TeeJet TASC-6500 - Manual (Page 20)

999-1511 TASC 6200/6500
20 M-T 96162
5.4 HYDRAULIC FLOW CONTROL VALVES
The most critical maintenance item for the hydraulic valves is the hydraulic oil filter. Keep the filters clean
and always use a good grade of replacement oil. Also do a daily check of the oil cooler heat exchanger
to be sure it has a good flow of air. Cool oil last longer and performs better.
Some valves have a removable cover over the motor actuator. Be sure the cover is secure and that any
gaskets are in place.
5.5 LIQUID FLOW CONTROL VALVES
Inspect the liquid flow control valve before each day's operation. Look for leaks around the attachment
fittings and valve stems. If the valve has a removable cover over the motor actuator, be sure the cover is
secure and that any gaskets are in place.
At the end of the day, care should be taken to thoroughly flush the valve with clean water.
BE CAREFUL THAT WATER OR SEDIMENT IS NOT TRAPPED IN THE FLOW CONTROL VALVE,
PARTICULARLY IN COLD WEATHER, AS DAMAGE TO THE MECHANISM MAY OCCUR.
5.6 ROTATIONAL SENSORS
Check periodically that rotational sensors are secured tightly to the shafts being measured. Also check
the torsion strap on slotted disc sensors to be sure it is not damaged or loose. Be sure the mounting
brackets for proximity sensors have not been bent or damaged. Replace any damaged parts immediately
and calibrate the associated channel.
5.7 MID-TECH PERISTALTIC LIQUID INJECTION PUMPS
(not applicable to 6200)
5.7.1 DAILY
Clean and lubricate the flexible tubing in the injection pumps prior to each day's operation. Use only the
tube lube from your supplier.
At the end of the day, disconnect the pump from the MID-TECH TANK (or turn OFF the valve at the outlet
of the chemical tank), connect the pump to fresh water and flush according to the chemical
manufacturers's directions. Then, remove the tube from the pump housing to prevent it from developing a
hard spot under the roller. This is particularly important in cold weather, or when the pump will be idle the
next day.
5.7.2 WEEKLY
CAUTION: BE SURE THE CHEMICAL LINES ARE DIS-
CONNECTED OR THE TANK VALVES ARE OFF, SO THAT
LIQUIDS CAN NOT DRAIN OR SIPHON INTO THE MAIN
BOOM SUPPLY LINE WHEN THE TUBES ARE REMOVED
FROM THE INJECTION PUMP.