Neutral Adjustment; Neutral Sensing Switch - Jacobsen HR 9016 Turbo Parts & Maintenance Manual

3 ADJUSTMENTS
3.7

NEUTRAL ADJUSTMENT ___________________________________________________

Important: The neutral adjustment on the drive pump is
preset at the factory on all new mowers and replacement
pumps. Further adjustment is required only if the pump
has been disassembled for service or neutral lever
bracket (F) has become loose.
To adjust neutral on pump:
1. Disconnect traction pedal linkage from pump.
Remove switch mounting bracket from pump.
2. Place mower securely on jack stands so All wheels
are raised off ground.
3. Check that tow valve (H) is completely closed.
4. Loosen screws (G) holding pump return arm bracket
just enough so it can be moved.
5. Engage parking brake and set PTO switch to
neutral.
The neutral sensing switch must be closed in order to
start the mower. At this point the switch may not yet
be assembled to pump. To close switch so engine
can be started, place it face down on metal frame.
6. Start engine and observe wheels. Rotate bracket (F)
in slotted holes until wheels do not turn. Turn OFF
engine and tighten bracket in place.
3.8

NEUTRAL SENSING SWITCH________________________________________________

The neutral sensing switch is part of the operator backup
system. It is designed to prevent the mower from starting
unless the traction pedal is in Neutral. If this switch fails
or is out of adjustment, the mower will not start.
1. Make sure drive pump and traction pedal linkage are
adjusted to neutral. Sections 3.6 and 3.11.
2. Position switch so pointer (A) on activator plate is
centered over sensing area on switch.
3. Adjust switch so gap between sensing surface on
switch and end of pointer is between 1/16 - 1/8 in.
(1.5 - 3 mm). Secure switch in this position.
Important: Always check operation of Interlock System
after replacing or adjusting switch. (See Safety and
Operation Manual)
en-14
7. Connect traction pedal linkage, Section 3.11, and
install and adjust switches, Sections 3.8 and 3.9.
Important: Always check operation of Interlock System
after replacing or adjusting switch. (See Safety and
Operation Manual)
8. Start engine and check operation of traction pedal.
Wheels must not turn when pedal returns to Neutral.
K
1/16" - 1/8"
(1.5 - 3 mm)
F
H
G
Figure 3H
A
Figure 3I
HR027
HR010