4.5 Transfer Pump, End Plate Assembly, Stop Solenoid, High Pressure Outlets


4.5.1 Transfer pump

4.5.2 End plate

A) Assembly of transfer pressure regulator

Confirm that the rollpin (13) is inserted in the correct hole for the direction of rotation of the pump, as indicated on the outside of the end plate housing ( "A" or "C"). Insert the priming spring (11) into the bottom of the end plate housing (12), ensuring that the spring remains correctly positioned and does not turn over as it is dropped in place. Fit a new seal (9) to the sleeve (8) and insert the regulating piston (10) into the sleeve. Place the sleeve, with the priming port lowest, into the end plate.

Place the filter (3), with its flange uppermost, into the end plate and push it gently but firmly down until it is properly seated on the sleeve. Take care not to damage the filter mesh. Fit the regulating spring (7) and then the spring peg (6) (if specified).

Some spring pegs are retained within the spring as an assembly.

Place the adjuster (5), with the screw socket uppermost, into the sleeve, followed by the retaining spring (4). Fit a new O-ring (2) or sealing washer to the fuel inlet connection (1), screw the connection into the end plate and leave it finger tight.

B) Sandwich plate

Fit the sandwich plate (1), if specified, placing the

locating slot so that it matches the position of the

rollpin (2) in the end plate.

If the original sandwich plate shows any signs of scoring, do not reverse it as this will cause leaks and affect the efficiency of the transfer pump. It must be replaced.

C) Fitting the support bracket and end plate to the hydraulic head

(If specified, fit the pump-to-engine support bracket in the position noted during dismantling and tighten the screws to their specified torque).

Position the end plate assembly on the hydraulic head, with the fuel inlet connection uppermost.

Locate the slot in the transfer pump liner with the end plate rollpin, and secure the end plate with the four screws (1), tightened progressively and diagonally to the specified torque. Tighten the fuel inlet connection to its specified torque.

Check that the drive shaft rotates freely.

D) Transfer pressure relief valve

If a pressure relief valve is specified, fit a new small O-ring (1) and then use the specified protection sleeve to fit a new large O-ring (2). Fit the valve (3) to the end plate and tighten it to the specified torque.

Check that the drive shaft rotates freely.

4.5.3 Stop solenoid or blanking plug

Fit the washer (5) and nut (6), or screw, washer and connector to the terminal (if specified). Fit a new Oring (3) to the solenoid body (4). Place the plunger return spring (2) into the solenoid, followed by the plunger (1), with the nitrile rubber end outwards.

Screw the assembly into the hydraulic head and leave it finger tight.

If a blanking plug (7) is specified, fit a new O-ring to it and screw it into the hydraulic head, leaving it finger-tight.

The solenoid (or plug) will be removed for fitment of a pressure gauge during testing.

4.5.4 High pressure outlets

A) Radial outlet connections (with delivery valves)

Fit a new lower seal (5) into the banjo (3). Place the delivery valve body (6) into the banjo, followed by valve (7), upper seal (8), spring (9) and spring peg (10). Screw delivery valve holder (11) into the banjo, finger tight. Place the banjo assembly in a softjawed vice (not across the sealing surfaces, and taking care to use the minimum necessary force).

Tighten the holder to the specified torque. Do not tighten holders when they are fitted to the pump.

Use new seals (2) and (4) and fit each assembled outlet to the hydraulic head. Leave the banjo bolts (1) finger tight. Fit the outlet connection clamping plate (12) and nuts (13), finger-tight, then refer to the tightening procedure in (B) below.

B) Radial outlet connections (without delivery valves)

The example shown is fitted with pressurising valves. These are factory-assembled items.

Fit new seals (2) and (4) to each banjo bolt (1) and fit the outlet (3) to the hydraulic head with the boss on the outlet facing the head as shown. Leave the banjo bolts finger-tight. Fit the outlet connection clamping plate (5) and nuts (6), also finger-tight, then follow the tightening procedure:

  1. Tighten the banjo bolts to their specified torque.
  2. Tighten the clamping nuts to their specified torque.
  3. Re-apply the specified torque to the banjo bolts. (Do not slacken the bolts before applying the torque).

C) Axial outlet connections

Reposition the Hydraclamp to place the pump vertically, with the end plate uppermost. Axial outlet connections may be fitted either with pressurising valves (a), which are factory-sealed units, or delivery valves (b)

A. Fit a new sealing washer (1) into each high pressure outlet bore in the hydraulic head, fit the pressurising valves and leave them finger tight.

B. Into each outlet fit a new lower washer (1), delivery valve body (2), valve (3), upper seal (4), spring (5), spring peg (6) and collar (7) if specified. Fit the holder (8) and leave it finger tight.

Tighten the connections to their specified torque, then slacken them and reapply the torque.

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