约翰迪尔柴油发动机的燃油泵拆卸和安装双轨John Deere燃油泵的方法与技术

约翰迪尔柴油发动机的燃油泵拆卸和安装双轨John Deere燃油泵的方法与技术.

Remove and Install Dual Rail Fuel Supply Pump
A—Fuel Supply Pump B—Mounting Bracket C—Tee Fitting D—Straight Fitting
IMPORTANT:  Plug or cap all fuel system
connections and passages as lines or components are removed to keep debris out using JDG998 Fuel System Cap Plug Kit
Remove Fuel Manifold
NOTE: Label fuel lines as they are disconnected to ensure correct reassembly.
1. Remove three fuel lines connected to fuel supply pump (A). Cap all lines and fittings to keep debris out of fuel system.
2. Remove four cap screws securing supply pump to mounting bracket (B) and remove pump. Remove and discard O-ring.
NOTE: Fuel supply pump is not serviceable; replace pump if determined to be defective.
3. Remove tee fitting (C) and straight fitting (D) from pump and clean thoroughly if pump is to be replaced.
Install Fuel Supply Pump

1. Install tee fitting and straight fitting onto new pump (using new O-rings) in same orientation as on original pump. Tighten fittings securely.
2. Ensure that drive coupler set screw is tightened to specifications on supply pump drive shaft with end of shaft flush with coupler ID. Check drive coupler on camshaft drive pin also; adjust as needed.
Specification
Fuel Supply Pump and Camshaft Drive Coupler Set
Screws—Torque ...........................................................  4 N•m (3 lb-ft)
3. Position new rubber spider (vibration absorber) on drive coupler. Position new O-ring on face of supply pump.
4. If removed, apply AR54749 Soap Lubricant to new O-ring on supply pump mounting bracket (B) and install. Tighten mounting bracket cap screws to specifications.
Specification IMPORTANT:  Before connecting ORFS fuel line Fuel Supply Pump Mounting  fittings, be sure O-ring is correctly Bracket Cap Screws—Torque ..................................  50 N•m (37 lb-ft)  positioned in the groove of fitting.
5. Install fuel supply pump with rubber spider properly Tighten fitting ONLY to specified
meshed with coupler on rear of camshaft. torque. DO NOT OVERTIGHTEN.
6. Install four cap screws and tighten to specifications. 7.  Install three fuel lines and tighten to specifications.
Specification
Specification Fuel Line ORFS Fittings—
Fuel Supply Pump-to-Bracket— Torque.......................................................................  24 N•m (18 lb-ft)
Torque.......................................................................  25 N•m (18 lb-ft)