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AEC/Appllcatlon Engineering
6-5
Pump Maintenance
Disassembly
!! DANGER!!
BEFORE OPENING THE PUMP CHAMBER, MAKE
SURE:
• ANY PRESSURE IN THE CHAMBER HAS BEEN
COMPLETELY VENTED
• MOTOR CANNOT BE STARTED WHILE YOU DO
WORK ON THE PUMP
FAILURE TO FOLLOW THESE PRECAUTIONS MAY
•
RESULT IN SERIOUS INJURY OR DEATH!
•
1. Mark the head and casing before disassembly to insure proper reassembly. The idler pin,
which is offset in the pump head, must be positioned toward and equal distance between
port connections to allow proper flow of fluid through the pump.
Remove the head from the pump. Do not allow the idler to fall from the idler pin. To
prevent this from happening, tilt the top of the head back when removing. Avoid damaging
the head gasket.
If pump has a jacketed head plate, it will separate from the head when you remove it. You
must completely remove the gasket between the head and jacketed head plate. Install a new
gasket when assembling the pump.
2. Remove the idler and the bushing assembly.
3. Insert a length of hardwood or brass through the port opening between the rotor teeth to
keep the shaft from turning. Bend up the lockwasher tang with a spanner wrench. Remove
the locknut and lockwasher from the shaft.
4. Tap the shaft forward approximately 1
y,
inches and remove the pair of half round rings
under the inner spacer collar.
Note: HL pump models do not contain half round rings.
Page48
TOH TrueTemp"'
Series
Hot OJI Temperature Control Units
•
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