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Repair
311327E 11
Repair
Proportioning Pumps
When the proportioning pumps are functioning properly,
it is not unusual for a trace amount of resin or isocyanate
chemical to seep past the pump packing onto the pump
shaft. Maintain proper packing adjustment to minimize
seepage. Routinely inspect the shaft and wipe away any
residue when the unit is turned off. Disassemble and
clean both proportioning pumps annually. Inspect the
pistons and cylinders for marks or scratches, which may
cause leakage or damage to packings. As a
preventative maintenance precaution, it is
recommended that the piston and cylinder packings be
replaced during the annual cleaning. (Refer to page 16
of the Parts section for reference.)
Pump Removal
1. Shut off Primary Heater Switch and Hose Heater
Switch.
2. Perform Pressure Relief Procedure, page 5.
3. Perform Flushing, page 5.
4. Turn Main Disconnect Switch OFF and disconnect
power supply.
5. Shut off both feed pumps and close both inlet supply
valves (F).
6. Shut off air supply.
7. Disconnect fitting at inlet (Q) and outlet (M).
Air motor shaft, yoke, pump rod, and connecting rod
move during operation. Moving parts can cause seri-
ous injury such as pinching or amputation. Keep hands
and fingers away from connecting rod during operation.
See manual 309577 for pump repair instructions.
TI9517a
F
Q
TI9519a
M
TI9509a