Tag Archives for Unloader

EL-740 Air Compressor Unloader Reassembly

1. Lubricate the bores in the unloader body with Dow-Corning #33 Lubricant. 2. Insert new expander springs into new diaphragm cups. Place the diaphragm cups into the bores of the unloader body with the expander springs facing the inside of … Continue reading

04. August 2017 by sam
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EL-740 Air Compressor Unloader Inspection

1. Examine the unloader body and bores for cracks, damaged threads, nicks or scratches. Replace as needed. 2. Check the unloader pins for damage. Measure the length of the pins. Pin bores must be within the limits stated in the … Continue reading

04. August 2017 by sam
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EL-740 Air Compressor Unloader Disassembly

Unloader (1) Unloader body. (2) Expander spring. (3) Diaphragm. (4) Valve disc. (5) Retainer ring. (6) Bushing. (7) Unloader pin spring. (8) Unloader pin. 1. Remove bushings (6). (Some style unloader assemblies will have snap rings holding the bushings in … Continue reading

04. August 2017 by sam
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EL-740 Air Compressor Unloader Removal

1. Reduce the air pressure in the reservoir to below 551 kPa (80 psi). 2. Remove the line from unloader to governor. 3. Remove two hex-headed bolts and lift the unloader assembly off the air compressor. 4. The unloader pins … Continue reading

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