A special service version of the tamper evident body (D) must be fitted when a new fuel screw is fitted. A kit

part number U5MK0619 is available from PDC. This kit will be supplied only to permitted personnel and must

not be supplied to end users. A groove (D4) around the circumference of the tamper evident body is used to

identify it as a service part.

2  Fit the fuel adjustment screw assembly (C3) to the engine ensuring that there is a metal snap ring (C1)

located in the lock nut groove and a o-ring (C2) fitted.

3  On a suitable calibrated test facility, reset the engine performance parameters to the certified specification

indicated on the engine's emissions control information label mounted on the timing case.

4  Having set the full load fuel delivery to the certified specification and ensuring the lock nut is correctly

tightened, insert the D-plug (D2) into the service tamper resistant body (D3) at the opposite end of the internal

groove (D1). Fit the new service tamper resistant body assembly (D) over the fuel adjustment screw.

5  Tap on the tube until the internal groove (D1) in the body engages over the metal snap ring (C1) in the lock

nut.

To remove and re-fit the tamper evident maximum engine speed cap

The maximum speed adjustment has a plastic cap (B4) fitted by Perkins. The length of this fitted cap will be

either 22mm or 30mm in length depending on the original protrusion of the maximum speed adjustment screw

(B5). The cap is pressed by hand onto the adjustment screw and an internal lip locates into a groove on the

lock nut.

1  Remove the plastic cap (B4) from the maximum speed bolt (B5) with a suitable lever, taking care not to

damage the seal between the cylinder block and the locknut.

2  Make the necessary adjustment to maximum (no load) engine speed by rotating bolt clockwise to reduce

speed and anti-clockwise to increase speed with the engine throttle lever fully open.

Note:   The only permitted adjustment to the maximum engine speed is to correct the speed in accordance with

the high idle speed shown on the emissions compliance label mounted on the engine timing case.

3  After adjustment to within the certified maximum speed range, a new service cap of the appropriate length

can be obtained from PDC Irlam. The replacement service cap will be red in colour part number 131276440 -

30mm length or 131276450 - 22 mm length. This cap will be supplied only to permitted personnel and must

not be supplied to end users.

4  Hand press the replacement service cap onto maximum speed bolt (C4) lock nut.

A warranty claim will not be accepted if it can be seen that an adjustment to the maximum engine speed setting

(B5) or the fuel adjustment screw (B2) has been made by personnel not approved by Perkins.

1

2

3

4

1

3

2

4

c

C

D

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Workshop Manual, TPD 1377E, issue 4

This document has been printed from SPI². Not for Resale

6

100 Series

Idler gear and oil pump

To remove and to fit

Operation 6-10

Special requirements

Clearance (B1) mm (in)

Standard

Service limit

0,01 - 0,15 (0.0004 - 0.0060)

0,25 (0.0098) max

Extra shims may be required to achieve the standard clearance. To check the end float refer to Operation 6-13.

1

Workshop Manual, TPD 1377E, issue 4

75

This document has been printed from SPI². Not for Resale

6

100 Series

Idler hub

To fit

Operation 6-11

Special requirements

Special tools

Description

Part number

21825624

Idler hub assembly tool - 102-05, 103-07

Idler hub assembly tool - 103-10

21825625

Idler hub assembly tool - 103-13, 103-15,

104-19, 104-22

21825626

Caution:  If the idler hub is removed, it must be renewed.

76

Workshop Manual, TPD 1377E, issue 4

This document has been printed from SPI². Not for Resale

6

100 Series

Gear teeth backlash

To check backlash

Operation 6-12

Special requirements

Timing gear tolerances mm (in)

Standard

Service limit

0,08 (0.0032)

0,25 (0.0098)

1  Align the set marks.

2  Measure the clearance with a feeler gauge.

Workshop Manual, TPD 1377E, issue 4

77

This document has been printed from SPI². Not for Resale