Cylinder Block - Inspect; Cylinder Head - Inspect; Piston Height - Inspect - Perkins 1104D NH1 Systems Operation Testing And Adjusting

72
Testing and Adjusting Section

Cylinder Block - Inspect

1. Clean all of the coolant passages and the oil
passages.
2. Check the cylinder block for cracks and damage.
3. The top deck of the cylinder block must not be
machined. This will affect the depth of the cylinder
liner flange and the piston height above the
cylinder block.
4. Check the front camshaft bearing for wear. Refer
to Specifications, "Camshaft Bearings" for the
correct specification of the camshaft bearing. If a
new bearing is needed, use a suitable adapter to
press the bearing out of the bore. Ensure that the
oil hole in the new bearing faces the front of the
block. The oil hole in the bearing must be aligned
with the oil hole in the cylinder block. The bearing
must be aligned with the face of the recess.

Cylinder Head - Inspect

1. Remove the cylinder head from the engine.
2. Remove the water temperature regulator housing.
3. Inspect the cylinder head for signs of gas or
coolant leakage.
4. Remove the valve springs and valves.
5. Clean the bottom face of the cylinder head
thoroughly. Clean the coolant passages and
the lubricating oil passages. Make sure that the
contact surfaces of the cylinder head and the
cylinder block are clean, smooth and flat.
6. Inspect the bottom face of the cylinder head for
pitting, corrosion, and cracks. Inspect the area
around the valve seat inserts and the holes for the
fuel injection nozzles carefully.
7. Test the cylinder head for leaks at a pressure of
200 kPa (29 psi).
i02399735
Illustration 68
Flatness of the cylinder head (typical example)
(A) Side to side
(B) End to end
i02560426
(C) Diagonal
8. Measure the cylinder head for flatness. Use a
straight edge and a feeler gauge to check the
cylinder head for flatness.
•
Measure the cylinder head from one side to the
opposite side (A).
•
Measure the cylinder head from one end to the
opposite end (B).
•
Measure the cylinder head from one corner to
the opposite corner (C).
Refer to Specifications, "Cylinder Head" for the
requirements of flatness.

Piston Height - Inspect

Table 10
Part
Number
21825617
21825496
RENR7967
Required Tools
Part Description
Dial gauge
Dial gauge holder
g01254471
i01889496
Qty
1
1