Wacker Neuson 803 - Checking and Adjusting Valve Clearance

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