Perkins New 1000 Series, Workshop Manual, Page: 113 / 290

Workshop Manual, TPD 1350, issue 3 113
15
New 1000 Series
Idler gear and hub
To remove and to fit 15-4
To remove
1 Remove the timing case cover , see operation 15-1 .
2 Rotate the crankshaft until the marked teeth of the
crankshaft gear and the camshaft gear and the fuel
pump gear are all aligned with the marked teeth of the
idler gear (A).
Note: The marked teeth of the idler gear will not
necessarily be in mesh with the marked teeth of the
other gears because of the different speed of rotation
of the idler gear.
3 Release the three setscrews (B8), remove the plate
(B1) of the idler gear and remove the gear (B3) from
the idler gear hub (B5). The drive gear of the fuel
injection pump may rotate counterclockwise when the
idler gear is removed.
4 Remove the idler gear hub, note the position of the
oil hole (B6).
Caution: The valve timing and fuel injection pump
timing will be lost if the crankshaft is rotated when the
idler gear is removed.
5 Inspect the gear and the bushes (B2) and (B7) for
wear and other damage and renew as necessary. The
gear and bushes are available as an assembly or
separate bushes are available.
6 If the bushes are to be changed, remove them with
a suitable puller. If a puller is not available, machine
off the face of one of the bushes and press them out.
Press in new bushes, machine the bores to get the
correct clearance on the hub and machine the faces
to get the correct end clearance, see the data and
dimensions and the end of this section.
7 For engines that use the idler gear assembly with
needle roller bearings - Release the three setscrews,
remove the plate of the idler gear (C1). Remove the
front thrust washer (C2), the front spacer (C3) and the
gear (C4). Remove the two needle roller bearings
(C5), if these are to be used again, they should be
fitted in their original positions. Remove the rear thrust
washer (C6) and the rear spacer (C7). Remove the
hub (C8).
A
A0129
4 1 2 3 6 5 7 8
C
A0132
8
1
2
5
3
4
6
7
L 00 30
B
Purchased from www.WorkshopManuals.co.uk