Category Archives for EL-740

EL-740 Air Compressor Inspection – Crankshaft Bearing Caps

1. Examine front and rear bearing caps (base mount). Replace if cracked, or if the gasket surfaces have been defaced. 2. On air compressors with a sleeve-type rear bearing, check the inside diameter of the rear bearing. If the dimensional … Continue reading

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

EL-740 Air Compressor Inspection – Crankshaft And Bearings

1. A bent or twisted crankshaft cannot be repaired. If the connecting rod journals are scored beyond repair or worn beyond the limits in the “Specifications” section, replace with a new crankshaft or regrind the connecting rod journals. Service insert … Continue reading

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

EL-740 Air Compressor Inspection – Cylinder Block

1. Examine the cylinder block for cracks. Replace, if damaged. 2. Examine the cylinder bores for scratches, scoring and pitting. Check the cylinder bores for out-of-round or taper. If out-of-round more than 0.013 mm (.0005 in), or tapered more than … Continue reading

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

EL-740 Air Compressor Inspection – Pistons, Connecting Rods And Bearings

1. Examine the pistons for scoring, nicks, burrs, cracks, or other damage. Replace, as needed. 2. Measure the outside diameter of the piston at a 90 degree angle to the piston pin bore. Compare this measurement with the diameter of … Continue reading

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

EL-740 Air Compressor Inspection – Cylinder Head And Components

NOTE: If component part measurements are not within the “Specifications” limits, the parts must be replaced. 1. Examine the cylinder head for cracks and damaged threads. All gasket surfaces and inlet valve surfaces must be free of nicks and gouges. … Continue reading

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

EL-740 Air Compressor Cleaning, Inspection And Repairing

1. Wash all parts in cleaning solvent. Blow dry all parts with compressed air. 2. Clean the carbon deposits from the interior surfaces of the cylinder head. Clean all interior air and water passageways. 3. Remove the carbon from the … Continue reading

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

EL-740 Air Compressor Crankshaft Bearing Cap Removal

1. Remove the four bolts securing the bearing cap (flange mount) or caps (base mount) to the crankcase. 2. Tap the bearing caps lightly to loosen. Do not attempt to pry the bearing caps off. Remove the bearing caps from … Continue reading

04. August 2017 by sam
Categories: EL-740 | Tags: | Leave a comment

EL-740 Air Compressor Piston And Connecting Rod Disassembly

Piston Assembly (1) Compression rings. (2) Thrust button. (3) Piston rings. (4) Oil ring expander. (5) Oil ring. (6) Piston. (7) Connecting rod. 1. With a screwdriver remove the thrust buttons from the piston pins. On some EL-740 Air Compressors … Continue reading

04. August 2017 by sam
Categories: EL-740 | Tags: , | Leave a comment

EL-740 Air Compressor Piston And Connecting Rod Removal

1. Place the air compressor on its side. On flange mounted air compressors, remove the bottom cover plate. 2. Mark the connecting rods and connecting rod caps to ensure they are returned to the same connecting rod from which they … Continue reading

04. August 2017 by sam
Categories: EL-740 | Tags: , | Leave a comment

EL-740 Air Compressor Cylinder Block Removal

1. Remove the six nuts or cap screws and lock washers holding the cylinder block to the crankcase. 2. Tap the cylinder block lightly with a plastic or brass hammer to loosen, if necessary. 3. Pull the cylinder block off … Continue reading

04. August 2017 by sam
Categories: EL-740 | Tags: | Leave a comment

← Older posts

Newer posts →