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1106 Perkins engine - Camshaft and Camshaft Gears (Remove and Install)
Camshaft
Remove the rockershaft and pushrods. Remove the front housing. The 1106
Perkins engine should be mounted on a suitable stand and placed in the
inverted position. Remove the thrust washer (1) from the cylinder block.
Do not remove the dowel (2) from the cylinder block unless the dowel is
damaged. The thrust washer can have one or two slots (X).
Do not damage the lobes or the bearings when the camshaft is removed or
installed. Carefully remove the camshaft (3) from the cylinder block. If
necessary, remove the key (4) from the camshaft (3).
Clean the camshaft and the thrust washer. Inspect the camshaft and the
thrust washer for wear and for damage. Replace any worn components or
any damaged components. Clean the camshaft bearing in the cylinder
block. Inspect the camshaft bearing for wear and for damage. If
necessary, replace the camshaft bearing. Inspect the lifters for wear
and for damage.
Replace any worn lifters or any damaged lifters. If necessary, install a
new key (4) into the camshaft (3). Lubricate the bearing surfaces of the
camshaft (3) and lubricate the lobes of the camshaft with clean engine
oil. Carefully install the camshaft (3) into the cylinder block.
Lubricate the thrust washer with clean engine oil. Align the slot (X) in
the thrust washer (1) with the dowel (2) in the cylinder block. Install
the thrust washer (1) into the recess in the cylinder block. The thrust
washer can have one or two slots (X). Install the front housing. Install
the rockershaft and pushrods.
Camshaft Gear
Remove the valve mechanism cover. Remove the front cover. Use Tooling in
order to rotate the crankshaft so that number one piston is at top dead
center on the compression stroke.
Install Tooling through the hole (X) in the camshaft gear (1) into the
front housing. Use Tooling in order to lock the camshaft in the correct
position. Remove the plug (4) from the cylinder block. Install Tooling
into the hole (Y) in the cylinder block. Use Tooling in order to lock
the crankshaft in the correct position.
Loosen the nuts (6) on all rocker arms (7). Unscrew the adjusters (5) on
all rocker arms (7) until all valves are fully closed. Failure to ensure
that all adjusters are fully unscrewed can result in contact between the
1106 Perkins engine valves and pistons.
Alignment of timing marks - Mark the gears (1) and (8) in order to show
alignment. Remove Tooling. Remove the setscrew (3) and the washer (2)
from camshaft gear (1). Remove the camshaft gear (1) from the camshaft.
If the camshaft gear is a tight fit on the nose of the camshaft, use a
prybar in order to remove the camshaft gear. If necessary, remove the
key (not shown) from the nose of the camshaft.
Ensure that number one piston is at top dead center on the compression
stroke. Ensure that Tooling is installed in hole (Y) in the cylinder
block. Use Tooling in order to lock the crankshaft in the correct
position. Ensure that the camshaft gear and the key are clean and free
from wear or damage. If necessary, install the key into the nose of the
camshaft. Ensure that the key is squarely seated.
Align the keyway in the camshaft gear (1) with the key in the camshaft.
Install camshaft gear onto the camshaft. Ensure that the timing marks on
gears (1) and (8) are in alignment and that the mesh of the gears is
correct. Refer to Illustration.
Install Tooling through the hole (X) in the camshaft gear into the front
housing. Install the washer (2) and the setscrew (3) to the camshaft
gear (1). Remove Tooling. Install the plug (4) into hole (Y) in the
cylinder block. Refer to Illustration. Tighten the setscrew (3) to a
torque of 95 Nm (70 lb ft).
Checking backlash - Ensure that the backlash for the gears (1) and (8)
is within specified values. Ensure that the end play for the camshaft
gear (1) is within specified values. Lubricate the teeth of the gears
with clean engine oil. Adjust the valve lash. Install the front cover.
Install the valve mechanism cover.
Lifter Group
Remove the engine oil pump. Remove the camshaft. If the crankshaft is
installed, use Tooling to rotate the crankshaft in order to gain access
to the appropriate lifters (1).
Use Tooling in order to remove the lifters (1). Place a temporary
identification mark on each lifter in order to identify the correct
location. Repeat Steps to remove the remaining lifters.
Clean the lifters. Follow Steps to inspect the lifters. Replace any worn
lifters or damaged lifters. Inspect the seat of the pushrod in the
lifter for visual wear or damage. Inspect the shank of the lifter for
wear or damage. Inspect the face of the lifter that runs on the camshaft
for visual wear or damage.
If the crankshaft is installed, use Tooling to rotate the crankshaft to
access to the cylinder block in order to install the appropriate lifters
(1). Lubricate the lifters (1) with clean engine oil. Use Tooling to
install the lifters (1) to the cylinder block. Ensure that used lifters
are installed in the correct location. The lifters should be free to
rotate. Repeat Steps to install the remaining lifters. Install the
camshaft. Install the engine oil pump.
Camshaft Bearings
Remove the engine oil pump. Remove the camshaft. Inspect the camshaft
bearing (1). If the camshaft bearing (1) is worn or damaged use Tooling
in order to remove the camshaft bearing from the 1106 Perkins cylinder
block. Remove the camshaft bearing from the front of the cylinder block.
Clean the bearing housing in the cylinder block. Ensure that the oil
hole in the bearing housing is free from debris. Lubricate the bearing
housing in the cylinder block with clean engine oil. Accurately align
the large oil hole (X) in camshaft bearing (1) with the oil hole in the
cylinder block. The groove (Y) in the camshaft bearing must be to the
top of the cylinder block.
Use Tooling in order to install the camshaft bearing (1) into the
cylinder block. Install the camshaft bearing so that the front edge of
the bearing is flush with the face of the recess in the cylinder block.
Ensure that the oil holes are correctly aligned. If the oil is not
correctly aligned, the camshaft bearing should be removed. Install the
camshaft.
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