Komatsu Backhoe-Loader WB91-93/M/WEAM002304/WB91R/WB93R-2: Every 50 Hours of Operation Maintenance

CHECKING THE RADIATOR FLUID LEVEL

DANGER!

Carry out this check with the machine parked on level ground and loader arm raised with engaged safety lock.

Do not remove the radiator cap when the fluid is hot, since the fluid may be sprayed out of the radiator and cause burns.

Loosen the cap slowly to release the pressure before removing it.

IMPORTANT:

If the level of the fluid in the radiator is low and the expan- sion tank is filled with coolant, check the tightness and make sure that there are no air leaks from the coupling that connects the radiator and the expansion tank. If the problem persists, contact your Komatsu Utility Dealer.

CHECKING THE BRAKING SYSTEM OIL LEVEL

The brake reservoir (1) can be reached after opening the engine hood (See “3.5.1 ENGINE HOOD”). This is a visual check and the reservoir must be topped up with the prescribed fluid until reaching the MAX.

IMPORTANT:

Use new oil only.

If constant and considerable leakages are observed, it is advisable to contact an Komatsu Utility Dealer to have the system checked and the necessary repairs carried out.

LUBRICATING THE PROPELLER SHAFTS

The lubrication must be carried out after carefully cleaning the grease nipples, by applying the greasing pump supplied together with the machine and using the prescribed grease.

Once the lubrication has been carried out, make sure that all the points have been lubricated and remove the contaminated grease that may have spread out of the joints.

3

4 LUBRICATING THE FRONT AXLE JOINTS CENTRAL COUPLING

The lubrication points (1) of the wheel joints are indicated in the figure and it is important to remember that they are located in symmetrical positions, while the central joint is lubricated by means of a grease nipple (2) positioned on the frame.

The lubrication must be carried out after carefully cleaning the grease nipples, by applying the greasing pump supplied together with the machine and using the prescribed grease. (See “4.3 FUEL, COOLANT AND LUBRICANTS”). Once the lubrication has been carried out, remove the contami- nated grease that may have spread out of the joints and of the central coupling.

CHECKING THE TYRE PRESSURE

This check is indispensable to preserve the tyres, keep them ef- ficient over time and make them last longer. The correct pressures are indicated in the specifications. (See “5.1 TECHNICAL DATA”).

While checking the pressure, check also the conditions of the tread and sidewalls.

DANGER!

Inflate the tyres only after positioning them in a protection cage.

Do not exceed the pressures prescribed in chapter “5.1 TECHNICAL DATA”.

To inflate the tyre, stand beside the external belt.

CHECKING THE ELECTRICAL SYSTEM

DANGER!

If the fuses are corroded, oxidized or not perfectly held in their seat, replace them only with fuses hav- ing the same capacity; before changing a fuse, make sure that the ignition key is in position «O ».

If there are signs of short circuit on the cables, find out the cause and repair them; always contact your Komatsu Utility Dealer for the troubleshooting.

Make sure that there are no disconnected cables or signs of short circuit in the electrical system. Make sure that all the cables are well tightened in the relevant terminals; tighten any loose cables. In particular, check:

Battery
Starter
Alternator

CHECKING THE RADIATOR FLUID LEVEL

DANGER!

Carry out this check with the machine parked on level ground and loader arm raised with engaged safety lock.

Do not remove the radiator cap when the fluid is hot, since the fluid may be sprayed out of the radiator and cause burns.

Loosen the cap slowly to release the pressure before removing it.

IMPORTANT:

If the level of the fluid in the radiator is low and the expan- sion tank is filled with coolant, check the tightness and make sure that there are no air leaks from the coupling that connects the radiator and the expansion tank. If the problem persists, contact your Komatsu Utility Dealer.

CHECKING THE BRAKING SYSTEM OIL LEVEL

The brake reservoir (1) can be reached after opening the engine hood (See “3.5.1 ENGINE HOOD”). This is a visual check and the reservoir must be topped up with the prescribed fluid until reaching the MAX.

IMPORTANT:

Use new oil only.

If constant and considerable leakages are observed, it is advisable to contact an Komatsu Utility Dealer to have the system checked and the necessary repairs carried out.

LUBRICATING THE PROPELLER SHAFTS

The lubrication must be carried out after carefully cleaning the grease nipples, by applying the greasing pump supplied together with the machine and using the prescribed grease.

Once the lubrication has been carried out, make sure that all the points have been lubricated and remove the contaminated grease that may have spread out of the joints.

3

4

LUBRICATING THE FRONT AXLE JOINTS CENTRAL COUPLING

The lubrication points (1) of the wheel joints are indicated in the figure and it is important to remember that they are located in symmetrical positions, while the central joint is lubricated by means of a grease nipple (2) positioned on the frame.

CHECKING THE TYRE PRESSURE

This check is indispensable to preserve the tyres, keep them ef- ficient over time and make them last longer. The correct pressures are indicated in the specifications. (See “5.1 TECHNICAL DATA”).

While checking the pressure, check also the conditions of the tread and sidewalls.

DANGER!

Inflate the tyres only after positioning them in a protection cage.

Do not exceed the pressures prescribed in chapter “5.1 TECHNICAL DATA”.

To inflate the tyre, stand beside the external belt.

CHECKING THE ELECTRICAL SYSTEM

DANGER!

If the fuses are corroded, oxidized or not perfectly held in their seat, replace them only with fuses hav- ing the same capacity; before changing a fuse, make sure that the ignition key is in position «O ».

If there are signs of short circuit on the cables, find out the cause and repair them; always contact your Komatsu Utility Dealer for the troubleshooting.

Make sure that there are no disconnected cables or signs of short circuit in the electrical system. Make sure that all the cables are well tightened in the relevant terminals; tighten any loose cables. In particular, check:

Battery

Starter

Alternator