the core. The cable should
never be stretched by force and the
pump never lifted by the motor cable.
This could severely damage the cable
and the cable glands in the cable holder.
Perform continuity test on each lead.
4
Detailed Overhaul
A complete overhaul should be made
if water has been detected in the stator
housing, or if the pump has been in
daily use for a year. The intervals can
be increased if the pump has been
permanently installed as a sump pump
with automatic controls. Dismantle the
pump completely, replace damaged
or worn parts with new, original parts.
Clean all surfaces and check for cracks
or damage. If water is present in stator
housing and/or in oil chamber, replace
mechanical seals, O-rings, oil seal and
bearings.
SUBMERSIBLE PUMP
OPERATOR'S MANUAL
CONTENTS
Start-up Description .........................2
Electrical Connection .......................2
Handling ...........................................2
Rotation of Impeller ..........................2
Placing Pump ...................................2
Liquid Temperature ..........................2
Submersion Depth ...........................2
Cold Weather ...................................2
Troubleshooting ...............................3
- 1. Not starting ...........................3
- 2. Low capacity or low head ....3
- 3. Water in stator housing ........3
- 4. Water in oil housing .............3
Overhaul ..........................................3
- General .....................................3
- Mechanical seal inspection......3
- Lubrication ...............................4
- Inspecting the hydraulic parts 4
- Inspecting the motor cable ......4
Detailed Overhaul ............................4
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