INTRODUCTION RT540E SERVICE MANUAL
1-8 Published 4-20-2015, Control # 502-01
Flat metal locks must be installed properly to be effective.
Bend one end of the lock around the edge of the part. Bend
the other end against one flat surface of the nut or bolt head.
Always use new locking devices on components which have
moving parts.
When installing lockwashers on housings made of
aluminum, use a flat washer between the lockwasher and
the housing.
Wires and Cables
Batteries should always be disconnected prior to working on
the electrical system.
When removing or disconnecting a group of wires or cables,
tag each one to ensure proper identification during assembly.
Shims
When shims are removed, tie them together and identify
them as to location. Keep shims clean and flat until they are
reinstalled.
Bearings
Antifriction Bearings
When an anti friction bearing is removed, cover it to keep out
dirt and abrasives. Wash bearings in non-flammable
cleaning solution and allow them to drain dry. The bearing
may be dried with compressed air BUT do not spin the
bearing. Discard the bearings if the races and balls or rollers
are pitted, scored, or burned. If the bearing is serviceable,
coat it with oil and wrap it in clean waxed paper. Do not
unwrap new bearings until time of installation. The life of an
anti friction bearing will be shortened if not properly
lubricated. Dirt in an anti friction bearing can cause the
bearing to lock resulting in the shaft turning in the inner race
or the outer race turning within the cage.
Double Row, Tapered Roller
Double row, tapered roller bearings are precision fit during
manufacture and components are not interchangeable. The
cups, cones, and spacers are usually etched with the same
serial number and letter designator. If no letter designators
are found, wire the components together to assure correct
installation. Reusable bearing components should be
installed in their original positions.
Heating Bearings
Bearings which require expansion for installation should be
heated in oil not to exceed 121°C (250°F). When more than
one part is heated to aid in assembly, they must be allowed
to cool and then pressed together again. Parts often
separate as they cool and contract.
Installation
Lubricate new or used bearings before installation. Bearings
that are to be preloaded must have a film of oil over the entire
assembly to obtain accurate pre-loading. When installing a
bearing, spacer, or washer against a shoulder on a shaft, be
sure the chamfered side is toward the shoulder.
When pressing bearings into a retainer or bore, uniformly
apply pressure to the outer race. If the bearing is pressed on
the shaft, uniformly apply pressure on the inner race.
Preload
Preload is an initial load placed on the bearing at the time of
assembly. Whether a tapered roller bearing should have
preload could depend on any of several conditions: rigidity of
the housings and shaft, bearing spread, speed of operation,
etc.
To determine whether a bearing requires preload or end
clearance, consult the disassembly and assembly
instructions pertaining to that bearing.
Care should be exercised in applying preload. Misapplication
of preload to bearings requiring end clearance can result in
bearing failure.
Sleeve Bearings
Do not install sleeve bearings with a hammer. Use a press
and be sure to apply the pressure directly in line with the
bore. If it is necessary to drive on a bearing, use a bearing
driver or a bar with a smooth flat end. If a sleeve bearing has
an oil hole, align it with the oil hole in the mating part.
Gaskets
Be sure the holes in the gaskets correspond with the
lubricant passages in the mating parts. If it is necessary to
make gaskets, select material of the proper type and
thickness. Be sure to cut holes in the right places. Blank
gaskets can cause serious damage.
When removed, always install new cylinder head and
manifold gaskets using recommended gasket compound on
head gaskets to allow uniform sealing.
Batteries
Clean batteries by scrubbing them with a solution of baking
soda and water. Rinse with clear water. After cleaning, dry
thoroughly and coat terminals and connections with an anti
corrosion compound or grease.
If the machine is to be stored or not used for an extended
period of time, the batteries should be removed. Store the
batteries in a cool (not subfreezing), dry place, preferably on
wooden shelves. Never store on concrete. A small charge
should be introduced periodically to keep the specific gravity
rating at recommended level.
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