Alamo BUSH HOG RMB 1660, Operator'S Manual

Page: 173 / 230

OPERATION
RMB 1660 01/22 Operation Section 4-51
© 2022 Alamo Group Inc.
OPERA
T
ION
Problem Possible Cause Remedy
Spindle Leaking At
Motor Due to Motor Seal Failure
(hydraulic Oil leak) See section on motor seal failure and repair as
needed
Motor Loose or bolts
missing Bolts should be checked every 8 hrs. Loss of
torque will result in seal failure and leakage
Gasket torn due to
movement of motor on
spindle flange See above
Excessive Backpressure in
Spindle Remove the Spindle vent plug and check for
clogs or contamination.
Spindle Leaking
Around Bottom Seal Seal Damaged due to
Debris Replace as required. Check for damaged or
missing seal guard
Bearings Loose Disassemble the Spindle and inspect the
bearings for damage. Re-assemble and
properly pre-load the bearings based on the
technical service manual.
Seal blown out due to
excessive back pressure Remove the Spindle vent plug and check for
clogs or contamination.
Spindle Leaking At
Relief Vent Relief fitting installed in the
fill hole (wrong hole) 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.
Spindle Overfilled Overfilling will result in the lubricating oil being
expelled from the vent.
Spindle Overheating Low Grease Level in the
spindle Fill lubricant until it can be seen in the top most
(vent plug) hole.
Excessive Bearing Pre-
load Disassemble the spindle and inspect the
bearings for wear. Re-assemble following the
bearing pre-load specifications in the Technical
Service Manual.
Blade bar bolts are too
long 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.
Spindle Shaft Loose or
Falls Out Bearing Pre-load adjusting
nut and/or lock nut failure 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
Bearing cups or cones not
installed properly Disassemble and check for wear. Follow
reassembly procedures indicated in the
Technical Service Manual
Severe upper bearing
failure. 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.