Wacker Neuson 803 Dualpower, Service Manual

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SHB 803 en – Edition 2.4 * 803s410.fm
4-5
Engine
4.3 Checking and adjusting valve clearance
☞ Standard setting of valve clearance is possible:
➥
On a cold engine
☞ Remove the cylinder-head cover
☞
Turn the engine with a screwdriver (as in 4.7) until the cylinder reaches the top dead
center of the compression cycle.
➥ Valve overlapping
☞
Check the valve cap for abnormal wear
☞ Check valve clearance with feeler gage 2/A
➥
Valve clearance: 0.15 – 0.25 mm (0.0059" – 0.0098")
☞ Repeat the procedure for each cylinder
☞
Reset valve clearance if necessary (valve clearance not within the tolerance range).
☞ Loosen the locknut on the rocker arm and reset valve clearance with a screwdriver.
☞
Hold the screw with the screwdriver and counter again.
☞ Position the cylinder-head cover gasket.
☞
Install the cylinder-head cover.
Fig. 1: Valve cap wear
normal
abnormal
Fig. 2: Checking valve clearance
A