Foreword and general information
Safety notice
PC800, 850-8E0
2.
Preparation work
1) Before adding oil or making any repairs, park
the machine on a hard and level ground, and
apply the parking brake and chock the
wheels or tracks to prevent the machine from
moving.
2) Before starting work, lower the work equip-
ment (blade, ripper, bucket, etc.) to the
ground. If this is not possible, insert the lock
pin or use blocks to prevent the work equip-
ment from falling. In addition, be sure to lock
all the control levers and hang warning tag on
them.
3) When disassembling or assembling, support
the machine with blocks, jacks, or stands
before starting the work.
4) Remove all mud and oil from the steps or
other places used to get on and off the
machine. Always use the handrails, ladders
or steps when getting on or off the machine.
Never jump on or off the machine. If it is
impossible to use the handrails, ladders or
steps, use a stand to provide safe footing.
3.
Precautions during work
1) Before disconnecting or removing compo-
nents for the oil, water, or air circuits, first
release the pressure completely from the
circuit. When removing the oil filler cap, a
drain plug, or an oil pressure pickup plug,
loosen it slowly to prevent the oil from
spurting out.
2) The coolant and oil in the circuits are hot
when the engine is shut down, so be careful
not to get scalded. Wait for the oil and coolant
to cool before performing any work on the oil
or water circuits.
3) Before starting work, shut down the engine.
When working on or around a rotating part, in
particular, shut down the engine. When
checking the machine without shutting down
the engine (measuring oil pressure, revolving
speed, temperature, etc.), take extreme care
not to get caught in rotating parts or moving
parts.
4)
For the machine equipped with a battery
disconnct switch, turn the battery discon-
nect switch to the OFF (O) position and
pull the switch key out, before starting the
work.
For machines without a battery
disconnct switch, remove the cable from the
battery , before starting the work. Always
remove the cable from the negative (-)
terminal first.
5) When raising a heavy component (heavier
than 25 kg), use a hoist or crane. Before
starting work, check that the slings (wire
ropes, chains, and hooks) are free from
damage. Always use slings which have
ample capacity and install them to proper
places. Operate the hoist or crane slowly to
prevent the component from hitting any other
part. Do not work with any part still raised by
the hoist or crane.
6) When removing a cover which is under
internal pressure or under pressure by a
spring, always leave two bolts in diagonal
positions. Loosen those bolts gradually and
alternately to release the pressure, and then
remove the cover.
7) When removing components, be careful not
to break or damage the electrical wiring.
Damaged wiring may cause electrical fires.
8) When removing piping, stop the fuel or oil
from spilling out. If any fuel or oil drips onto
the floor, wipe it off immediately. Fuel or oil
on the floor can cause you to slip and can
even cause fires.
9) As a general rule, do not use gasoline to
wash parts. Do not use it to clean electrical
parts, in particular.
10)Be sure to assemble all parts again in their
original places. Replace any damaged parts
and parts which must not be reused with new
parts. When installing hoses and wires, be
sure that they will not be damaged by contact
with other parts when the machine is oper-
ated.
11)When installing high pressure hoses and
tubes, make sure that they are not twisted.
Damaged hoses and tubes are dangerous,
so be extremely careful when installing
hoses and tubes for high pressure circuits. In
addition, check that connections of them are
correct.
(03)
00-13
