AGCO Power 49 - Fitting Timing Gear Casing

7.
Remove the camshaft speed sensor,
hydraulic pump drive unit lubrication pipe and
the drive unit (if installed) and remove the
front cover.
a) Look for the screws attaching to idler
gear shaft.
So called broad timing gear has similar
screws on small idler gear shaft (arrowed
in the picture).
b) If necessary, remove the oil deflector ring
at the front end of the crankshaft.
8.
Remove the high-pressure pump.
° If the timing gear casing does not need
changing, the high-pressure pump can
remain in position.
°
If the high-pressure pump is not removed,
disconnect all leads and pipes from the
high-pressure pump.
9.
Open the idler gear screw and remove the
idler gear.
10.
Remove also the small idler gear (broad
timing gear).
11.
Remove the camshaft.
If the cylinder head and valve mechanism
have not been removed, the tappets must be
prevented from falling down.
12.
Open the timing gear casing screws and
remove the timing gear casing.
If the removal of the casing requires
chocking between the casing and the
cylinder block, make sure that no damage is
caused to the sealing surfaces.
13.
Remove the crankshaft front sealing ring
from the front casing.
Look for the oil deflector ring behind the
sealing ring.
14.
Clean the sealing surfaces and all the parts
that have been removed.
Fig. 65
3.9.2 Fitting timing gear casing
The position of the timing gear casing and cover is determined by two tension pins. The position of the
front cover is determined by a tension pin and idler gear shaft. The position of the broad timing gear casing
cover is determined by idler gear shafts. Therefore centering is not needed when fitting. The tooth
backlash between the different gears must be checked yet.
Casings and covers supplied as spare parts also have holes for the tension pins already machined.
Procedure
1.
Install thread adapter M14/M8 to 84 engine cylinder block.
2.
Fit the timing gear casing.
a) Apply sealant (e.g. Loctite 574) to a sealing surface.
b) Fit the timing gear casing against the cylinder block.
c) Drive in the tension pins with drift 9025 98700.
3. Maintenance
3-40 4th Generation Engines
8370 79492