Disassembly and assembly

90 KENR6226-01
Disassembly and Assembly Section
4. Align the holes in the crankshaft assembly for
bolts (2) with t
he holes in the cylinder block. Align
the holes in the crankshaft assembly for allen
head screws (1) with the holes in the cylinder
block. Carefu
lly lower the crankshaft assembly (4)
into the cylinder block. If necessary, gently tap the
rear of the crankshaft with a soft faced hammer.
5. Remove lifting device (3) from crankshaft
assembly (4).
6. Install allen head screws (1) finger tight.
7. Install bolt
s(2).
For 402D-05, 403D-07, 403D-11 and 404D-15
engines, tig
hten bolts (2) to a torque of 27 N·m
(20 lb ft).
For 403D-15,
403D-15T, 403D-17, 404D-22,
404D-22T and 404D-22TA engines, tighten bolts
(4)toatorqueof52N·m(38lbft).
8. Tighten allen head screws (1) to a torque of
27 N·m (20 lb ft).
9. Rotate the crankshaft in order to ensure that there
is no binding.
10. Check the crankshaft end play. Push the
crankshaft toward the front of the engine. Install
Too li ng (A
) to the cylinder block and the rear face
of the crankshaft. Push the crankshaft toward the
rear of the engine. Use Tooling (A) to measure
the cranks
haft end play. Refer to Specifications,
“Crankshaft” for the maximum permissible
crankshaft end play.
End By:
a. Install t
he pistons and the connecting rods. Refer
to Disassembly and Assembly, “Pistons and
Connecting Rods - Install”.
b. Install the engine oil pump and the suction pipe.
Refer to Disassembly and Assembly, “Engine Oil
Pump - Ins
tall”.
c. Install the crankshaft rear seal. Refer to
Disassem
bly and Assembly, “Crankshaft Rear
Seal - Remove and Install”.
d. Install
the engine oil relief valve. Refer to
Disassembly and Assembly, “Engine Oil Relief
Valve - Remove and Install”.
i02748526
Bearing Clearanc e - Check
Measurement Pr
ocedure
Table 30
Required Tools
Tool
Part
Number Part Description Qty
-
Plastic G auge (Green)
0.025 to 0.076 mm
(0.001 to 0.003 inch)
1
-
Plastic Gauge (Red)
0.051 to 0.152 mm
(0.002 to 0.006 inch)
1
-
Plastic Gauge (Blue)
0.102 to 0.229 mm
(0.004 to 0.009 inch)
1
A
-
Plastic Gauge (Yellow)
0.230to0.5
10 mm
(0.009 to 0.020 inch)
1
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
component life.
Note: Perkins does not recommend the checking of
the actual c
learances of the bearing shells particularly
on small engines. This is because of the possibility
of obtaining inaccurate results and of damaging the
bearing she
ll or the journal surfaces. Each Perkins
bearing shell is quality checked for specificwall
thickness.
Note: The measurements should be within
specifications and the correct bearings should
be used. If
the crankshaft journals and the bores
for the block and the rods were measured during
disassembly, no further checks are necessary.
However, i
f the technician still wants to measure the
bearing clearances, Tooling (A) is an acceptable
method. Tooling (A) is less accurate on journals with
small dia
meters if clearances are less than 0.10 mm
(0.004 inch).
NOTICE
Lead wire
, shim stock or a dial bore gauge can dam-
age the bearing surfaces.
The techn
ician must be very careful to use Tooling (A)
correctly. The following points must be remembered:
This document has been printed from SPI². Not for Resale