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Allis Chalmers 6060, 6070, & 6080 Tractor Data Sheet

Engine Information: 433 Diesel
Cubic Inches
Liters
Number of Cylinders
Bore Size
Stroke
Engine Torque Specs
Rod Bearing Torque
Main Bearing Torque
Cylinder Head Torque
Firing Order
Intake Valve Lash
Exhaust Valve Lash
6060 Serial Number to (Year)
6080 Serial Number to (Year)

  • Bulletin:  Connecting Rod Bolt Torque Caution For Allis Chalmers 201, 301 & 426 Cubic Inch Engines
The AERA Technical Committee offers the following information on connecting rod bolt torque specifications for Allis-Chalmers engines.
This information applies to both early and late style engines, as several different hardware combinations have been used. 
Two different connecting rod and cap mating surface finishes were used and identification can be made by visual inspection. Early style
connecting rods have a serrated mating surface between the cap and the rod. Middle and Late style connecting rods can be identified
by smooth/machined surfaces between the cap and the rod.
ALL MODELS
When installing, use a light amount of engine oil on capscrew threads and on the underside of the capscrew head at the mating surface. Tighten
hardware using a minimum of two incremental torque steps, three on higher torque hardware (7.0L). Non-serrated connecting rod caps MUST
be aligned with the rod during installation. To do so, install hardware finger tight, use two feeler gauges between the rod/cap assembly and the
side of journal to hold assembly snug to one side of journal. Tighten hardware in multiple steps and then remove feeler gauges.
Allis-Chalmers engine models: 2000 series, 3.3 and 4.9-liter series (2200, 2800, 2900, 433 & 649 types, etc.)

Early style rods use hex-head capscrew with washer. The rod cap bolt holes have a 30° degree chamfer. Capscrew size used is .375" 24 x 2.00"
long, grade 8, tighten those capscrews to 50 ft/lbs.
Later style rods have the rod cap chamfer deleted and a new 12-point capscrew introduced. Capscrew size used is .375" - 24 x 2.00" long, grade
100, tighten those capscrews to 45 ft/lbs.
Note: Do not use later 12-point capscrews in early-serrated rods with chamfered holes or loosening of capscrews will occur. Early rods may be
machined and balanced to accept later capscrews.
Allis-Chalmers engine models: 3000 Series, 7.0 liter series (3400, 3500, 3700, 3750 & 670 types, etc.)
Early style rods use serrated rod caps with hexhead capscrews and washers. Capscrew size .437" 20 x 2.25" grade 8, tighten those capscrews to
85 ft/lbs.
Middle style rods use smooth machined rod and cap mating surfaces. Socket head capscrew size .437" 20 x 2.156" long, grade 100, tighten
those capscrews to 70 ft/lbs.
Later style rods use smooth machined rod and cap mating surfaces. 12-point capscrew size .437" 20 x 2.156" long, grade 100, tighten
those capscrews to 70 ft/lbs.
Note: Do not use middle or later type hardware in early-serrated connecting rods.
*Agkits.com cannot be held responsible for the accuracy of this data.