Fiat Allis 645B Loader Complete Service Manual

Covers: Fiat Allis 645B Wheel Loader
Pages: 1,045
Format: PDF
File size: 214mb
Compatibility: Windows/Mac/Tablet/Smartphone
Notes: Instant digital download only – no printed copy or CD-ROM media.

This manual contains detailed service and repair procedures, specifications and illustrations for Fiat Allis 645B wheel loaders. The service manual provides the most accurate information available and is a must for Fiat Allis 645B loader owners, operators and mechanics. Print off  pages at any time. Save time and money on repairs with this professional grade manual.

BONUS: Includes Operator’s Maintenance Manual and Parts Manual

Topics:

• General Information
• Specifications
• Torque Specs
• Technical Data
• Machine Operation
• Maintenance Schedule and Procedures
• Engine Service and Overhaul
• Fuel System
• Turbocharger
• Transmission Service and Overhaul
• Torque Converter
• Axles
• Brakes
• Power Steering
• Bucket
• Chassis
• Cab
• Hydraulic System & Components
• Electrical System & Components
• Hydraulic Circuit Schematic
• Electrical Wiring Diagrams
• Detailed Part Numbers and Illustrations
• And much more…

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645B Loader Specifications

ENGINE
Make Allis-Chalmers
Model 3500 Mark II turbo-charged diesel
Governed rpm 2200
Maximum torque
ft.-lbs. @rpm 443 ft.-lbs.@ 1600 rpm
kg-m @rpm  61.3 kgm@ 1600 rpm
Bore & stroke 4.25″ x 5 .O” ( 108 x 127 mm)
Number of cylinders 6
Displacement 426 cu.in. (7.0 lit)
TORQUE CONVERTER
Type Twin-turbine
Torque multiplication 5.05 to 1
TRANSMISSION
Type Power shift planetary
AXLES
Rear axle oscillation  22°
Inches vertical travel  15″ (381 mm)
BRAKE SYSTEMS
Service – 4 wheel, air over hydraulic, dual system.
Emergency-dash mounted lever actuates service brakes.
Parking-mechanically actuated drum brake on drive line
TIRES
Type Tubeless
Standard 20.5-25 (12 PR) L3
Optional 17.5-25 (12 PR) L2. L3
ELECTRICAL SYSTEM
20.5-25 (12 PR! L2
20.5-25 (16 PR) L2. L3
Voltage  24V
Standard alternator 30 amp
Battery amp/hour rating 180
System protected by circuit breakers.
LOADER HYDRAULIC SYSTEM
Type Closed with pressure & vacuum relief
Cylinders Double acting
Lift (2) 6.0″ x 32.5″ (152 x 826 mm)
Dump (2) 5.5″ x 37.25″ (140 x 946 mm)
Pump Gear type tandem-mounted
Capacity@ governed rpm 71.0 gpm (268.7 lit/min)
Control valve Two spool
Relief valve pressure 1825 psi (130 kg/cm2)
Lift time 6.5 sec.
Lower time 4.8 sec.
Dump time 3.0 sec.
STEERING SYSTEM
Type Hydraulic power
Cylinders Two, double acting
Bore & stroke  3.0″ x 19.19″ (76 x 487 mm)
Pump Gear type
Capacity @ governed rpm 18.0 gpm (68. 1 lit/min)
*With demand valve interconnection to loader hydraulic system. and mechanical follow-up linkage.
FILTRATION SYSTEMS
ENGINE
Lube oil  Full flow 25 micron
Fuel  Full flow 5 micron
Air cleaner Dry type w/safety element
Coolant Filter conditioner
TRANSMISSION-TORQUE CONVERTER
Oil Full flow 25 micron
HYDRAULIC
Oil Full flow 25 micron
Full flow magnetic
Full flow wire mesh
Pressure-vacuum relief 40 micron element