Twin Disc TA-90-8501, Operator'S Manual

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Twin Disc, Incorporated
Power Shift Transmission System Operator’s Manual #1020510
Preventative Maintenance
Adding Oil
The oil fill plug is located on the front face of the transmission on the left side as
viewed from the rear.
Refer to Figure 5 in Operation. Add or remove oil as
needed to set proper level. Note that an optional oil fill plug is located on the
left side of the planetary section below the valves.
Do not operate the transmission with oil levels above or below the
recommended settings. Either condition can result in overheating or
loss of power and damage to the equipment. When following this oil
check procedure be sure the fracturing rig parking brakes are on. The
fracturing rig wheels should also be blocked or the fracturing rig parked
up against an immovable object.
Oil/Filter Change Interval
Change the transmission oil after every 1200 hours of operation. Change the
oil filter after each 300 hours of operation or sooner if the filter pressure indicator
shows
TRAN OIL FILTER in the display.
Note: The TRAN OIL FILTER message is triggered by a switch
that senses pressure drop across the filter. As the filter
fills with contamination the pressure drop increases. A
filter may show an
TRAN OIL FILTER message under
cold oil conditions at high engine speeds even though the
filter is still usable. With oil temperature between 0° and
35° C at low idle engine speed and with oil at 80° to 100°
C at any engine speed the
TRAN OIL FILTER message
should not appear. If it does come on under these
conditions, the oil filter
must be changed as soon as
possible.
When changing the oil in the transmission system drain the transmission sump
and the engine flywheel housing. Change the oil filter.
When installing new units or newly rebuilt units it may be necessary to replace
the oil filter after a few hours of operation. Monitor the filter pressure indicator
for the
TRAN OIL FILTER message.