C. Basic Engine Adjustments
Adjustment procedures applicable to the diesel engine are included in the John Deere Diesel Hand-
book which accompanies this Hobart manual. Specific information for this particular engine is listed in
Figure 3.
D. Engine Accessories Adjustment
(1) Generator and fan belt adjustment Refer to 2-1; Para. 8 for fan belt adjustment instructions.
NOTE: Replace fan belts as a matched set.
Manufacturer
John Deere
Model
6466T
Type
Turbocharged, In-line, 6-cylinder,
4-cycle Diesel
Displacement
466 cu. in. (7.64 liters)
Compression ratio
15.8 : 1
Firing order
1-5-3-6-2-4
Horsepower at 2000 RPM
250
Governed speed
1714 RPM +/-4.5%
Idle Speed
850 +/-25 RPM
Electrical System
12 volt
Oil capacity
18 quarts (17 liters)
Coolant capacity (approx.)
12.44 gallons (47.00 liters)
Fuel
Diesel oil conforming to ASTM
Specification D.975-66T,
Nos. 1-D and 2-D
Lube oil
MIL-L-2014C or MIL-L-2014D
Engine Specifications
Figure 3
E. Electric Governor System Adjustment
Two electric governor system main components, namely the magnetic pickup and controller, have
critical adjustments which can affect engine performance and therefore generator output. The adjust-
ment of the actuator linkage can also affect engine performance.
When the complete system is to be checked and/or adjusted, a definite sequence of procedures
should be followed:
First - Check or adjust actuator linkage
Second - Check or adjust magnetic pick-up
Third - Check or adjust electric control box
(1) Actuator linkage adjustment
The proper adjustment of the mechanical linkage between the electric actuator and engine speed
control lever is important to the satisfactory operation of the complete system.
Exact adjustment instructions regarding effective length of rod assembly
(6, Fig. 4),
or regarding
the proper hole in actuator lever in which to attach ball joint
(4)
cannot be determined because of
slight variations in brackets, mountings, and engine performance characteristics. However, defi-
nite rules must be followed in making the adjustments:
March 16/90
2-3
Page 9
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