637 TRACTOR-SCRAPER Safety Caterpillar


Lower bowl and apron before servicing tractor-scraper.

Block bowl and apron before changing cutting edge or routing bits.

Use a self attaching air chuck and stand behind tread when inflating tires.

------ WARNING! ------

To avoid possible weakening of the ROPS (Rollover Protection Structure), consult a AVSpare dealer before altering the ROPS in any way. The protection offered by the ROPS will be impaired if it has been subjected to structural damage or has been involved in an overturn incident.


Do not allow unauthorized personnel on machine when it is being serviced.

Score oily rags and other combustible material in a safe place.

Promote good housekeeping. Keep tools and work area clean.

Do not attempt repairs you do not understand.

Operate engines only in well ventilated areas.

------ WARNING! ------

When using pressure air, wear safety face shield and protective clothing. Use 30 PSI (2 kg/cm2) maximum pressure air for cleaning purposes.


Do not attempt adjustments while tractor-scraper is moving or the engines are running.

Use caution when removing radiator cap, drain plugs, grease fittings or pressure taps.

Wear safety glasses and shoes as required.

Do not smoke while refueling.

Replace or repair broken or damaged equipment. Use proper tools.

Attach tags to controls while tractor-scraper is being serviced.

Turn disconnect switch OFF and remove key before servicing electrical system.

Read warning and caution information provided on the tractor-scraper. Follow servicing instructions carefully.