Friday, August 27, 2010

Checking Transmission Fluid Level from the Cockpit

With your Foretravel you are able to check the transmission fluid directly from your pilot seat. Allison Motorhome Series transmissions have an oil level sensor (OLS) that allows the operator to obtain an indication of fluid level from the shift selector. It is important that the proper fluid level in your transmission be maintained at all times because the transmission fluid cools, lubricates and transmits hydraulic power.

In later models there will be two types of push button shift selectors, the WTEC III or the Allison 4th generation (for information on earlier models shift selectors contact Foretravel Technical services).

WTEC III Controls displays fluid level Allison 4th Generation Controls displays

diagnostic information one character at fluid level diagnostic information two

a time. characters at a time.

1) Park the vehicle on a level surface, shift to N (Neutral), and apply the parking brake.

2) On the push button shift selector simultaneously press the↑ (Up) and ↓ (Down) arrow buttons.

NOTE: The fluid level check may be delayed until the following conditions are met:

• The fluid temperature is above 140°F and below 220°F.

• The transmission is in N (Neutral).

• The engine is at idle.

• The transmission output shaft has stopped.

• The vehicle has been stationary for approximately two minutes to allow the fluid to settle.

A delayed fluid level check for transmissions with WTEC III controls is indicated by a (-) DASH in the display window followed by a numerical countdown. The countdowns start at 8, indicates the time remaining in the two minutes setting period. The delayed indication for Allison 4th Generation is indicated by a flashing display under SELECT and a digit countdown from 8 to 1 above MONITOR.

• Correct Fluid Level – “o L” (represents “Fluid (Oil) Level Check Mode”) followed by “o K”. The “o K” indicates the fluid is within the correct fluid zone. (The OLS display and the transmission dipstick may not agree exactly because the OLS compensates for fluid temperature.

• Low Fluid Level – “o L” followed by “L o” (represents “Low Oil Level”) and the number of quarts the fluid is low. Example: o L L o 0 2 indicates fluid is low by 2 quarts.

• High Fluid Level – “o L” followed by “H I” (represents “High Oil Level”) and the number of quarts the fluid is high. Example: o L H I 01 indicates fluid is above the full level by 1 quart.

Any temperature below 140°F or above 220°F will result in an Invalid for Display condition. See your Allison Operator’s Manual for more info on this condition and complete details on checking transmission fluid.

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