Walker H27i - Transmission Control Setting; Neutral-Park; Straight Ground Tracking; Blade Brake Action

62
Maintenance Instructions CHECKING/SERVICING
Transmission Control Setting
On a yearly interval or when an outofadjustment
condition is observed, check the transmission con
trol for proper function as follows:
Neutral-Park
With the mower parked on level ground, start and
run the engine, rst at idle and then normal operat
ing speeds. With the FSC in the NEUTRAL-PARK
position, there should be no movement of either
drive tire. If the tire(s) are “creeping” forward or re
verse, refer to ADJUSTMENTS for the Neutral
Function Adjustment - Step 3 in this section.
Straight Ground Tracking
Check for straight ground track by driving on a
smooth, level surface with hands o󰀨 the steering le
vers. Set the FSC at di󰀨erent speeds and observe
if the mower moves in a straight line (use a cement
joint or other line on the ground for reference). If the
machine is drifting to the right or left, refer to
ADJUSTMENTS for Straight Tracking Adjustment -
Step 5 in this section.
Blade Brake Action
WARNING
It is important to check and maintain blade
brake action for safe operation of the ma-
chine.
Check the function of the cutter blade brake by en
gaging the blade clutch (PTO), operating the engine
at full throttle, then disengaging the clutch and mea
suring how quickly the blades stop. Watch the rota
tion of the blade drive shaft as a visual indi cation that
movement has stopped. If the brake is working
properly, all rotation will stop ve (5) seconds
after disengagement of the clutch. If the brake sys
tem malfunctions—blades do not stop in ve (5) sec
onds—adjust or repair the brake before operating
the mower. Refer to ADJUSTMENTS for Clutch
Disengagement/Brake Action, Step 2 - Blade Brake
Band Adjustment on page 76.
PTO U-Joints
The PTO Ujoints should be inspected yearly for
looseness and wear. If either is noticed, the respec
tive shaft or tube should be replaced. A worn Ujoint
can cause vibration and extensive damage to the
PTO and the whole machine.
Safety Switch System
WARNING
It is important to check and maintain the
safety switch system for safe operation of
the machine.
There are four (4) safety interlock switches on the
tractor: Seat Switch, FSC NeutralPark Switch, PTO
Switch, and Parking Brake Switch.
NOTE: There is a 1/2 second time delay function on
the seat switch to avoid engine power interruption
when driving over bumps.
If any of the following conditions occur during start
ing or operating, a safety interlock switch may be
malfunctioning. Contact your Walker dealer for trou
bleshooting and/or replacement.
● With or without an operator in the seat, the
engine starts with the Forward Speed Control
(FSC) and/or the PTO engaged, or the parking
brake disengaged.
● With an operator in the seat and the parking
brake engaged, the engine starts but dies soon
after the parking brake is disengaged and the
Forward Speed Control (FSC) or PTO is en
gaged.
● Without an operator in the seat, the engine
starts and continues to run with the Forward
Speed Control (FSC) and/or PTO engaged, or
the parking brake disengaged.
● With an operator in the seat, the Forward Speed
Control (FSC) and PTO disengaged, the parking
brake engaged, and Oil Pressure Warning Horn
sounding, but the starter will not engage.