John Deere GT2554 - Manual (Page 28)

Service Engine - 24
SERVICE ENGINE
Service Engine
Avoid Fumes
Engine Warranty Maintenance Statement
Maintenance, repair, or replacement of emission control
devices and systems on this engine, which are being done
at customers expense, may be performed by any nonroad
engine repair establishment or individual. Warranty repairs
must be performed by an authorized John Deere dealer.
Adjusting Carburetor
NOTE: Carburetor is calibrated by engine manufacturer
and should not require any adjustments.
If engine is operated at altitudes above 1829 m (6,000
ft.), some carburetors may require a special high
altitude main jet. See John Deere dealer.
Possible engine surging will occur at high rpm with no
load (with transmission in N (neutral) and mower blade
engagement lever disengaged). This is a normal
condition due to emission control system.
If engine is hard to start or runs rough, check
Troubleshooting section of this manual.
After performing checks in troubleshooting section and
engine is still not performing correctly, contact John Deere
dealer.
Engine Oil
Use oil viscosity based on expected air temperature range
during period between oil changes.
Preferred John Deere oils:
• TORQ-GARD®
• PLUS-4®
Other oils may be used if above John Deere oils are not
available, provided they meet following specification:
• API Service Classification SG or higher
Checking Engine Oil Level
1. Park machine safely. (See Parking Safely in the Safety
section.)
2. Allow engine to cool. Lift hood.
3. Clean area around dipstick to prevent debris from falling
into crankcase.
c
CAUTION: Avoid injury! Sickness or possible
death from engine exhaust fumes.
Do not run an engine in an enclosed area
without:
• An exhaust pipe extension connected to
exhaust pipe of engine directing exhaust fumes
out of area.
• Doors and windows open allowing fresh
outside air into area and getting exhaust fumes
out.
IMPORTANT: Avoid damage! Do not run engine if oil
level is below add mark.