GENERAL MAINTENANCE
TRANSMISSION - ALLISON
PERIODIC INSPECTIONS
IMPORTANCE OF CORRECT OIL LEVEL
OIL CHECK PROCEDURE
The ALLISON AUTOMATIC TRANSMISSION requires minimal maintenance.
Careful attention to oil level, selector linkage, and throttle modulator is
most important.
For easier inspection the transmission should be kept clean. Make
periodic checks for loose bolts and leaking oil lines. Check the condition
of the control linkages regularly. Check the engine cooling system
occasionally for evidence of transmission oil which would indicate a faulty
oil cooler. Report any abnormal conditions to the company
maintenance personnel.
The transmission oil cools, lubricates transmission parts and transmits
power. It is important that the correct oil level be maintained at all times.
If the oil level is too low, the converter and clutches will not receive an
adequate supply of oil. This can result in poor performance or
transmission failure. If the oil level is too high, the oil will aerate, causing
the transmission to overheat. Check the oil level at intervals specified in
your Optare Tempo Service Schedules. Check for abnormal oil level, a
milky appearance indicates coolant in the oil.
Always clean around the end of the fill tube before removing the
dipstick. Dirt or foreign matter must not be permitted to enter the
oil system, it can cause valves to stick, creates undue wear of
transmission parts, or clogged passages. Check the oil level by
one of the following three procedures (overleaf) and report any
abnormal oil level to the company maintenance personnel.
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