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Problem
Spindle Leaking At
Motor
Spindle Leaking
Around Bottom Seal
Spindle Leaking At
Relief Vent
Spindle Overheating
Spindle Shaft Loose or
Falls Out
RMB 1660 01/22
© 2022 Alamo Group Inc.
OPERATION
Possible Cause
Due to Motor Seal Failure
(hydraulic Oil leak)
Motor Loose or bolts
missing
Gasket torn due to
movement of motor on
spindle flange
Excessive Backpressure in
Spindle
Seal Damaged due to
Debris
Bearings Loose
Seal blown out due to
excessive back pressure
Relief fitting installed in the
fill hole (wrong hole)
Spindle Overfilled
Low Grease Level in the
spindle
Excessive Bearing Pre-
load
Blade bar bolts are too
long
Bearing Pre-load adjusting
nut and/or lock nut failure
Bearing cups or cones not
installed properly
Severe upper bearing
failure.
Operation Section 4-51
Remedy
See section on motor seal failure and repair as
needed
Bolts should be checked every 8 hrs. Loss of
torque will result in seal failure and leakage
See above
Remove the Spindle vent plug and check for
clogs or contamination.
Replace as required. Check for damaged or
missing seal guard
Disassemble the Spindle and inspect the
bearings for damage. Re-assemble and
properly pre-load the bearings based on the
technical service manual.
Remove the Spindle vent plug and check for
clogs or contamination.
Install the vent in the top most hole or even
with the top of the top bearing race. The lower
hole is the fill hole and should have a grease
zerk or plug installed.
Overfilling will result in the lubricating oil being
expelled from the vent.
Fill lubricant until it can be seen in the top most
(vent plug) hole.
Disassemble the spindle and inspect the
bearings for wear. Re-assemble following the
bearing pre-load specifications in the Technical
Service Manual.
Installing the incorrect bolts (too long) for the
blade carrier will allow the bolts to contact the
lower bearing and will lock up the spindle.
Install the correct bolts.
Locking washers are provided to retain the pre-
load lock nut in place. Improper installation of
the washer and locking mechanism will allow
the lock nuts to back off. Re-assemble
following the recommended procedures
Disassemble and check for wear. Follow
reassembly procedures indicated in the
Technical Service Manual
Usually due to lack of lube. Replace the
bearing(s) and make sure the spindle is
properly filled. Also check for leakage and
repair as needed.
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