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Your
Operation
and Care
Manual
Universal Jeep
Model CJ-2A
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Foreword IN YOUR possession is a motor vehicle that has been thoroughly tested and inspected. Like any other piece of machinery, to maintain it in first class condition, you should lubricate it at the time prescribed with the proper grade of oil and grease and keep all working parts and oil holes clean and free of dirt and grit. You should also periodically have it systematically inspected at an Authorized Willys-Overland Service Station. In the following pages we have set forth the knowledg
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Jeep CJ2A Specifications on The CJ2A Page Engine "Go-Devil" L-Head Number of cylinders........................................4 4 Bore...............................................................3 1/8" 79.37 mm. Stroke............................................................4 3/8" 111.12 mm. Piston Displacement........................................134.2 cu. in. 2199.53 cc. Compression Ratio..........................................6.48 to 1 Horsepower -- SAE..........................
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Above 90º F.................SAE 30 Not Lower than 32º F...SAE 20 or 30 As Low as +10º F........SAE 20 W As Low as -10º F.........SAE 10 W To temperatures below -10º F, use SAE 10 W plus 10% kerosene Valve and Ignition Timing Piston Measurements From Top Centre Inlet opens 9 degrees before top centre .039" (9.91 mm.) Inlet closes 50 degrees after bottom centre 3.772" (95.81 mm.) Exhaust opens 47 degrees before bottom centre 3.799" (96.49 mm.) Exhaust closes 12 degrees after top centre
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CJ2A Operation and Care Manual -- Inspections and Precautions At assembly a restrictor is placed between the intake manifold and the carburetor to limit the road speed to approximately 42 mph. To protect the vehicle, leave the restrictor in position for the first 500 miles of road operation, or equivalent in industrial operation, after which remove and discard it. It is an obligation of the Selling Dealer to carefully inspect and adjust your Universal Jeep before delivery. After your vehicle
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CJ2A Operation and Care Manual -- Getting Started 1. Windshield Wiper Arm 19. Underdrive Shift Lever 2. Windshield Wiper Blade 20. Front Axle Drive Shift Lever 3. Windshield Centre Lock 21. Transmission Shift Lever 4. Windshield Glass 22. Heat Indicator Gsuge 5. Hand Wiper Handle and Knob 23. Accelerator Pedal 6. Windshield Tubular Frame 24. Speedometer 7. Windshield Frame and Glass Assembly 25. Brake Pedal 8. Windshield Inner Adjusting Arm 26. Clutch Pedal 9. Windshield Outer Adjusting
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FIG. 2 -- SIDE SECTIONAL VIEW OF ENGINE 1. Fan Assembly 14. Exhaust Manifold Assembly 26. Connecting Rod Cap Bolt 39. Crankshaft Oil Seal 2. Water Pump Bearing and Shaft 15. Valve Spring 27. Oil Float Support 40. Starting Crank Nut Assembly Assembly 16. Valve Tappet Self-Locking 28. Oil Float Assembly 41. Crankshaft Gear Key 3. Water Pump Seal Washer Adjusting Screw 29. Crankshaft Bearing Centre -- 42. Fan and Governor Drive Pulley 4. Water Pump Seal Assembly 17. Engine Plate -- Rear Low
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• Shift the lever into the reverse position, slowly release the clutch pedal and regulate the car speed with the foot accelerator. TO USE THE ENGINE AS A BRAKE. The most effective brake for holding the vehicle back on a steep grade is the engine. To use the engine as a brake, shift into one of the lower speeds before starting to descend. Keep the clutch engaged, the throttle closed, and the ignition “ON”. Low gear will hold any vehicle effectively on any hill it can climb. Never engage the
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STEERING KNUCKLE OIL SEAL. When parking during cold, wet weather, swing the front wheels from right to left to wipe away moisture adhering to the front axle universal joint housings and oil seals, Fig. 5. This will prevent freezing with resulting damage to the oil seal felts. When the vehicle is stored for any period, the front axle universal joint housings should be coated with light grease to prevent rusting. How to Save Gasoline 1. In cold weather economical starting of the engine is ea
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CJ2A Operation and Care Manual -- General Lubrication General Lubrication The use of high grade lubricants and regular application is specially essential when operating the “Jeep” because of the diversified service it performs. The amount of trouble free service received will be in proportion to the care given. Lubricate the vehicle in accordance with the type of service performed. The following pages should be referred to for instructions covering grade and quality of lubricant for all parts
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of industrial or field use. Drain the filter at each oil change to prevent the old oil contained in the filter from mixing with and contaminating the new oil. Replace the element at each 8000 miles of highway use or 200 hours of industrial or field use. AIR CLEANER. Care of the air cleaner is EXTREMELY IMPORTANT – especially when the vehicle is used under dusty conditions. Clean and refill the air cleaner reservoir to the level mark, with oil of the same grade used in the engine, at etch eng
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CJ2A Operation and Care Manual -- Proper Maintenance NEVER RUN ENGINE IN CLOSED GARAGE Due to the presence of carbon monoxide (a poisonous gas in the exhaust of the engine) never rub the engine for any length of time while the vehicle is in a small closed garage. Opening the doors and windows will lessen the danger considerably, but it is safest if adjustments are being made that require the operation of the engine, to run the vehicle out-of-doors. INSPECTION. The old adage "An ounce of prev
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1. Condenser The breaker points should be cleaned and adjusted to .020" 2. Lubricating Wick (0.51 mm.) opening. Remove all of the spark plugs except 3. Breaker Arm No. 1. Rotate the crankshaft until No. 1 piston is coming Pivot up on the compression stroke which can be determined by 4. Breaker Cam the resistance in the cylinder. Remove the spark plug and 5. Distributor Points continue to turn the engine slowly until the mark "IGN" on the flywheel is in the centre of the timing hole at the
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CJ2A Operation and Care Manual -- Proper Maintenance (part 2 -- Engine Fails to Start, Oil System) ENGINE FAILS TO START Should the engine suddenly stop or fail to start, check the cause as follows. Also see Emergency Chart. • Make sure there is gasoline getting to the carburetor (Note: Should the trouble be traced to the gasoline supply see FUEL SYSTEM) and that the ignition switch is “ON”. • Check ignition circuit wiring connections to be sure they are tight and clean. • Check that the
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ENGINE MOUNTINGS The rubber engine mountings, which are attached to the frame side rail brackets and to the support plate, prevent fore-and-aft motion of the engine, yet allow free sidewise and vertical oscillation which neutralizes vibration at the source. Keep the mountings tight. A loose engine may cause vibration, clutch chatter or high fuel level in the carburetor. The rubber surface of the mountings partially insulates the engine from the frame. To assure a positive electrical conne
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FLOATING OIL INTAKE The floating oil intake (No. 28, Fig. 2) is attached to the crankcase with two screws. The construction of the float and screen cause it to remain on top of the oil, preventing the circulation of water and dirt. Once each year remove the float, screen and tube and clean thoroughly with a suitable cleaning fluid. When replacing, place some sealer on the gasket where the tube bears against the engine crankcase. A leak at this point will allow air to enter the oil sucti
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CJ2A Operation and Care Manual -- Proper Maintenance (part 3 -- Engine Electricals, Fuel and Cooling Systems.) GENERATOR The generator is a 35-ampere, two-brush unit which does not require adjustment to increase or decrease output. This is accomplished by the regulator which limits the current generated to that which is required by the battery. The generator charging rate, as shown by the ammeter, will be low when the battery is well charged and correspondingly higher as charging is requir
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FUEL SYSTEM The fuel system consists of the fuel tank lines, fuel pump, carburetor and air cleaner. The most important maintenance attention is to keep the system clean and free of water, also periodically inspect for leaks. Should the vehicle be stored for an extended period, the fuel system should be completely drained and the engine started and allowed to run until the carburetor is emptied. This will avoid oxidation of the fuel, resulting in the formation of gum in the units of the sy
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camshaft, Fig. 13. The pump draws gasoline from the fuel tank, through a filtering screen mounted in the pump sediment chamber and forces it to the carburetor. The pump pressure is 4 ½ lbs. at 16” above the outlet at 1800 rpm. Engine speed. The sediment chamber can be removed by backing off the thumbscrew nut sufficiently to permit swinging the wire clamp to one side. The bowl or cover should be washed and wiped dry and the screen dried and then cleaned with a stiff brush. When reassembling
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WATER PUMP The water pump assembly Fig. 15 is a centrifugal impeller type, of large capacity to circulate the water in the entire cooling system. The sealed type double-row ball bearing is integral with the shaft and is packed at the time of assembly with a special high melting point grease, so requires no lubrication. FAN BELT The fan and generator are driven by a “V”-type belt. The drive is on the sides of the belt, therefore it is not necessary to adjust it tight, which might cause exc
