SP4012 SERVICING HYDRAULICS
59
REPLACING HYDRAULIC PUMP
• Engine must be shut off.
• Disconnect hydraulic lines from pump and
cap them.
• Remove bolts holding mounting plate to
machine (located at 6 & 12 o’clock position)
• Remove plate/pump assembly by pulling
assembly straight out. Drive coupling will
separate and make removal possible. Make
sure to set aside fiber spacer for later re-
installation.
• Remove drive coupling half from pump
shaft by loosening Allen screw. It may be
necessary to pry apart coupling by inserting
screwdriver into coupling split and relieving
pressure on pump shaft. Set aside key-way
for later re-installation.
• Remove pump from backing plate by
removing mounting bolts.
• To install new pump, reverse this process.
Making sure to replace fiber spacer in
coupling.
• Recheck oil supply in reservoir.
REPLACING HARDENED BUSHINGS
• Hardened bushings have been incorporated
into the machine to protect the frame from
wear and damage.
• Should a bushing need replacing, disconnect
the rod end from the frame and swing
cylinder out of the way.
• Position the new bushing directly above the
old bushing and gently tap new bushing
down into position thus removing the old
bushing.
• Swing cylinder back into position. Use new
pin assemblies to re-install rod end to frame.
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