Brakes; Neutral Adjustment - Jacobsen AR-522 Handbuch

4.4

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
Maintenance Manual, Item 14, Illustration 8.1) 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 over torque 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
4.5

NEUTRAL ADJUSTMENT ___________________________________________________

Neutral adjustment can only be made at the drive pump.
The neutral adjustment is preset at the factory on all new
mowers and replacement pumps. Further adjustment is not
required unless the pump has been disassembled for repair
or service.
To adjust neutral:
1. Disconnect traction pedal linkage from pump.
2. Place mower securely on jack stands so All wheels
are raised off ground.
3. Check that tow valve (H) is closed
4. Engage parking brake and set mow switch to neutral.
Make sure neutral switch at traction pedal is closed.
(Figure 4E - M). Distance between the sensing portion
of switch and metal pointer (M) must be between 1/16
and 1/8 in. (1.5 and 3 mm).
5. Loosen screws (G) holding pump lever bracket just
enough so it can be moved. Start engine and observe
wheels. Adjust bracket (F) in slotted holes until wheels
do not turn. Turn off engine and tighten bracket in
place.
6. Connect traction linkage. When connecting linkage at
traction pedal make sure pointer on traction pedal
bracket is centered over neutral switch (M -Figure 4E).
return spring (See Parts
set of holes provided (D) and complete adjustment
procedure.
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.
&
7. Start engine and check operation of traction pedal.
Wheels must not turn when pedal returns to neutral
and lamp 5 on controller should light, see Section 5.
ADJUSTMENTS
D
D
E
F
H
G
4
C
Figure 4C
LF014
Figure 4D
13