Mow Speed; Belt; Brakes - Jacobsen 67971 – LF 3400 Ersatzteile

3 ADJUSTMENTS
3.7

MOW SPEED _____________________________________________________________

Cutting quality is better at speeds well below the transport
speed of the mower. 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.
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.
3.9

BRAKES _________________________________________________________________

Adjust brakes after replacing or servicing brake assembly, or
if pedal travel becomes excessive.
1. When installing new brake pads, burnish pads by
driving mower at mowing speed while applying a slight
pressure on brake pedal for about 5 seconds. Release
and repeat five times before making the final
adjustment.
2. Fully loosen adjusting nut (E).
3. Disconnect brake
Illustration 7.1) at caliper.
4. By hand, pull cable behind adjusting nut (C) away from
pedal until brake pads just contact brake disk. Thread
adjusting nut (C) up until it contacts the mounting plate.
Tighten nut (E) to lock adjustment in place. Torque nut
(E) to 20 ft lb (27 Nm). Do not overtorque or turn cable.
5. Connect brake return spring. Repeat for second cable.
6. 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.
14
return spring (See Item
A
7. Start mower and check operation of brakes. Park
mower on an incline (approx. 16.7° slope) and engage
parking brake. Brake must prevent mower from rolling.
Adjust nut (C) as required.
14,
B
1/4" TO 5/16"
(6 TO 8 MM)
D
D
E
LF002
Figure 3G
LF012
Figure 3H
C
Figure 3I