Perkins 4.99 - Crankshaft and Bearing Specifications; Connecting Rod Alignment and Crankshaft Dimensions; Main Bearings and Thrust Washers

TECHNICAL DATA-B.G
Connecting Road Alignment 4.108,4.107,4.99
Large and small end bores must be square and parallel with each other within the limits of ::'::0.010 in (0,25 mm) mea-
sured 5 in (127 mm) each side of the axis of the rod on test mandrel as shown in Fig. B.1. With the small end bush
fitted, the limit of ::'::0.010 in (0,25 mm) is reduced to ::'::0.0025 in (0,60 mm).
-
--
Ej~
.= E
= -.::t
Sin
.-It')
-
..
=N
-
~
00
127mm
+1 +.
...J
"
B1
Crankshaft 4.108,4.107,4.99
Overall Length
Main Journal Dia. Nos. 1 and 2
Main Journal Dia. No.3
Main Journal Length No.
Main Journal Length No.2
Main Journal Length NO.3
Main Journal Fillet Radii
Crankpin Dia.
Crankpin Length
Crankpin Fillet Radii
Surface Finish-All Journals
Main Journal and Crankpin Regrind Undersizes
Oil Seal Helix Dia.
Oil Seal Helix
Width
Oil Seal Helix Depth
Flange Dia.
Flange Width
Spigot Bearing Recess Depth
Spigot Bearing Recess Bore
Crankshaft End Float
Crankshaft Thrust Washers 4.108, 4.1
Type
Position in Engine
Thrust Washer Thickness (STD)
Thrust Washer Thickness (O/S)
Thrust Washer Outside Dia.
Thrust Washer Inside Dia.
Main Bearings 4.108, 4.101, 4.99
Type
Shell Width
Outside Dia. of Main Bearing
Inside Dia. of Main Bearing
Running Clearance-Nos. 1 and 2 .
Running Clearance-No. 3
Steel
Thickness
Aluminium Thickness
,;
i..-
4.99
....
~
-
c: E
I
.- E
Sin
=-.::t
--
-
'-It')
-
..
C?N
127mm
=0
+1+.
t-.
...J
'f
-
:..,...
21.125 in (536,575 mm)
2.248/2.2485 in (57,099/57,112 mm)
2.2475/2.248 in (57,086/57,099 mm)
1.40625 in (35,719 mm)
1.496/1.504 in (37,998/38,202 mm)
1.499/1.502 in (38.075/38,151 mm)
0.12510.141 in (3,175/3,581 mm)
1.9993/2.0001 in (50,78/50,80 mm)
1.1875/1.1895 in (30.162/30,213 mm)
0.15625/0.17187 in (5/32/11/64 in)
(3,969/4,366 mm)
8-16 micro-in (0,2 - 0,4 micron)
0.010.0.020,0.030 in (0,25, 0.51.0.76 mm)
2.21075/2.21175 in (56,153/56.178 mm)
0.050/0.080 in (1,270/2,032 mm)
0.004/0.008 in (0,102/0.203 mm)
3.9985/3.9995 in (101,562/101,587 mm)
0.500 in (12,700 mm)
0.875 in (22,225 mm)
1.250 in (31,750 mm)
0.002/0.015 in (0.0508/0.381 mm)
Steel BaCked-Lead Bronze Faced
Rear Main Bearing
0.089/0.091 in (2,261/2,311 mm)
0.0965/0.1005 in (2,451/2,553 mm)
3.24513.255 in (82,423/82.677 mm)
2.590/2.600 in (65.786/66,040 mm)
Pre-finished, Steel Backed. Aluminium Tin Lined
1.245/1.255 in (31.623/31.877 mm)
2.3955 in (60,846 mm)
2.2505/2.2515 in (57,163/57,188 mm)
0.002/0.0035 in (0.051/0,089 mm)
0.0025/0.004 in (0,063/0.102 mm)
0.060 in (1,524 mm) Max.
0.01210.01225 in (0.305/0,311 mm)