Service bulletin ENP-729
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10176392 |
| Published by NHTSA | 2020-06-15 |
| Manufacturer's number | ENP-729 |
| Manufacturer's date | 2020-05-27 |
| NHTSA component | FUEL SYSTEM, GASOLINE; EQUIPMENT |
NHTSA's summary
Agility Fuel Solutions LLC (?Agility®?) defueling procedure prepared for Gillig buses equipped with Type 4 fuel cylinders and electric solenoid cylinder valves and Maniflter fuel management modules (FMMs). On compressed natural gas (CNG) cylinders equipped with electric solenoid cylinder valves, verification that cylinder pressure is fully exhausted is required before any removal, replacement, tightening or loosening is performed on any valve, pressure transducer, PRD, tubing or fitting connected to the cylinders. This verification is required to confirm the electric solenoid cylinder valves opened properly during the defueling process and allowed the cylinder to be depressurized and defueled. This procedure describes two methods to defuel the cylinders, lines, and valves. Both methods include a procedure to verify the electric solenoid cylinder valves opened properly during defueling and that the cylinder pressures are fully exhausted. Either method can be used. 1.How to remove the solenoid valve components and then fully exhaust the pressure in the cylinder if the solenoid valve did not open properly when energized during defueling. 2.How to defuel the CNG system and cylinders if no battery power is available. ENP-729 is an update of ENP-164 REV H to reflect changes in FMM design and a transition to Type 4 fuel cylinders.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Equipment and accessories, Fuel system
| AGILITY FUEL SYSTEMS CNG FUEL SYSTEM |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.