Category Archives for EL-740

EL-740 Air Compressor Specifications

EL-740 Air Compressor Type – Two cylinder Rating – 7.4 cubic feet per minute Cylinder Head Components Exhaust valve seat top of valve seat to seating surface – 3.18 to 3.25 mm (.125 to .128 in) Exhaust Valve Cage: Overall … Continue reading

05. August 2017 by sam
Categories: EL-740 | 1 comment

EL-740 Air Compressor Troubleshooting

1. Air Compressor Fails To Maintain Sufficient Pressure Or Adequate Air. 2. Noisy Operation. 3. Air Compressor Passes Excessive Oil. 4. Air Compressor Not Unloading (excessive pressure). Troubleshooting Problems Problem 1: Air Compressor Fails To Maintain Sufficient Pressure Or Adequate … Continue reading

05. August 2017 by sam
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EL-740 Air Compressor Testing

Install a governor assembly to the air compressor, if one has not been installed previously. Connect an oil supply line having at least 138 kPa (20 psi) of oil pressure at the rear bearing cap. Provisions must be made for … Continue reading

05. August 2017 by sam
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EL-740 Air Compressor Installation Of Cylinder Head To Cylinder Block

1. Place new head to block gasket on cylinder block. 2. With cylinder head rotated to the proper position (to ensure proper porting); place the cylinder head onto the cylinder block. 3. If the governor bracket was mounted on the … Continue reading

05. August 2017 by sam
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EL-740 Air Compressor Assembly Of Cylinder Head

1. Place the cylinder head, bottom side up in a soft-jawed vise. 2. Insert the exhaust valve cages into the exhaust cavities. (Use new parts, if necessary. Refer to the “Specifications” section.) 3. Place new exhaust valve springs on the … Continue reading

05. August 2017 by sam
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EL-740 Air Compressor Assembly Of Cylinder Block To Crankcase

1. Position the crankcase so that the pistons are pointing up. On flange mounted air compressors it may be advisable to place the crankcase in a soft-jawed vise. 2. Lubricate the cylinder block bores, pistons, and piston rings with lubricating … Continue reading

05. August 2017 by sam
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EL-740 Air Compressor Assembly Of Piston And Connecting Rod To Crankshaft

1. Place the crankcase and crankshaft assembly on its side. 2. Remove the bearing cap and insert the assembly from the piston and connecting rod assembly. 3. Lubricate with engine oil the bearing inserts on the connecting rods and connecting … Continue reading

05. August 2017 by sam
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EL-740 Air Compressor Assembly Of Pistons And Connecting Rods

1. Lubricate the piston pin, piston pin bores and piston pin diameters in the connecting rod with engine oil. 2. Position the connecting rod in the piston and press the piston pin into place. 3. Install thrust buttons into the … Continue reading

05. August 2017 by sam
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EL-740 Air Compressor Crankshaft Bearing Installation

1. Press a new oil seal into the front bearing cap. Use a sealer on the outer rim of the oil seal. The spring side of the oil seal must face the crankcase when installed. The seal case should be … Continue reading

05. August 2017 by sam
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EL-740 Air Compressor Inspection – Crankcase

1. Examine the crankcase for cracks and damage to the gasket surfaces. Replace, if necessary. 2. Inspect the studs in the crankcase, if used. Replace any bent or damaged studs. 3. On bottom lubricated crankcases the oil passage must be … Continue reading

05. August 2017 by sam
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