The compactness and mobility of the Jeep Air Compressors have made them extremely popular with contractors, government construction and maintenance departments and armed services, as well as a host of other groups such as farmers, garagemen, painters, and logging operators.

A Jeep mounted air compressor makes a dependable supply of compressed air available for a multitude of jobs, no matter where the work site happens to be. Existing power outlets are no longer a limited factor.

Since the compressor is both powered and transported by the same vehicle - the sturdy four-wheel drive Jeep - one man can drive and operate the unit.  This gives the Jeep air compressor greater operating scope than most trailer-mounted compressors or those mounted in the back of two-wheel drive trucks.

USES OF MOBILE AIR COMPRESSORS - Compressed air can be harnessed in a number of different ways. Some of the main uses we are listing below:

A) Hammers - Jack hammers, pavement breaker, rock drilling, body fender hammers.

B) Farming - Tree pruning, spraying operations.

C) Painting - Dusting gun, paint spray gun, atomizers.

D) Tire tools - Rim stripper, tire changer, air pump.

E) Garage operations - Air filter cleaner, body polisher, body sander, carbon remover, car rocker, radiator tester, spark plug tester, brake tester, grease gun, and tire filler.

F) Logging - Saws, bark strippers.

The Schramm 60 and 105 Air Compressors, both factory approved, can be installed in Toledo or in the field. Discussion of these two units will supply the type of information necessary for other adaptations.

The Schramm 60 CFM Compressor is a four-cylinder-V-type, single stage, air cooled compressor with 3-1/4" bore and 3-1/4" stroke. The light weight and compactness of this compressor makes it extremely well adapted to mounting in the Jeep. The compressor is bolted to a heavy adjustable base, which, in turn, is rigidly attached to the Jeep frame by means of suitable reinforcing cross members and brackets. No part of the load is imposed upon the body. This well-balanced construction results in smooth, vibrationless operation.

The simplicity of construction in the compressor itself results from use of the single stage principle of design which eliminates the inter-cooler and fan. The capacity control unit which is standard equipment consists of three units: the engine slow-down assembly, the pilot valve, the unloader assembly. They function in the following manner. When the pressure in the receiving tank reaches a pre-determined figure, the pilot valve allows air to flow to the unloader valve which causes the intake valves of the compressor to remain open. Immediately after this happens, the pilot valve sends air to the engine slow-down assembly.  The speed of the engine will be slowed down to idle until the pressure level in the receiving tanks drops about 5 lbs. At that instant the engine is speeded up due to the action of the engine slow-down assembly, and the next instant the intake valves of the compressor are allowed to close and the compressor goes back to work. These operations are carefully synchronized so as to maintain a constant pressure in the receiving tank.

The intake valves of the compressor are mechanically operated and the discharge valves located in the cylinder heads are of the disc type and spring mounted.

The compressor's lubrication system is splash type, and is provided with an oil pump, oil pressure gauge, oil filter and bayonet for checking oil level in sump.

The drive is completely enclosed, both for the protection of the operator and to keep it clean. A matched set of four "V" belts drive the specially designed power take-off sheave. Belt tension is adjusted by positive takeup.

The compressor is operated in third gear and neutral in the transfer case. It is ready to operate just as quickly as the right tool can be attached to the hose reel.

THE SCHRAMM 105 CFM COMPRESSOR operates on roughly the same principle as the 60 CFM. The major differences are:

1) 75% more capacity than the 60 CFM. This allows the 105 CFM to tackle bigger, longer operating cycle jobs.

2) The 105 CFM compressor is a vertical liquid cooled unit with separate head and oil pan.

3) The 105 CFM is driven by a matched set of 6 "V" belts.

4) The 105 CFM can be supplied with twin hose reels if needed. (Optional rear seat cannot be installed with this arrangement).

5) The 105 CFM can furnish enough air to operate two 80 pound air hammers.

SPECIFICATIONS OF SCHRAMM 60 CFM COMPRESSOR

GENERAL: The Schramm 60 CFM Compressor is a four cylinder, single stage cycle compressor. Cylinders cast in pairs, 90 degree "V" type, L-head with integral intake and discharge ports. The cylinder head design permits mounting of discharge valves directly over pistons. Separate intake and discharge passages are provided. Both cylinder blocks and heads have deep cast fins to promote rapid dissipation of heat. Cylinders are bolted to crankcase which contains crankshaft, camshaft and lubricating system.

CAPACITY: The Schramm 60 CFM Compressor has four cylinders with a 3.25" bore and 3.25" stroke and a piston displacement of 112.34 cubic feet at 1800 R.P.M. Actual air delivery: 60 CFM at 100 lbs. pressure.

CRANKSHAFT: Drop-forged, heat-treated steel. Balanced statically and dynamically. Mounted on Timken taper roller bearings.

CAMSHAFT: Heat-treated, drop-forged steel. Double lobed cams and fuel pump eccentric finely ground and integral with shaft.

PISTONS: Aluminum alloy weighed and matched for balance. Each piston is fitted with two compression and two oil control rings.

CONNECTING RODS: Heat-treated, drop-forged steel with spun-in babbitt bearing at crank pin and bronze bushed for piston pin.

INTAKE VALVES AND UNLOADERS: Poppet type cam operated. Patented air operated unloading device is part of valve mechanism and holds valves wide open during entire unloading period.

DISCHARGE VALVES: Ground tempered steel discs, spring seated on manganese bronze. Low lift type in readily removable cages, in cylinder head, directly above and nearly covering piston area.

PILOT VALVE: Adjustable. Controls loading and unloading of the compressor and regulates flow of air to the engine slow-down. An adjustable check valve retards the air return to atmosphere and allows the engine to speed up before the compressor loads.

ENGINE SLOW-DOWN: Automatically reduces the engine speed while compressor unloads. It operates carburetor throttle valve.

LUBRICATION: Gear -type oil pump forces a stream of oil to each rod bearing and fills crankcase with an oil fog which lubricates cylinders, camshaft, main bearings and valve mechanism.

COOLING: Deeply finned cylinders and heads are surrounded with shrouds conducting air blast from flywheel blower to all parts.

AIR RECEIVER: 14" x 26 I f . Built to A.S.M.E. National Board and Massachusetts Codes and are inspected for compliance therewith.

ACCESSORIES: A Safety Valve, Fusible Plug, Pressure Gauge and Drain Cock are furnished for receiver. Compressor is equipped with an oil bath air filter, oil pressure. gauge and oil filter.

 

SPECIFICATIONS OF SCHRAMM 105 CFM COMPRESSOR

GENERAL: The Schramm 105 CFM Compressor is a four cylinder, single stage air compressor. It is a vertical, liquid cooled unit, with separate head and oil pan. The cylinders and top half of the crankcase are cast integral and contain the five main crankshaft bearings and the three camshaft bearings, the intake valves and the intake manifolds. The cylinder head contains only the discharge valves, the built-in aftercooler and the jackets for liquid cooling. The lubrication lines are drilled in the compressor block casting.

CAPACITY: The Schrlvm 105 CFM Compressor has four cylinders with 3-13/16" bore, 4-1/2 stroke, and piston displacement of 157 CFM at 1320 R.P.M. Actual free air delivery is 105 CFM at 100 lbs. gauge pressure.

CRANKSHAFT: Drop-forged, heat-treated steel, mounted on five main bearings, drilled for the passage of oil from the main bearings to the crank pins.

PISTONS: Cast iron, weighed and matched for balance. Each piston is fitted with two compression and two oil control rings.

CONNECTING RODS: Heat-treated, drop-forged steel, with steel-backed, babbitt lined, precision type shells in the crank pin end and bronze bushing for the piston pin.

INTAKE VALVES AND UNLOADERS: Poppet type cam operated. Patented air operated unloading device is a part of valve mechanism and holds valves wide open during the entire unloading period.

DISCHARGE VALVES: Steel discs, tempered and lapped flat, spring seated on manganese bronze. Low lift type in readily removable cages, in cylinder head, directly above and nearly covering piston area.

PILOT VALVE: Adjustable, controls loading and unloading of the compressor, and slows engine speed when unloaded. An adjustable check valve permits the engine acceleration before compressor is loaded.

ENGINE SLOW-DOWN: Automatically reduces the engine speed while compressor is unloaded. It operates carburetor throttle.

LUBRICATION: Gear-type oil pump forces oil under pressure to main bearings, camshaft bearings, crank pins and piston pins and fills crankcase with an oil fog that lubricates pistons and valve mechanism.

COOLING: Cylinders and heads are surrounded by jackets through which cooling liquid is forced by a pump. Liquid is cooled by radiator with fan.

AIR RECEIVER: 14" x 26" . Built to A.S.M.E. National Board and Massachusetts Codes and inspected for compliance therewith.

ACCESSORIES: A Safety Valve, Fusible Plug, Pressure Gauge and Drain Cock are furnished for Receiver. Compressor is equipped with Oil Bath Air Cleaner and Oil Pressure Gauge.