Challenger MT297, Service Manual

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79028569 A Rev. 02-1
General Precautions
GENERAL PRECAUTIONS
GENERAL PRECAUTIONS FOR
SEPARATION AND INSTALLATION
Before Operation
• Always be safety-conscious in selecting clothes to
wear and suitable tools to use.
• Before disassembly, be sure that you familiarize
yourself with the assembled condition for subsequent
reference in reassembly.
• Keep parts and tools in proper order during
operation.
• When servicing electrically charged parts, be sure to
disconnect the negative battery terminal.
• To prevent oil or water leaks, use liquid gasket as
required.
• When reassembling disassembled parts, discard
used gasket, O-rings, or oil seals and install new
ones.
• When lifting up only the front or rear part of the
tractor, be sure to wedge the grounded wheels.
• When the tractor is jacked up, be sure to support the
entire tractor with something like a stand. Lifting it up
with a jack only, is a dangerously unstable procedure.
• When replacing parts, use authorized, genuine
AGCO / Challenger / Massey Ferguson parts only.
AGCO assumes no responsibility for accidents,
operating problems or damaged caused by the use of
imitation parts. Also, the use of unauthorized parts
will result in relatively poor machine performance.
PRECAUTIONS TO BE FOLLOWED WHEN
INSTALLING STANDARDIZED PARTS
Roller or Ball Bearings
• When a bearing is installed in a housing by the outer
race, use an installer, which is specially designed to
push only the outer race and vice versa.
• The installer must be designed to install the bearing
on the shaft in a parallel position
• When installing a bearing which appears the same
on both sides, install it so that the face which has the
identification number faces in a direction for easy
visual identification. All the bearings which are to be
installed in the transmission case should be placed
so that their identification number faces outward.
• If a shaft or a hole where a bearing is to be installed
has an inner seat the bearing should be pushed in
completely until it is seated.
• Installed bearing should turn smoothly.
Oil Seals
• Oil seal installer should be used so as not to deform
the oil seals.
• During installation, be careful not to damage the lips,
and assure that it is pushed in parallel to the shaft or
hole.
• When oil seals are installed, there should be no
turnover of the lips nor dislocation of the springs.
• When a multi-lip seal is installed, the grooves
between lips should be filled with grease.
• Use a lithium-based grease.
• There should not be oil or water leaks past new seals.
O-Rings
• O-rings should be coated with grease before
installing.
• Installed O-rings should have no slack or twist.
• Installed O-rings should maintain proper tightness.
Snap Rings
• Snap ring installers should be designed so as not to
permanently deform the snap rings.
• Installed snap rings should be seated securely in the
groove.
• Be careful not to overload the snap ring to the extent
that it is permanently deformed.