PREVENTIVE MAINTENANCE SCHEDULE PART 8: MAINTENANCE AND SERVICE
– 166 – Y53-6032 (R05/10)
CAUTION: Exceeding the recommended oil
change intervals may be harmful to the life of
the transmission and the transmission oil
cooler.
Recommended Lubricants
Table 5 Recommended Lubricants
Type Grade (SAE) Ambient Temperature
Heavy Duty Engine
Oil MIL-L-2104B, C,
or D;
50 Above 10° F (-12° C)
API - SF, or API-CD
(Previous API des-
ignations are
acceptable)
40 Above 10° F (-12° C
30 Below 10° F (-12° C)
Mineral gear oil
with rust and oxida-
tion inhibitor API-
GL-1
90 Above 10° F (-12° C)
80W Below 10° F (-12° C)
Synthetic Lubri-
cant*
50 All
* See your Peterbilt dealer for approved brands.
Y53-6032.book Page 166 Monday, May 24, 2010 3:37 PM
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