Fiat Allis 645B Loader Complete Service Manual

(1 customer review)

Original price was: $129.99.Current price is: $81.50.

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


  • 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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It’s simple – after purchasing this manual through our secure checkout, a download link will be sent to the email address you specify at checkout. You have up to 90 days to retrieve and save the file. Once saved, the manual is yours for good.

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645B Loader Specifications

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 (7.0 lit)
Type Twin-turbine
Torque multiplication 5.05 to 1
Type Power shift planetary
Rear axle oscillation  22°
Inches vertical travel  15″ (381 mm)
Service – 4 wheel, air over hydraulic, dual system.
Emergency-dash mounted lever actuates service brakes.
Parking-mechanically actuated drum brake on drive line
Type Tubeless
Standard 20.5-25 (12 PR) L3
Optional 17.5-25 (12 PR) L2. L3
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.
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.
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.
Lube oil  Full flow 25 micron
Fuel  Full flow 5 micron
Air cleaner Dry type w/safety element
Coolant Filter conditioner
Oil Full flow 25 micron
Oil Full flow 25 micron
Full flow magnetic
Full flow wire mesh
Pressure-vacuum relief 40 micron element

SKU: FA-645B-SM Categories: , Tag:

1 review for Fiat Allis 645B Loader Complete Service Manual

  1. Delmar (verified owner)

    Can’t beat this manual for the price.

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