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This instruction show you Caterpillar 6D16 engine camshaft removal and installation guide.

Procedures:
Camshaft end play
If the end play measurement exceeds the specified limit, replace the defective part(s).
Inspecting engine speed sensor

Cat com 3 adapter
<Models with electric speed sensor>
Measure the electrical resistance between terminals and .
If the measurement is out of specification, replace the speed sensor 1. P.11-55
CAUTION
Check the tightening torque of the engine speed sensor 1. If the sensor is insufficiently tightened, it may not produce signals.

Fitting side cover
Apply an even, unbroken bead of sealant A to the side cover 5.
Fit the side cover 5 onto the crankcase within 3 minutes of applying the sealant A.

Cat ET 2022A
CAUTION
Ensure that the sealant application surface of the side cover 5 is clean before applying sealant.
When fitting the side cover 5, hold it firmly in position to prevent spreading the sealant.
After fitting the side cover 5, wait at least an hour before starting the engine.
Apply a new bead of sealant A whenever the mounting bolts of the side cover 5 have been loosened.
 

Camshaft assembly
[Removal]
When removing the camshaft assembly 6, take off the side cover 5 and support the camshaft by hand.
Remove the bolts A from the camshaft gear holes, then slowly remove the camshaft assembly 6.
CAUTION
Take care not to damage the camshaft bushings 12 to 15 when removing the camshaft assembly 6.

Caterpillar 320D 291-7589 Chassis Wring Harness
[Installation]
Before installing the camshaft assembly 6, measure the end play between the thrust plate 9 and camshaft 11.
If the measurement exceeds the specified limit, replace the defective part(s).
With the alignment marks lined up on the camshaft gear 8 and No. 2 idler gear, fit the camshaft assembly.

Camshaft gear

[Removal]
CAUTION
The camshaft gear 8 must be removed with the appropriate special tools. Do not tap off the camshaft gear since this would damage it.
: Gear Puller
: Plug
865
18062
02086
02092
02088
11-58
[Installation]
Fit the camshaft gear 8 onto the camshaft 11 in the direction illustrated.
Do not forget to fit the key 10.
 

Inspecting camshaft
(1) Cam lift
If any base circle-to-lobe height difference is less than the required value, replace the camshaft 11.
 

NOTE
Since the cams are tapered, they must be measured at the position A shown in the diagram.
B: Lobe height
C: Base circle diameter
D: Front of engine
(2) Camshaft bend
Support the camshaft 11 at its No. 1 journal E and No. 4 journal F, then take measurements at the No. 2 journal G and No. 3 journal H. If either measurement exceeds the specified limit, replace the camshaft.
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NOTE
Turn the camshaft 11 through one revolution. One-half of the dial indicator reading represents the camshaft's bend. to Camshaft and camshaft bushings
[Inspection]
If any clearance exceeds the specified limit, replace the defective part(s).
NOTE
Measure the camshaft bushings 12 to 15 with the camshaft installed in the crankcase *.

Source:https://caterpillar-macine-repair.blogspot.com/2022/10/caterpillar-6d16-engine-camshaft.html