SECTION 2 - GENERAL
31215079
2-5
2.3
SERVICE AND GUIDELINES
General
The following information is provided to assist you in
the use and application of servicing and maintenance
procedures contained in this book.
Safety and Workmanship
Your safety, and that of others, is the first consideration
when engaging in the maintenance of equipment.
Always be conscious of weight. Never attempt to move
heavy parts without the aid of a mechanical device. Do
not allow heavy objects to rest in an unstable position.
When raising a portion of the equipment, ensure that
adequate support is provided.
Cleanliness
1. The most important single item in preserving the
long service life of a machine is to keep dirt and for-
eign materials out of the vital components. Precau-
tions have been taken to safeguard against this.
Shields, covers, seals, and filters are provided to keep
air, fuel, and oil supplies clean; however, these items
must be maintained on a scheduled basis in order to
function properly.
2. At any time when air, fuel, or oil lines are discon-
nected, clean adjacent areas as well as the openings
and fittings themselves. As soon as a line or compo-
nent is disconnected, cap or cover all openings to
prevent entry of foreign matter.
3. Clean and inspect all parts during servicing or main-
tenance, and assure that all passages and openings
are unobstructed. Cover all parts to keep them clean.
Be sure all parts are clean before they are installed.
New parts should remain in their containers until
they are ready to be used.
Components Removal and Installation
4. Use adjustable lifting devices, whenever possible, if
mechanical assistance is required. All slings (chains,
cables, etc.) should be parallel to each other and as
near perpendicular as possible to top of part being
lifted.
5. Should it be necessary to remove a component on an
angle, keep in mind that the capacity of an eyebolt or
similar bracket lessens, as the angle between the
supporting structure and the component becomes
less than 90°.
6. If a part resists removal, check to see whether all
nuts, bolts, cables, brackets, wiring, etc., have been
removed and that no adjacent parts are interfering.
Component Disassembly and Reassembly
When disassembling or reassembling a component,
complete the procedural steps in sequence. Do not par-
tially disassemble or assemble one part, then start on
another. Always recheck your work to assure that noth-
ing has been overlooked. Do not make any adjustments,
other than those recommended, without obtaining
proper approval.
Pressure-Fit Parts
When assembling pressure-fit parts, use an anti-seize or
molybdenum disulfide base compound to lubricate the
mating surface.
Bearings
1. When a bearing is removed, cover it to keep out dirt
and abrasives. Clean bearings in nonflammable
cleaning solvent and allow to drip dry. Compressed
air can be used but do not spin the bearing.
2. Discard bearings if the races and balls (or rollers) are
pitted, scored, or burned.
3. If bearing is found to be serviceable, apply a light
coat of oil and wrap it in clean (waxed) paper. Do not
unwrap reusable or new bearings until they are
ready to install.
4. Lubricate new or used serviceable bearings before
installation. When pressing a bearing into a retainer
or bore, apply pressure to the outer race. If the bear-
ing is to be installed on a shaft, apply pressure to the
inner race.
Gaskets
Check that holes in gaskets align with openings in the
mating parts. If it becomes necessary to hand-fabricate
a gasket, use gasket material or stock of equivalent
material and thickness. Be sure to cut holes in the right
location, as blank gaskets can cause serious system
damage.
Bolt Usage and Torque Application
1. Use bolts of proper length. A bolt which is too long
will bottom before the head is tight against its
related part. If a bolt is too short, there will not be
enough thread area to engage and hold the part
properly. When replacing bolts, use only those hav-
ing the same specifications of the original, or one
which is equivalent.
Go to
Discount-Equipment.com
to
order your
parts
