Allison Transmission AT 540 User Manual

6
Table 1–2. Fluid and Filter Change Intervals
A brass screen sump filter is available for all AT 500 and AT 1500 Series
transmissions for both the shallow pan and the deep pan models. To convert an
AT deep pan 5.3 inches (135 mm) with paper filter to the brass screen filter
configuration, a service conversion kit is required. Refer to Service Information
Letter (SIL) 5-TR-93 (latest revision).
1–8. FLUID AND FILTER CHANGE PROCEDURE
a. Drain
• The transmission should be at operating temperature to assist
draining.
• Remove the drain plug from the pan. Disconnect the fill tube from the pan
only if required.
• Examine the drained fluid for evidence of contamination (refer to Para-
graph 1–9).
AT
Transmission
Fluid Change Internal Sump
External Auxiliary
Filters**
On-Highway,
Light-Duty
Paper Filter:
25,000 miles
(40 000 km)
or 12 months*
Brass Filter :
50,000 miles
(80 000 km)
or 24 months*
Paper Filter: at
each fluid change
interval
Brass Filter:
50,000 miles
(80 000 km) with
no time limit
After first 5000
miles (8 000 km)
and at 25,000 miles
(40 000 km)
or 12 months,
thereafter*
On-Highway,
Heavy-Duty,
Retarder
Paper or Brass
Filter: 25,000
miles (40 000 km)
or 12 months*
Paper Filter: at
each fluid change
interval
Brass Filter:
50,000 miles
(80 000 km) with
no time limit
After first 5000
miles (8 000 km)
and at normal fluid
change intervals,
thereafter*
Off-Highway
Paper or Brass
Filter : 1000 hours
max or 12 months*
Paper or Brass
Filter: at each fluid
change interval
After first 500 hours,
and at normal fluid
change intervals
thereafter*
* Whichever occurs first.
**
When an Allison high-efficiency filter is used, the change interval is until the Change Filter light
indicates the filter is contaminated or until it has been in use for three years, whichever occurs first.
No mileage restrictions apply.

Allison Transmission AT 540 Specifications

General

Brand	Allison Transmission
Model	AT 540
Category	Microphone system
Language	English