Fluids And Lubricants - jcb JS300 Service Manual

Maintenance
Maintenance Safety
Soft Ground
A machine can sink into soft ground. Never work under a machine on soft ground.
Working Under the Machine
Make the machine safe before getting beneath it. Make sure that any attachments on the machine are correctly
attached. Engage the park brake (if installed), remove the ignition key, disconnect the battery. If the machine
has wheels use blocks to prevent unintentional movement.
Lifting the Machine
Under no circumstances must the engine be run with the transmission in gear and only one driving wheel jacked
clear of the ground, since the wheel on the ground will move the machine.
Chemicals
Certain seals and gaskets (e.g. crankshaft oil seal) on JCB machines contain fluoroelastomeric materials
such as Viton®, FluorelTM and Technoflon®. Fluoroelastomeric materials subjected to high temperatures can
produce highly corrosive hydrofluoric acid. This acid can severely burn. New fluoroelastomeric components
at ambient temperature require no special safety precautions. Used fluoroelastomeric components whose
temperatures have not exceeded 300°C (571.6°F) require no special safety precautions. If evidence of
decomposition (e.g. charring) is found, refer to the next paragraph for safety instructions. Do not touch
component or surrounding area. Used fluoroelastomeric components subjected to temperatures greater than
300°C (571.6°F) (e.g. engine fire) must be treated using the following safety procedure. Make sure that heavy
duty gloves and special safety glasses are worn: Thoroughly wash contaminated area with 10% calcium
hydroxide or other suitable alkali solution, if necessary use wire wool to remove burnt remains. Thoroughly
wash contaminated area with detergent and water. Contain all removed material, gloves etc. used in this
operation in sealed plastic bags and dispose of in accordance with Local Authority Regulations. Do not burn
fluoroelastiometric materials.
Hydraulic Hoses
Never re-use hydraulic hose end crimps or use reusable hose end crimps.

Fluids and Lubricants

Oil
Oil is toxic. If you swallow any oil, do not induce vomiting, seek medical advice. Used engine oil contains harmful
contaminants which can cause skin cancer. Do not handle used engine oil more than necessary. Always use
barrier cream or wear gloves to prevent skin contact. Wash skin contaminated with oil thoroughly in warm soapy
water. Do not use petrol, diesel fuel or paraffin to clean your skin.
Fluid Under Pressure
Fine jets of fluid at high pressure can penetrate the skin. Keep face and hands well clear of fluid under pressure
and wear personal protective equipment. Hold a piece of cardboard close to suspected leaks and then examine
the cardboard for signs of fluid. If fluid penetrates your skin, get medical help immediately.
Fuel
Fuel is flammable, keep naked flames away from the fuel system. Stop the engine immediately if a fuel leak is
suspected. Do not smoke while refuelling or working on the fuel system. Do not refuel with the engine running.
Completely wipe off any spilt fuel which could cause a fire. There could be a fire and injury if you do not follow
these precautions.
Hygiene
JCB lubricants are not a health risk when used correctly for their intended purposes.
However, excessive or prolonged skin contact can remove the natural fats from your skin, causing dryness
and irritation.
Low viscosity oils are more likely to do this, so take special care when handling used oils, which might be
diluted with fuel contamination.
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