MacDon M150 SP - Manual (Page 156)

MAINTENANCE AND SERVICING - M150 ENGINE
Form 169017 / 169087 / 169095
154
Revision C
c. Loosen compressor mounting hardware (B), and
push compressor towards engine to release belt
(A) tension.
d. Remove belt (A).
e. Insert the drive end of a ½ inch drive ratchet
wrench into the belt tensioner (C).
f. Rotate tensioner counter clockwise until fan belt
(D) can be slipped off pulley (E). Release
tensioner and remove wrench.
g. Remove belt in order 1-2-3 as shown. Route fan
belt around fan, and remove belt.
h. Install new belt (D) around fan and onto pulleys in
order 3-2-1.
i. Insert the drive end of a ½ inch drive ratchet
wrench into the belt tensioner (C).
j. Rotate tensioner counter clockwise until belt (D)
can be slipped onto pulley (E). Release tensioner,
and remove wrench.
k. Check that belt is properly seated in all pulley
grooves.
l. Install A/C compressor belt (A) on pulleys.
m. Pry compressor away from engine so that a force
of 8 to 12 lbf (35 - 55 N) deflects the belt (A) 3/16
inch (5 mm) at mid-span.
n. Tighten compressor mounting hardware (B).
o. Re-check tension, and re-adjust as required.
p. Move maintenance platforms to working position,
and close engine compartment hood.
7.8.11 ENGINE SPEED
The maximum and idle engine speeds are factory
set to the specifications. See Section 4
SPECIFICATIONS.
If specified speeds cannot be maintained, see
your Windrower Dealer.
IMPORTANT
Do not remove any seals from injector
pump. Removal of seals will void the
engine warranty.
7.8.11.1 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.
B
A
1
2
3
E
C
D
A