Perkins 4.108 Workshop Manual page 15

Gudgeon Pin 4.108
Type
Outside Dia. of Gudgeon Pin
Length of Gudgeon Pin
Fit in Piston Boss
Gudgeon Pin 4.107 and 4.99
Type
Outside Dia. of Gudgeon Pin (Later Engines)
Outside Dia. of Gudgeon Pin (Earlier Engines)
Fit in Piston Boss
Small End Bush 4.108
Type
Length of Small End Bush
Outside Dia. of Small End Bush
Inside Dia. before Reaming
Inside Dia. after Reaming
Clearance between Small End Bush and Gudgeon Pin
Small End Bush 4.107 and 4.99
Type
Length of Small End Bush
Outside Dia. of Small End Bush
on later 4.99 and all 4.107 engines
Early 4.99 engines
Inside Dia. after Reaming on later
4.99 and a/l 4.107 engines
Early 4.99 engines
Clearance between Small End Bush and Gudgeon Pin
TECHNICAL DATA-B.S
Fully Floating
1.0625/1.0627 in (26,987/26,993 mm)
2,673/2,687 in (67,894/68,250 mm)
Transition
Fully Floating
0.9375 in/0.9377 in (23,812/23,817 mm)
0.875/0.8752 in (22,225/22,23 mm)
Transition
Steel Backed, Lead Bronze Lined
0.935/0.955 in (23,749/24,257 mm)
1.221/1.222 in (31,013/31,039 mm)
1.0495/1.0545 in (26,657/26,784 mm)
1.06315/1.0632 in (27,004/27,005 mm)
0.00045/0.0007 in (0,0114/0,0178 mm)
Steel Backed, Lead Bronze Lined
0.865/0.885 in (22,00/22,48 mm)
1.06511.066 in (27,05/27,08 mm)
1.0025/1.0035 in (25,46125,49 mm)
0.9382/0.93875 in (23,83/23,84 mm)
0.8757/0.87625 in (22,24/22,26 mm)
0.0005/0.00125 in (0,0110,03 mm)
Note. Bushes to be reamed to suit respective Gudgeon Pins, and are provided with a reaming allowance.
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Rod 4.108
Type 'H' Section
Cap Location to Connecting Rod
Big End Parent Bore Dia.
Small End Parent Bore Dia.
Length from Centre Line of Big End
to Centre Line of Small End
Big End Setscrew
Connecting Rod End Float
Connecting Rod 4.107 and 4.99
Type
Cap Location to Connecting Rod
Big End Parent Bore Dia.
Small End Parent Bore Dia.
on later 4.99 and all 4.107 engines
Early 4.99 engines
Length from Centre Line of Big End to Centre Line of
Small End
Big End Setscrew
Connecting Rod End Float
on later 4.99 and all 4.107 engines
Early 4.99 engines
Serrations, Offset 45 to the Horizontal
2.146/2.1465 in (54,508/54,521 mm)
1.21875/1.21975 in (30,956/30,981 mm)
6.217/6.219 in (157,912/157,963 mm)
0.375 in (i in) U.N.F.
0.006510.0105 in (0,165/0,267 mm)
'H' Section
Serrations, Offset 45' to the Horizontal
2. i 46/2.1465 in (54,508/54,521 mm)
1.0625/1.0635 in (26,99/27,01 mm)
1.00/1.001 in (25,4/25,43mm)
6.405/6.407 in (162,69/162,74 mm)
0.375 in (i in) U.N.F.
0.0065/0.0105 in (0,1610,27 mm)
0.0075/0.0105 in (0,19/0,27 mm)