Trailer Jockey Operators Handbook
39
• Change oil in transmission
• Change air dryer cartridge
• Change brake linings
• Clean aftertreatment diesel particulate filter.
4-4 S
ERVICE
P
ROCEDURES
4-4.1 F
LUID
L
EVELS
The engine, power steering, and transmission oil levels may be
checked by raising the hood.
• The engine oil level must be checked with the engine
stopped.
• The transmission oil level must be checked with the
engine idling and the oil at normal operating temperature.
• Engine, power steering and transmission oils may be
added without tilting the cab.
• The main hydraulic system oil level may be visually
checked by sight gauge at the right side of the Trailer
Jockey. The oil level must be maintained above the half
way mark when the fifth wheel is lowered.
The main hydraulic system is pressurized. Remove the pres-
sure cap slowly to relieve the pressure before adding oil. Be
sure the area around the cap is clean before removing it.
4-4.2 E
NGINE
O
IL
AND
F
ILTER
C
HANGES
Engine oil should be changed at:
• Six (6) months
• 550 hours
• 12,000 miles (19,000 kilometers)
whichever comes first. Cummins recommends using a high-
quality SAE 15W-40 heavy duty engine oil. Use of synthetic
oils (those made with API group 3 or group 4 base stocks) is
permitted. The same engine oil change intervals must be
applied to synthetic oil.
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