Jacobsen LF 3800, Parts And Maintenance Manual

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3 ADJUSTMENTS
GB-12
3.7 MOW SPEED _____________________________________________________________
Cutting quality is better at speeds well below the transport
speed of the tractor. An initial mow speed of five to six mph
is set at the factory and should be satisfactory for most
cutting conditions. Local turf conditions however may
respond better to a different speed.
To set mow speed, loosen jam nut (A) and adjust stop screw
up to reduce speed, down to increase speed. Tighten nut to
hold adjustment in place.
Figure 3G
3.8 BELT ____________________________________________________________________
Inspect and adjust new belt after first ten hours of operation.
Adjust every 100 hours thereafter.
Adjust alternator pulley so belt deflects 1/4” to 5/16” (6 -8
mm) with a 20 lb. push at midpoint between pulleys. See
engine manual.
If tension is incorrect, loosen alternator mounting bolts (B)
and adjust alternator until proper belt tension is achieved.
Figure 3H
3.9 BRAKES _________________________________________________________________
Adjust brakes after replacing or servicing brake assembly, or
if pedal travel becomes excessive.
1. Loosen adjusting nuts (C).
2. Adjust cable so brake pedal has 1 in. (25 mm) free
travel
(E) before brake pads engage brake disk.
Tighten nut (C) to lock adjustment in place.
3. If brakes wear beyond point where they can be
adjusted by the cable, move brake bracket into second
set of holes provided (D) and complete adjustment
procedure.
4. Start tractor and check operation of brakes. Park
tractor on an incline (approx. 16.7° slope) and engage
parking brake. Brake must prevent tractor from rolling.
Figure 3I
A
LF002
1/4” TO 5/16”
(6 TO 8 MM)
B
LF012
LF013
E
D
C