Fluid And Filter Change Intervals - Allison Transmission HT Series Operator's Manual

FLUID AND FILTER CHANGE INTERVALS

Fluid and filter change frequencies are determined as follows.
• Table 3 is a general guide. The fluid must be changed whenever there is
evidence of dirt or high temperature indicated by discoloration or strong odor.
More frequent changes may be required when operations are subject to high
levels of contamination or overheating.
• Fluid change intervals can be optimized by monitoring fluid oxidation
according to the tests and limits in the Fluid Contamination section of this
manual.
Transmission
Application
AT 500 Paper Filter:
and 1500 Series 25,000 miles
(On-Highway) (40 000 km)
(Light-Duty) or 12 months*
(School Bus, Brass Filter:
Motorhome, and 50,000 miles
One-Way Rental) (80 000 km)
or 24 months*
AT 500, 25,000 miles
AT 500R, (40 000 km)
and 1500 Series or 12 months*
(On-Highway)
(Heavy-Duty)
AT 500 1000 hours
and 1500 Series max
(Off-Highway) or 12 months*
MT 600 Series 25,000 miles
(On-Highway, (40 000 km)
Non-MT 643R) or 12 months*
Table 3. Fluid and Filter Change Intervals
Fluid Change
Paper Filter in Shallow
Pan (4.0 in.) or
Deep Pan (5.3 in.):
25,000 miles (40 000 km)
or 12 months*
Brass Screen Filter in
Shallow Pan (4.0 in.) or
Deep Pan (5.3 in.):
50,000 miles (80 000 km)
with no time limit
Paper Filter in Shallow
Pan (4.0 in.) or Deep Pan
(5.3 in.): 25,000 miles
(40 000 km) or
12 months*
Brass Screen Filter in
Shallow Pan (4.0 in.)
or Deep Pan (5.3 in.):
50,000 miles (80 000 km)
with no time limit
Paper Filter in Shallow
Pan (4.0 in.), or Deep Pan
(5.3 in.): at each oil
change interval
Brass Screen Filter in
Shallow Pan (4.0 in.) or
Deep Pan (5.3 in.): at each
oil change interval*
Paper Filter:
25,000 miles (40 000 km)
or 12 months*
Stainless Steel Screen:
At overhaul
Internal Sump
Filter
(cont'd on next page)
32
Governor
Filter Auxiliary Filter**
At overhaul After first 5000 miles
(8000 km) and at
25,000 miles
(40 000 km) or
12 months, thereafter
At overhaul After first 5000 miles
(8000 km) and at
normal fluid change
intervals, thereafter
At overhaul After first 500 hours
and at normal oil
change intervals,
thereafter
25,000 miles After first 5000 miles
(40 000 km) (8000 km) and at
or 12 months* normal oil change
intervals, thereafter
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