Humboldt H-4156 Mechanical Loading Press for CBR - Manual (Page 3)

Introduction
The Mechanical Compression Machine has been designed to provide a simple and
reliable machine to cover a wide range of standard laboratory tests.
The loading machine meets the apparatus requirements of ASTM D 1883 and AASHTO
T193 allowing a steady rate of penetration load to be applied and load reading resolution
of 10Ibf over a 10,000Ibf (44.5kN) range. The two-speed jack design of the press allows
the following tests to be carried out:
• California Bearing Ratio / Lime Bearing Ratio (CBR/LBR)
• Unconfined Compression on 1.4" (38mm) diameter sample
• Unconfined Compression on 2.8" (70mm) diameter sample
• Soil–Cement
• UU (Quick) Tri-axial on 1.4" (38mm) diameter sample
• UU (Quick) Tri-axial on 2.8" (70mm) diameter sample
• Marshall Stability and Flow Test
General Information
Inspection:
Your Mechanical Loading Press compression machine was thoroughly inspected before
it was shipped and should be ready to operate as soon as you have completed the set-up
procedure. Notify Humboldt Mfg. Co. or your local agent and file a claim with any
carriers involved if you find any damage to the machine.
Physical Specification:
Shipping weight: 120 Ibs. (54.4 kg)
Overall height: 41 inches (1042mm)
Base dimension: 13-1/4" x 8" x 2-1/4" (337 x 203 x 57mm)
Initial Installation
Remove the packing list and verify that all parts have been received. Normally you will
receive one crate.
Set the machine base up at the place it is to be used in the laboratory and then check
that it is level by placing a spirit level on the platen. If it is not level adjust the resting
surface under the machine.
Assemble the jack handle to the appropriate shaft on the gearbox using the quick-release
detent pin provided.
Operation
Speed Control:
The input shafts extending from the front side of the gearbox drive the platen at the
following rate(s) per turn of the crank:
Right shaft: 0.0066 inch/revolution
Left shaft: 0.0023 inch/revolution