Diagnose Sluggish Operation Under Load; Diagnose Transmission Low Or No Power - Husqvarna Z400 Series Service Manual

TROUBLESHOOTING
Diagnose Sluggish Operation
Under Load
Diagnostic Checks
Is the bypass valve on
the transmission in the
down position?
Is transmission linkage
damaged or broken?
Is transmission oil to
the correct level?
Is parking brake
binding on the rotor?
Is ground drive belt
adjusted correctly?
Is ground drive belt in
good condition?
Are drive mandrel
bearings in good
condition?
Is engine operating
correctly?
Is transmission
operating correctly?
Results
YES: Go to next check.
NO: Adjust bypass
valve. See
"Purging
Procedure" on
page 3-7.
YES: Replace
transmission
linkage as
necessary.
NO: Go to next check.
YES: Go to next check.
NO: Add transmission
oil as necessary.
YES: Adjust parking
brake. See "Adjust
Brakes" on
page 4-10.
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: Replace drive
mandrels as
necessary.
YES: Go to next check.
NO: Adjust engine as
necessary. See
"Engine Runs
Erratically" on
page 5-20.
YES: Checks complete.
NO: See an authorized
Husqvarna dealer
for assistance.
Diagnose Transmission Low or
No Power
Diagnostic Checks
Is the bypass valve on
the transmission in the
down position?
Is transmission linkage
damaged or broken?
Is transmission oil to
the correct level?
Is parking brake
binding on the rotor?
Is ground drive belt
adjusted correctly?
Is ground drive belt in
good condition?
Are drive mandrel
bearings in good
condition?
Is transmission
operating correctly?
7-4
Results
YES: Go to next check.
NO: Adjust bypass
valve. See
"Purging
Procedure" on
page 3-7.
YES: Replace
transmission
linkage as
necessary.
NO: Go to next check.
YES: Go to next check.
NO: Add transmission
oil as necessary.
YES: Adjust parking
brake. See "Adjust
Brakes" on
page 4-10.
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: Replace drive
mandrels as
necessary.
YES: Checks complete.
NO: See an authorized
Husqvarna dealer
for assistance.
Z400 Series