Neutral Adjustment; Forward / Reverse Speed - Jacobsen 67958 Handbuch

4 ADJUSTMENTS

4.10 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 4K - M). Distance between the 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.

4.11 FORWARD / REVERSE SPEED ______________________________________________

Forward and reverse speeds are adjusted at the traction
pedal. Set forward speed before adjusting reverse.
To adjust forward speed:
1. Make sure drive pump has been set to neutral and
engine throttle is adjusted correctly.
2. Start engine and check forward travel speed with
engine at full throttle and mower in two wheel drive
(2WD). Forward transport speed should measure 12
mph (19 kph)
3. Stop engine. To adjust speed, disconnect eye bolt (K)
from pedal and loosen jam nut. Turn eye bolt in to
reduce speed, out to increase speed. Tighten jam nut
to hold adjustment in place and connect eye bolt.
4. With traction pedal in neutral, check position of neutral
(J) . Adjust switch up or down so pointer (M) on
switch
traction pedal bracket is centered over it. When
adjusted correctly lamp 5 on controller will light when
ignition switch is turned to on.
5. Start engine and check speed. Repeat procedure until
12 mph (19 kph) forward transport speed is attained.
To adjust reverse speed:
1. Set forward speed.
18
6. Connect traction linkage. When connecting linkage at
traction pedal, make sure pointer on traction pedal
bracket is centered over neutral switch (M -Figure 4K).
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 5.2.
2. Start engine and check reverse travel speed with
engine at full throttle. Reverse speed should measure
4-5 mph (6-8 kph)
3. Stop engine. To adjust speed, loosen nut on reverse
travel stop bolt (L). Slide bolt forward in slotted hole to
increase speed, back to reduce speed. Tighten nut to
hold adjustment in place.
4. Start engine and check speed. Repeat procedure until
4-5 mph (6-8 kph) reverse speed is attained.
K
F
H
G
Figure 4J
J
L
Figure 4K
LF014
LF011
M