Fuel Feed Pump

CROSS SECTIONAL VIEW

FEED PUMP

Outlet Check Valve

Camshaft

Camshaft

Fuel Feed Pump

Outlet Check Valve

Inlet Check Valve

Inlet Check Valve

PRIMING PUMP

PRIMING PUMP

Fuel Feed Pump Parts
Fig. 6-35
Fig. 6-36

FEED PUMP TEST

1. Suction capacity test

The size of the suction pipes should be: Pipe inner diameter 8 mm (0.31 in.) Pipe length 2 m (78.7 in.)

(1) Operate the priming pump for one minute at 60 strokes per minute.

Suction capacity

Fuel must discharge within

25 strokes.

(2) Set the feed pump tester at 150 rpm and test the feed pump suction capacity.

Suction capacity

Fuel must discharge within

40 seconds.

2: Discharge performance test

Connect the pressure gauge to the feed pump discharge side.

(1) Operate the feed pump at 600 rpm.

Discharge pressure

(2) Operate the feed pump at 1,000 rpm. Measure discharge volume from the discharge side nozzle.

Discharge side nozzle diameter 1.54 mm (0.0606 in.) Discharge volume capacity More than 900 cc (54.9 cu.in.)/

min.

DISASSEMBLY

Disassemble in numerical order.

1. Inlet Hose

2. Outlet Hose

3. Feed Pump Assembly

4. Priming Pump

5. I nlet Check Valve & Spring

6. Outlet Check Valve & Spring

7. Snap Ring

8. Tappet

9. Piston Chamber Plug and Spring

10. Piston

11. Push Rod

Piston Type Feed Pump

11 10

11 10

Since the push rod is precisely fitted into the feed pump housing, do not remove the rod unless necessary. If removed, make sure to confirm assembly direction.

INSPECTION

Inspect the piston, push rod and feed pump housing for wear and damage.

Clearance STD (Reference) Piston 0.009 - 0.013 mm

Inspect the check valve and valve seat for wear.

Inspect the.tappet and roller for wear

Inspect the check valve and valve seat for wear.

Inspect the.tappet and roller for wear

Inspect the check valve and piston springs for damage.

Plug the priming pump inlet port strongly with a finger, and inspect if the pressure and vacuum are created when the pump is operated.

ASSEMBLY

Assemble in numerical order.

1. Push Rod

2. Piston

3. Piston Chamber and Spring

4. Tappet

5. Snap Ring

6. Outlet Valve & Spring

7. Inlet Check Valve & Spring

8. Priming Pump

9. Feed Pump Assembly

10. Outlet Hose

11. Inlet Hose

Dismantling Fuel Feed Pump Vehicle

Before assembling, clean the filter inside the union bolt.

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Responses

  • pinja
    How fuel feed pump is assembled?
    6 years ago
  • Jana
    How to dismantle the fuel feed pump?
    6 years ago

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