Terex TL120 Operating Instructions Manual page 84

7 Care and Maintenance
7.8.7 Checking the valve lash
• Test the valve lash (51/1) on a cold engine by
placing a feeler gauge between the upper part of
the tappet (51/3) and the rocker arm (51/2).
The correct valve lash is as follows:
Inlet valve = 0.20 mm
Exhaust valve = 0.45 mm
Adjust the valve lash, where necessary, as follows:
• Slacken lock nut (51/4).
• Using a screwdriver, adjust the setting screw
(51/5) in such a way that the correct valve lash
(51/1) is obtained when the lock nut is tightened.
Attention
The 1st cylinder is located at the front on the
fan side of the engine.
Valve adjustment
• Remove the cylinder head cover.
• Turn the crankshaft in normal direction of rotation
until the inlet valve 52/7 of cylinder no.4 begins to
open; the outlet valve 52/8 of the same cylinder is
not yet closed completely.
• Check the valve lash of valves 52/1 and 52/2 of
cylinder no. 1 and adjust if required.
• Adjust the valves 52/3 and 52/4 of cylinder no. 2,
as described above for the valves of cylinder no. 4,
for overlap.
• Then check the valve lash of valves 52/5 and 52/6
of cylinder no. 3 and adjust if required.
• Adjust the valves 52/1 and 52/2 of cylinder no. 1
for overlap.
• Check the valve lash of valves 52/7 and 52/8 of
cylinder no. 4 and adjust if required.
• Adjust the valves 52/5 and 52/6 of cylinder no. 3
for overlap.
• Check the valve lash of valves 52/3 and 52/4 of
cylinder no. 2 and adjust if required.
• Re-mount the cylinder head cover along with a
new seal.
84
5
4
Fig. 51 Adjusting the valve lash
Cylinderno.
Valve no.
Valve
I = inlet
E = outlet
Table 30 Cylinder and valve numbers
1 2 3 4
Fig. 52 Valve adjustment
Operating Instructions Wheel Loader TL120
2
1
3
1 2 3 4
1 2 3 4 5 6 7 8
I E I E I E I E
5 6 7 8