Deere柴油发动机大修后怎么样燃油系统排放空气约翰迪尔6081发动机皮带张紧轮

Deere柴油发动机大修后怎么样燃油系统排放空气约翰迪尔6081发动机皮带张紧轮，

为约翰迪尔双轨燃油系统放气

无论何时打开燃油系统进行维修（管路断开或滤清器拆下），都必须排出系统中的空气。

1、打开排水阀（A），排出清水分离器沉淀杯（C）中的水和污染物，然后操作手动底漆（B），直到沉淀杯中没有水和碎屑。

2、松开燃油细滤器（最终）出口管路（a）或取下盖子并打开空气净化阀（D）（如有配备）。

3、在约翰迪尔粗滤器上泵送手动底漆（B），直到连接处流出稳定的燃油流（无气泡）。

继续泵送手动底漆，同时将出口管路连接拧紧至24 N•m（18 lb ft）。不要过度拧紧。

5、起动发动机并在高怠速下运转3-5分钟。

注意：如果更换了两个滤清器，手动注油将排出细滤器中的空气，然后排出干净的燃油，然后排出粗滤器中的空气。如果未能从两个滤清器中排出空气，将导致约翰迪尔发动机因系统中截留的空气而熄火

排水分离器

Bleed Dual Rail Fuel System
Whenever the fuel system has been opened up for service (lines disconnected or filters removed), it will be necessary to bleed air from the system.
1. Drain water and contaminants from clear water separator sediment bowl (C) by opening drain valve (A), then operate hand primer (B) until bowl is clear of water and debris.
2. Loosen secondary (final) fuel filter outlet line (a) or remove cap and open air purge valve (D), (if equipped).
3. Pump hand primer (B) on primary filter until a steady flow of fuel (without bubbles) comes out of  connection.
4. Continue pumping hand primer and simultaneously tighten outlet line connection to 24 N•m (18 lb-ft). DO NOT overtighten.
5. Start engine and run at high idle for 3–5  minutes.
NOTE: If both filters were replaced, hand priming will purge air form the secondary filter followed by clean fuel, followed by air from the primary filter. Failure to bleed air from both filters will cause the engine to die due to air trapped in the  system
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Check Single Rail Fuel Supply Pressure
1. Connect a 0-1000 kPa (0-150 psi) gauge to the Diagnostic Quick-connect on the air purge valve after removing the dust cap and cleaning the
quick-disconnect.
2. Open bleed valve
3. Start/crank engine. Fuel transfer pump should maintain minimum pressure shown in specification.
Specification Checking Fuel Supply Pressure
Fuel Transfer Pump Pressure—
Cranking (Minimum 200 RPM)....................  135–175 kPa (1.35–1.75 bar) A—Fuel Supply Pressure Quick Connect Port
(20–25 psi)
Normal (Idle)...........................................  410–555 kPa (4.1–5.5 bar) (60–
80 psi)
Rated Speed ..........................................  480–620 kPa (4.8–6.2 bar) (70–
90 psi)