ENGINE
3D-7
SECTION 3D. ENGINE
GENERAL
An engine operator’s manual, prepared by the engine
manufacturer is supplied with the machine. Study the
manual carefully to become familiar with the mainte-
nance, operation, and adjustment of the equipment.
Following the manufacturer’s instructions will assure
maximum service life and operation of the engine.
1. Adjustments and maintenance should always be
performed by a qualified technician. If proper
adjustment cannot be made, contact an autho-
rized Jacobsen dealer.
2. Replace, do not adjust, worn or damaged compo-
nents.
ENGINE BELT
Inspect and adjust the new engine belt after the first 50
hours of operation. Check and adjust the belt annually
thereafter.
1. Adjust the alternator drive belt to deflect 0.25 to
0.31256 in (6 to 8 mm) with a force of 20 lbs. Push
at the midpoint between pulleys (Figure 3D-1).
See the engine manufacturer's manual.
Figure 3D-1. Alternator Mounting
2. Adjust the belt tension by loosening the alternator
mounting bolts and pulling the alternator against
the belt until the proper tension is achieved
(Figure 3D-2).
Figure 3D-2. Engine Drive Belt
WARNING
To prevent serious injury, lower the decks to the
ground, disengage all drives, engage the brake, stop
the engine, and remove the key from the ignition
switch before making any adjustments or performing
maintenance.
Ensure the tractor is parked on a solid level surface.
Never work on a tractor that is supported only by a
jack. Always use jack stands.
Use chocks in front of and behind the wheels of the
axle remaining on the ground when lifting only one
axle.
3D
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