Description

Liebherr PR721C Crawler Loader Operating Manual

Liebherr PR721C Crawler Loader Index:

MACHINE DESCRIPTION
Diesel Engine
Splitter Box
Hydraulic System
Main Frame, Steel Structure, Covers
Undercarriage
Operator’s Platform, Cab and Canopy
Attachments
TECHNICAL DATA PR 721 C .
Dimensions – Basic Machine
TRANSPORT DIMENSIONS AND WEIGHTS
Basic Machine
Operator’s Cab
Canopy
Track Guard (1 piece)
Straight Blade
Push Arm left with Hydr- Tilt Cylinder and Brace
Push Arm – right with Braces
Angle Blade w, Braces
Frame
Power Angle and Tilt Blade
“C” Frame with Adaptor Plate
Multi Shank Ripper
Winch
Swinging Drawbar
Counterweight
GENERAL TECHNICAL DATA
Engine Installation
Engine Data
Air Cleaner
Coupling – Engine to Splitter box
Cooling System/Capacity
Fuel System/ Capacity .
Splitter box/Capacity
Hydraulic System
Closed LOOP Hydrostatic Drive
Attachment Hydraulics
Control Valve
Pilot (servo) Control Valve
Servo Pump

Hydraulic Tank
Hydraulic Oil Cooler
Hydraulic Oil Filters
undercarriage
Travel Drive
Electrical System
Cab Heater/Fresh Air
Attachments
Blade Lift Cylinder
Blade Tilt Cylinder(Straight Blade)
Ripper Cylinder
Blade Tilt Cyl inder (Angle Blade)
CAPACITIES
V-BELTS
COLD START DEVICE
FILTER ELEMENTS/ O-RINGS
Engine Filters
Hydraulic Filters
Cab Filters
O-Rings
SAFETY INFORMATION
Accident Prevention
General Safety Information
Crushing and Bum Prevention
Fire and Explosion Prevention
Machine Start-up Safety
Engine Start-up and Operati on Sa fety
Machine Operating Safety
Machine Towing and pulling Safety
Machine Parking Safety
Machine Transportation Safety
BEFORE STARTING THE ENGINE
Check Engine Oil Level
Check Coolant Level
Check Electrical System/Battery
Check Fuel System’ Fuel Level
Check Air FilterNacuum Indicator
Check Hydraulic Oil Level
Check Splitter Box Oil Level

Hydraulic System Maintenance and Repair
Hydrau lic Cylinders
Travel Gear
Travel Gear Maintenance
Travel Gear Parking Brake
Track Components
To Tighten Track Tension
TO Release Track Tension
Check Tightness of Track Pads and Sprocket Segments
Check and Adjust the Idler Guides
Cleaning the Track Components
Replace Track Chai n
Remove Sealed Track Chain
Install Sealed Track Chain
Remove SALT Chain
Install SALT Chain
Electrical System
Battery Maintenance
TO Repl ace Fuses
Heatingand Fresh Air System
Attachments
Cutting Edges and Corner Shanks
Blade Mounting. Push Arms and Braces
Ripper Shanks and Teeth
Replacement of Wear and Tear Items
Piston Rod Preservation
MAINTENANCE GUIDELINES .
Daily
Every 250 Operating Hours
Every 500 Operating Hours
Every 2000 Operating Hours
Lubrication Chart
Lubrication Points
TORQUE CHART
ELECTRICAL SCHEMATIC