General Troubleshooting (continued)
Problem
Possible Cause
Corrective Action
The engine load is excessive.
Reduce the ground speed or raise
height-of-cut.
The oil level in the crankcase is low.
Add oil to the crankcase.
A fuel related issue has resulted in a
lean condition.
Diagnose the origin of the lean
condition.
The oil cooler (if equipped) fins are
plugged.
Clean the oil cooler fins.
The engine overheats
The cooling fins and the air passages
above the engine are plugged.
Remove the obstruction and thoroughly
clean cooling fins and the air passages.
The tracking needs adjustment.
Adjust the tracking.
One of the transaxles is weak.
Diagnose the failed side and repair as
needed.
The mower pulls to the left or right
(with levers fully forward)
The tire pressure in the drive tires is
not correct.
Adjust the tire pressure in the drive
tires.
The bypass rods are in the manual
move position.
Place the bypass rods into the drive
position.
The drive belt is worn, loose, off a
pulley, or broken.
Replace the drive belt.
The tensioner spring is broken or
missing.
Replace the spring.
The machine does not drive
The hydraulic oil level is low in the
transaxle.
Add hydraulic oil to the transaxle.
The cutting blade(s) is/are bent or
unbalanced.
Install new cutting blade(s).
The blade mounting bolt is loose.
Tighten the blade mounting bolt.
The engine mounting bolts are loose.
Tighten the engine mounting bolts.
The engine pulley, idler pulley, or blade
pulley is loose.
Tighten the appropriate pulley, check
to make sure idler springs are not over
stretched.
The engine pulley is damaged.
Replace the engine pulley.
The blade spindle is bent.
Replace the spindle.
The machine vibrates abnormally
The motor mount is loose or worn.
Check the mounting bolts.
The blade(s) are not sharp.
Sharpen the blade(s).
The cutting blade(s) are bent.
Install new cutting blade(s).
The mower deck is not level/rake is
incorrect.
Level the mower deck from side-to-side
and front-to-rear.
The underside of mower is dirty.
Clean the underside of the mower.
The tire pressure is not correct.
Adjust the tire pressure.
The machine produces an uneven
cutting height
The blade spindle is bent.
Replace the spindle.
Troubleshooting: General Troubleshooting
Page 3–4
4000 Series Z MASTER® Service Manual
3442-427 Rev A
Summary of Contents for Z Master 4000 Series
Page 2: ...Revision History Revision History Page 2 4000 Series Z MASTER Service Manual 3442 427 Rev A...
Page 6: ...Preface Page 6 4000 Series Z MASTER Service Manual 3442 427 Rev A...
Page 108: ...Electrical Service and Repairs Page 8 14 4000 Series Z MASTER Service Manual 3442 427 Rev A...
Page 111: ...Drawing Rev A Sheet 1 3442 427 Rev A Page A 3 Electrical Schematic g342795...
Page 112: ...Page A 4 3442 427 Rev A Drawing Rev Sheet Electrical PTO Engaged Schematic g346038...
Page 113: ...Drawing Rev Sheet 3442 427 Rev A Page A 5 Electrical Run Position g346039...
Page 114: ...Page A 6 3442 427 Rev A Drawing Rev Sheet Electrical Start Position g346040...
