jcb JS200 Service Manual page 19

Section 2
4 - 2
Maintenance Safety (continued)
! ! CAUTION
Arc Welding
Before carrying out any arc welding on the machine,
completely remove the Control Computer to avoid damage to
the circuits; also disconnect the alternator plug and battery
leads.
When welding items to the mainframe make sure that the
earth clamp is positioned on the mainframe and when
welding to the undercarriage make sure that the earth clamp
is positioned on the undercarriage. If you earth one and weld
the other, you may cause severe damage to the slew ring.
Always connect the earth clamp to any other component
being welded, i.e. boom or dipper, to avoid damage to pivot
pins and bushes.
8-1-2-6/1
! ! WARNING
Hydraulic Hoses
Damaged hoses can cause fatal accidents. Inspect the
hoses regularly for:
Damaged end fittings
Chafed outer covers
Ballooned outer covers
Kinked or crushed hoses
Embedded armouring in outer covers
Displaced end fittings.
INT-3-3-2
! ! WARNING
DO NOT remove the hydraulic tank filler cap or cover plate
when the engine is running. The hydraulic system is under
pressure. You or others could be injured. First stop the
engine and then release the pressure.
8-3-4-4/1
! ! WARNING
Hydraulic Pressure
Hydraulic fluid at system pressure can injure you. Before
disconnecting or connecting hydraulic hoses, stop the engine
and operate the controls to release pressure trapped in the
hoses. Make sure the engine cannot be started while the
hoses are open.
INT-3-1-11/1
! WARNING !
Hydraulic Fluid
Fine jets of hydraulic fluid at high pressure can penetrate the
skin. Do not use your fingers to check for hydraulic fluid
leaks. Do not put your face close to suspected leaks. Hold a
piece of cardboard close to suspected leaks and then inspect
the cardboard for signs of hydraulic fluid. If hydraulic fluid
penetrates your skin, get medical help immediately.
INT-3-1-10/1
9803/6400
Care & Safety
The efficiency of the rams will be affected if they are not kept
free of solidified dirt. Clean dirt from around the rams
regularly. When leaving or parking the machine, close all
rams if possible to reduce the risk of weather corrosion.
INT-3-2-10
Cleaning metal parts with incorrect solvents can cause
corrosion. Use only recommended cleaning agents and
solvents.
INT-3-2-11
Badly fitted, damaged or rotted 'O'-rings, seals and gaskets
can cause leakages and possible accidents. Renew
whenever disturbed unless otherwise instructed. Do not use
Trichloroethane or paint thinners near 'O' rings and seals.
INT-3-2-12
The cooling system is pressurised when the engine is hot.
Hot coolant can spray out when you remove the radiator cap.
Let the system cool before removing the radiator cap. To
remove the cap; turn it to the first notch and let the system
pressure escape, then remove the cap.
INT-3-2-9
If the machine is operated at full load, before its initial run-in
procedure is complete, it may cause scuffing and seizing
which can adversely effect the service life of the machine.
8-3-1-5
! CAUTION !
Rams
! CAUTION !
Cleaning
! CAUTION !
'O'-rings, Seals and Gaskets
! WARNING !
Hot Coolant
! CAUTION !
Section 2
4 - 2
Issue 1