Diagnose Machine Will Not Drive Straight; Diagnose Machine Will Not Reach Maximum Speed - Husqvarna Z400 Series Service Manual

TROUBLESHOOTING
Diagnose Machine Will Not Drive
Straight
Diagnostic Checks
Are tires inflated to
14-16 psi (96-110 kPa)
(0.96-1.1 bar)?
Is the bypass valve on
the transmission in the
down position?
Is transmission oil to
the correct level?
Is ground drive belt
adjusted properly?
Is the ground drive belt
and pulleys in good
condition?
Are the transmission
control linkages bent
or damaged?
Are tracking
adjustment screws set
correctly?
Is the parking brake
binding on the rotor?
Is transmission system
operating correctly?
Results
YES: Go to next check.
NO: Adjust tire
pressure.
YES: Go to next check.
NO: Adjust bypass
valve. See
"Purging
Procedure" on
page 3-7.
YES: Go to next check.
NO: Add transmission
oil as necessary.
YES: Go to next check.
NO: Adjust ground belt.
See "Adjust
Ground Drive Belt
Tension" on
page 4-10.
YES: Go to next check.
NO: Replace ground
drive belt and
pulleys. See
"Remove and
Install Ground
Drive Belt" on
page 5-12.
YES: Replace
transmission
control linkage as
necessary.
NO: Go to next check.
YES: Go to next check.
NO: Adjust tracking
screws. See
"Adjusting
Tracking" on
page 4-6.
YES: Adjust parking
brake. See "Adjust
Brakes" on
page 4-10.
NO: Go to next check.
YES: Checks complete.
NO: See an authorized
Husqvarna dealer
for assistance.
Diagnose Machine Will Not
Reach Maximum Speed
Diagnostic Checks
Are tires inflated to
14-16 psi (96-110 kPa)
(0.96-1.1 bar)?
Is the bypass valve on
the transmission in the
down position?
Are the transmission
control linkages bent
or damaged?
Is ground drive belt
adjusted properly?
Is the ground drive belt
in good condition?
Are tracking
adjustment screws
preventing machine
from reaching full
speed?
Is the parking brake
binding on the rotor?
Is engine reaching max
RPM?
7-2
Results
YES: Go to next check.
NO: Adjust tire
pressure.
YES: Go to next check.
NO: Adjust bypass
valve. See
"Purging
Procedure" on
page 3-7.
YES: Replace
transmission
control linkage as
necessary.
NO: Go to next check.
YES: Go to next check.
NO: Adjust ground belt.
See "Adjust
Ground Drive Belt
Tension" on
page 4-10.
YES: Go to next check.
NO: Replace ground
drive belt. See
"Remove and
Install Ground
Drive Belt" on
page 5-12.
YES: Go to next check.
NO: Adjust tracking
screws. See
"Adjusting
Tracking" on
page 4-6.
YES: Adjust parking
brake. See "Adjust
Brakes" on
page 4-10.
NO: Go to next check.
YES: Checks complete.
NO: Adjust throttle.
See "Check and
Adjust Throttle
Cable" on
page 4-4.
NO: See an authorized
Husqvarna dealer
for assistance.
Z400 Series