MacDon M100 SP Operators Manual User Manual

Page 135

MAINTENANCE/SERVICE

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133

Rev. C

57.6.8.3 A/C Compressor Belt Tension
a. Shutdown engine and open engine compartment

access hood to lowest position.

b. Loosen compressor mounting hardware (A).

c. Pry compressor away from engine so that a

force of 8 to 12 lbf (35-55 N) deflects the belt (B)
3/16 inch (5 mm) at mid-span.

d. Tighten compressor mounting hardware (A).

e. Recheck tension and re-adjust as required.

Close engine compartment hood.

57.6.8.4 A/C Compressor Belt Replacement
a. Shutdown the engine and open engine

compartment access hood to lowest level.

b. Loosen compressor mounting hardware (A) and

push compressor towards engine to release
tension.

c. Remove belt (B).

d. Install new belt (B) on pulleys.

e. Pry compressor away from engine so that a

force of 8 to 12 lbf (35-55 N) deflects the belt (B)
3/16 inch (5 mm) at mid-span.

Tighten compressor mounting hardware (A).

g. Recheck tension and re-adjust as required.

h. Re-adjust tension of a new belt after a short run-

in period (about 5 hours).

57.6.9 Engine Speed

The maximum and idle engine speeds are
determined by the ECM software, and factory
set. See Section 4 Specifications. If specified
speeds cannot be maintained, see your
Windrower dealer.

57.6.9.1 Intermediate Engine Speeds

The engine operating speed can be
programmed to enable the windrower to operate
at reduced engine rpm without significantly
affecting the ground or header speeds.

Intermediate Speed Control (ISC) is useful in
where operating loads are reduced such as in
light crop conditions which do not require the
maximum engine rpm. Reduced engine speed
lowers fuel consumption, noise levels, and
exhaust emissions in addition to reducing engine
wear.

ISC Off (Normal) – 2600 rpm.

ISC On (Intermediate) – 2400 rpm.

Programming instructions are given in Section
5.18.5 Cab Display Monitor (CDM)
Programming. The programmed engine speed
is activated when the header is engaged.

57.6.9.2 Throttle Adjustment

The engine speed is controlled with the throttle
lever that is connected to an electronic sensor
inside the console. The throttle lever in the cab
should move the throttle sensor the full range
between slow speed stop and full RPM stop
without contacting the console at either position.
If the throttle lever is contacting the console and
interferes with specified engine speeds, the
sensor position possibly requires adjustment.
See your Windrower dealer.