Toro ProCore 648 Operator's Manual page 45

PROBLEM
Abnormal vibration.
Aerator does not drive.
Coring head does not drive.
Head bounces while aerating.
Turf tufting/tearing on entrance
and exit.
Turf tufting/tearing on entrance.
Quad (or mini) tine hole spacing.
Hole tufting with side eject tines.
POSSIBLE CAUSES
1. Engine mounting bolts are
loose.
2. Jackshaft or coring head
bearings worn.
3. Jackshaft or coring head
components loose or worn
1. The parking brake is on.
2. Hydraulic fluid level low.
3. The tow valve is open.
4. Hydraulic system is damaged.
1. Worn clutch.
2. Worn switch or relay.
3. Worn or loose belts.
4. Hydraulic fluid level low.
5. The tow valve is open.
6. Hydraulic system is damaged.
1. Ground is too hard.
2. Relief setting/Restriction orifice.
1. Mis–adjusted switch bundle.
2. Clutch wear/slippage
1. Mis–adjusted switch bundle.
2. Head lowers too slowly.
1. Holes not evenly spaced.
1. Ejection window catching on
exit.
45
CORRECTIVE ACTION
1. Tighten engine mounting bolts.
2. Replace bearings.
3. Tighten or replace components.
1. Release the parking brake.
2. Add hydraulic fluid.
3. Close the tow valve.
4. Contact your Toro Distributor.
1. Replace clutch
2. Replace switch or relay.
3. Adjust or replace belts.
4. Add hydraulic fluid.
5. Close the tow valve
6. Contact your Toro Distributor.
1. Refer to the operating tips on
page 26.
2. Dynamic response of lift
system. Adjust the system
pressures. Refer to the Service
Manual.
1. Adjust the #3 switch. Refer to
the operating tips on page 26.
2. Contact your Toro Distributor
for testing.
1. Adjust the switch. Refer to the
Service Manual.
2. Check the function of the SVQ
solenoid.
1. Check the spacing. Refer to the
operating tips on page 26.
1. Rotate the tine 45–90_ so it
ejects out the side.
2. Try a hollow tine.